Professor David Mowbray

Department of Physics and Astronomy

Professor of Physics

Professor David Mowbray
d.mowbray@sheffield.ac.uk
+44 114 222 4561

Full contact details

Professor David Mowbray
Department of Physics and Astronomy
Hicks Building
Hounsfield Road
Sheffield
S3 7RH
Profile

My research involves the application of a range of optical spectroscopic techniques to study physical processes in III-V semiconductors and related nanostructures and devices.

Particular interests are wide band gap materials (AlGaInP and (Al)InGaN) for visible and uv light emitters and quantum dots for high efficiency lasers and novel light emitters.

I was the first person to deduce the band structure of AlGaInP, a semiconductor now used as the basis for high efficiency red, orange and yellow LEDs and red lasers.

I have developed 1.3 um emitting lasers using InAs self-assembled quantum dots which exhibit extremely low operating currents and high temperature stability.

A recent project developed quantum dots lasers on Si substrates, providing the potential for the direct integration of III-V light emitters with Si CMOS electronics.

My current research is a joint project with colleagues at UCL and Warwick to grow and study quantum dots placed within quantum wires. This offers the prospect for high efficiency single photon sources and nanoscale lasers.

Career history

  • PDRA Department of Physics, Oxford University 1987-1989
  • Junior Research Fellow, Worcester College, Oxford University 1987-1989
  • Alexander von Humboldt Fellow, Max Planck Institute, Stuttgart, Germany 1989-1990
  • University Lecturer, Department of Physics, University of Sheffield 1991-1997
  • EPSRC Advanced Fellowship, Department of Physics, University of Sheffield, 1994-1999
  • Reader in Physics, Department of Physics, University of Sheffield, 1997-2005
  • Professor of Physics, Department of Physics, University of Sheffield 2005-
Qualifications
  • Physics BA (1981-1984, Hertford College, Oxford University)
  • Physics DPhil (1984-1989, Hertford College, Oxford University)
Research interests

My recent research has focussed on the application of self-assembled quantum dots to produce high efficiency semiconductor lasers. Conventional semiconductor lasers have many desirable properties but their operating current (threshold current) can be high and this current typically increases rapidly with increasing temperature.

By using quantum dots as the light emitting region it is possible to reduce significantly both the operating current and the temperature sensitivity of this current.

By optimising the epitaxial growth myself and co-workers were able to produce InAs self-assembled quantum dots lasers emitting at 1.3 um with threshold current densities much smaller than comparable quantum well lasers and at the time the lowest ever reported. Later work applied p-type modulation doping to obtain high stability at room temperature.

More recently the ability of quantum dots to trap charges has been used to fabricated high performance lasers on Si substrates. Growth of III-V semiconductors on Si is very challenging as a large density of defects are produced at the Si / III-V interface.

These propagate to the light producing region of the device and significantly degrade its efficiency. By using quantum dots, which prevent carriers migrating to these defects, high light producing efficiency is possible.

Other work has used the capping of InAs quantum dots with a thin GaAsSb layer to extend the emission wavelength out to the main telecommunications band at 1.55 um.

My current work focuses on the study of a new type of quantum dot. These are grown within long nanowires that form from small holes made in an inert layer on a semiconductor substrate or metallic particles deposited on a semiconductor surface. 

Unlike self-assembled quantum dots, which form at random position, these nanowire quantum dots can be made to form at pre-definied positions.

In addition there is considerably more control over their shape and size and it is possible to form stacks with a large number of identical dots, allowing the formation of nanoscale lasers.

The nanowire may act as an optical cavity to give very high light extraction for optical emitters. This project is a collaboration with University College London and the University of Warwick.

Publications

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Journal articles

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Journal articles

Chapters

Conference proceedings papers

  • Fonseka A, Velychko AV, Zhang Y, Davis GD, Gott JA, Godde T, Sanchez AM, Beanland R, Liu H & Mowbray DJ (2020) GaAsP nanowires containing intentional and self-forming quantum dots. Quantum Dots, Nanostructures, and Quantum Materials: Growth, Characterization, and Modeling XVII, 1 February 2020 - 6 February 2020. RIS download Bibtex download
  • Roberts TS, Stevens B, Clarke E, Tooley I, orchard J, Farrer I, Childs DTD, Babazadeh N, Ozaki N, Mowbray D & Hogg R (2016) Strain balancing of MOVPE InAs/GaAs quantum dots using GaAs0.8P0.2. International Semiconductor Laser Conference (ISLC) View this article in WRRO RIS download Bibtex download
  • Orchard JR, Woodhead C, Shutts S, Wu J, Sobiesierski A, Young RJ, Beanland R, Liu H, Smowton PM & Mowbray DJ (2016) Analysing radiative and non-radiative recombination in InAs QDs on Si for integrated laser applications. Quantum Dots and Nanostructures: Growth, Characterization, and Modeling XIII View this article in WRRO RIS download Bibtex download
  • Orchard JR, Wu J, Chen S, Jiang Q, Ward T, Beanland R, Lui H & Mowbray D (2015) Optimising the defect filter layer design for III/V QDs on Si for integrated laser applications. Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII RIS download Bibtex download
  • Orchard JR, Zhang Y, Wu J, Liu H & Mowbray D (2015) Optical characterisation of catalyst free GaAsP and GaAsP core-shell nanowires grown directly on Si substrates by MBE. Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII RIS download Bibtex download
  • Haxha V, Garg R, Mighorato MA, Drouzas IW, Ulloa JM, Koenraad PM, Steer MJ, Liu HY, Hopkinson MJ & Mowbray DJ (2009) Empirical bond order potential calculations of the elastic properties of epitaxial InGaSbAs layers. MICROELECTRONICS JOURNAL, Vol. 40(3) (pp 533-536) RIS download Bibtex download
  • Haxha V, Garg R, Migliorato MA, Drouzas IW, Ulloa JM, Koenraad PM, Steer MJ, Liu HY, Hopkinson M & Mowbray DJ (2008) The use of Abell-Tersoff potentials in atomistic simulations of InGaAsSb/GaAs. OPTICAL AND QUANTUM ELECTRONICS, Vol. 40(14-15) (pp 1143-1148) RIS download Bibtex download
  • Jin CY, Liu HY, Badcock TJ, Groom KM, Mowbray DJ, Hopkinson M & Wada O (2008) Novel, Simple Model for High Temperature Stability of InAs/GaAs Self-assembled Quantum Dot Lasers with Optimum p-type Modulation Doping. Extended Abstracts of the 2008 International Conference on Solid State Devices and Materials, 23 September 2008 - 26 September 2008. RIS download Bibtex download
  • Mowbray DJ, Badcock TJ, Jang YD, Liu HY, Royce RJ, Nabavi E, Hogg RA, Skolnick MS, Hopkinson M, Park J , Lee D et al (2008) Development of Self-assembled Quantum Dot Lasers for Telecommunications Applications (Invited). Extended Abstracts of the 2008 International Conference on Solid State Devices and Materials, 23 September 2008 - 26 September 2008. RIS download Bibtex download
  • Liu HY, Hopkinson M, Groom K, Hogg RA & Mowbray DJ (2008) High-performance 1300-nm InAs/GaAs quantum-dot lasers. Proceedings of SPIE - The International Society for Optical Engineering, Vol. 6909 RIS download Bibtex download
  • Hasbullah NF, Ng JS, Liu HY, Hopkinson M, David JPR, Badcock TJ, Mowbray DJ, Sanchez AM & Beanland R (2008) Effects of spacer growth temperature on the optical properties of quantum dot laser structures - art. no. 68000U. DEVICE AND PROCESS TECHNOLOGIES FOR MICROELECTRONICS, MEMS, PHOTONICS AND NANOTECHNOLOGY IV, Vol. 6800 (pp U8000-U8000) RIS download Bibtex download
  • Olaizola SM, Fan WH, Mowbray DJ, Skolnick MS, Parbrook PJ & Fox AM (2007) Phonon satellites and time-resolved studies of carrier recombination dynamics in InGaN quantum wells. SUPERLATTICES AND MICROSTRUCTURES, Vol. 41(5-6) (pp 419-424) RIS download Bibtex download
  • Ulloa JM, Celebi C, Koenraad PM, Simon A, Gapihan E, Letoublon A, Bertru N, Drouzas I, Mowbray DJ, Steer MJ & Hopkinson M (2007) Atomic scale study of the impact of the strain and composition of the capping layer on the formation of InAs quantum dots. JOURNAL OF APPLIED PHYSICS, Vol. 101(8) RIS download Bibtex download
  • Jin CY, Liu HY, Groom KM, Hopkinson M, Badcock TJ, Royce RJ & Mowbray DJ (2007) Photon coupling mechanism in 1.3-μm quantum-dot lasers. Conference on Lasers and Electro-Optics, 2007, CLEO 2007 RIS download Bibtex download
  • Taboada AG, Suárez F, Granados D, Badcock TJ, Mowbray DJ, Groom KM, Alén B, García JM & Dotor ML (2007) Electro-optical characterization of self-assembled InAs/GaAs quantum rings embedded in P-i-N and Schottky diodes. AIP Conference Proceedings, Vol. 893 (pp 909-910) RIS download Bibtex download
  • Alexander RR, Childs D, Agarwal H, Groom KM, Liu HY, Hopkinson M, Hogg RA, Badcock TJ, Mowbray DJ, Skolnick MS , Ishida M et al (2007) Systematic study of the effects of δ-p-doping on 1.3μm Dot-in-well lasers. Conference on Lasers and Electro-Optics Europe - Technical Digest RIS download Bibtex download
  • Jin CY, Liu HY, Groom KM, Hopkinson M, Badcock TJ, Royce RJ & Mowbray DJ (2007) Photon Coupling Mechanism in 1.3-mu m Quantum-Dot Lasers. 2007 CONFERENCE ON LASERS & ELECTRO-OPTICS/QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2007), VOLS 1-5 (pp 2340-2341) RIS download Bibtex download
  • MOWBRAY D, BADCOCK TOM, SELLERS IAN, RAMSAY A, SKOLNICK M, LIU H-Y, HOPKINSON M, GROOM K, HOGG R, BEANLAND R , CHILDS D et al (2007) GROWTH AND CHARACTERIZATION OF MULTI-LAYER 1.3 μm QUANTUM DOT LASERS. International Journal of Nanoscience, Vol. 06(03n04) (pp 291-296) RIS download Bibtex download
  • Smowton PM, Sandall IC, Mowbray DJ, Liu HY & Hopkinson M (2007) Maximising the gain - Optimising the carrier distribution in InGaAs quantum dot lasers. Proceedings of SPIE - The International Society for Optical Engineering, Vol. 6468 RIS download Bibtex download
  • Alexander RR, Childs D, Agarwal H, Groom KM, Liu HY, Hopkinson M, Hogg RA, Ishida M, Yamamoto T, Sugawara M , Arakawa Y et al (2007) Systematic study of the effects of modulation p-doping on 1.3 mu m InAs/GaAs dot-in-well lasers. 2007 International Conference on Indium Phosphide and Related Materials, Conference Proceedings (pp 517-520) RIS download Bibtex download
  • Tartakovskii AI, Savelyev AV, Makhonin MN, Skolnick MS, Mowbray DJ, Maximov MV, Ustinov VM & Seisyan RP (2007) Charging and spin-polarization effects in InAs quantum dots under bipolar carrier injection - art. no. 64710J. Ultrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV, Vol. 6471 (pp J4710-J4710) RIS download Bibtex download
  • Badcock TJ, Mowbray DJ, Nabavi E, Liu HY, Steer MJ, Hopkinson M, Hayne M, Nuytten T & Moshchalkov VV (2007) Electronic structure of long wavelength (> 1.3 mu m) GaAsSb-capped InAs quantum dots. Physics of Semiconductors, Pts A and B, Vol. 893 (pp 951-952) RIS download Bibtex download
  • Jin CY, Liu HY, Badcock TJ, Groom KM, Gutierrez M, Royce R, Hopkinson M & Mowbray DJ (2006) High-performance 1.3 mu m InAs/GaAs quantum-dot lasers with low threshold current and negative characteristic temperature. IEE PROCEEDINGS-OPTOELECTRONICS, Vol. 153(6) (pp 280-283) RIS download Bibtex download
  • Sandall IC, Walker CL, Smowton PM, Mowbray DJ, Liu HY & Hopkinson M (2006) Measurement of modal absorption, gain and recombination in p-doped and intrinsic quantum dot structures. IEE PROCEEDINGS-OPTOELECTRONICS, Vol. 153(6) (pp 316-320) RIS download Bibtex download
  • Brown J, Wells JPR, Hashemizadeh SA, Parbrook PJ, Wang T, Fox AM, Mowbray DJ & Skolnick MS (2006) Fast spin relaxation in InGaN/GaN multiple quantum wells. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, Vol. 243(7) (pp 1643-1646) RIS download Bibtex download
  • Smowton PM, Sandall IC, Walker CL, Thomson JD, Sobiesierski A, Badcock T, Mowbray DJ, Liu HY & Hopkinson M (2006) Characterisation of modulation doped quantum dot lasers. Proceedings of SPIE - The International Society for Optical Engineering, Vol. 6133 RIS download Bibtex download
  • Smowton PM, Sandall IC, Mowbray DJ, Liu HY & Hopkinson M (2006) 1.3 mu m emitting, self assembled quantum dot lasers. 2006 IEEE LEOS Annual Meeting Conference Proceedings, Vols 1 and 2 (pp 867-867) RIS download Bibtex download
  • Liu HY, Badcock TJ, Groom KM, Hopkinson M, Gutierrez M, Childs DT, Jin C, Hogg RA, Sellers IR, Mowbray DJ , Skolnick MS et al (2006) High-performance 1.3-mu m InAs/GaAs quantum-dot lasers with low threshold current and negative characteristic temperature - art. no. 618417. Semiconductor Lasers and Laser Dynamics II, Vol. 6184 (pp 18417-18417) RIS download Bibtex download
  • Hashemizadeh SA, Wells JPR, Brown J, Murzyn P, Jones BD, Wang T, Parbrook PJ, Fox AM, Mowbray DJ & Skolnick MS (2006) Stimulated emission and carrier dynamics in AlInGaN multi-quantum wells. PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 3, NO 6, Vol. 3(6) (pp 1958-1961) RIS download Bibtex download
  • Liu HY, Sellers IR, Gutierrez M, Groom KM, Beanland R, Soong WM, Hopkinson M, David JPR, Badcock TJ, Mowbray DJ & Skolnick MS (2005) Optimizing the growth of 1.3-mu m InAs/InGaAs dots-in-a-well structure: Achievement of high-performance laser. MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, Vol. 25(5-8) (pp 779-783) RIS download Bibtex download
  • Liu HY, Badcock TJ, Sellers IR, Soong WM, Groom KM, Hopkinson M, Mowbray DJ & Skolnick MS (2005) Enhanced photoluminescence intensity of 1.3-mu m multi-layer InAs/InGaAs dots-in-well structure using the high growth temperature spacer layer step. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Vol. 26(1-4) (pp 129-132) RIS download Bibtex download
  • Oulton R, Tartakovskii AI, Ebbens A, Finley JJ, Mowbray DJ, Skolnick MS & Hopkinson M (2005) Anomalous Stark shifts in single vertically coupled pairs of InGaAs quantum dots. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Vol. 26(1-4) (pp 302-307) RIS download Bibtex download
  • Sellers IR, Liu HY, Badcock TJ, Groom KM, Mowbray DJ, Gutierrez M, Hopkinson M & Skolnick MS (2005) Lasing and spontaneous emission characteristics of 1.3 mu m In(Ga)As quantum-dot lasers. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Vol. 26(1-4) (pp 382-385) RIS download Bibtex download
  • Marko IP, Masse N, Sweeney SJ, Adams AR, Sellers IR, Mowbray DJ, Skolnick MS, Liu HY & Groom KM (2005) Effect of gain saturation and nonradiative recombination on the thermal characteristics of InAs/GaAs 1.3 μm quantum dot lasers. Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, Vol. 2005 (pp 402-403) RIS download Bibtex download
  • Smowton PM, Walker CL, Sandall IC, Sellers IR, Mowbray DJ, Liu HY, Gutierrez M & Hopkinson M (2005) Growth and characterisation of multiple layer quantum dot lasers. Novel In-Plane Semiconductor Lasers IV, Vol. 5738 (pp 332-346) RIS download Bibtex download
  • Skolnick MS & Mowbray DJ (2005) Physics and applications of self-assembled semiconductor quantum dots. Physics of Semiconductors, Pts A and B, Vol. 772 (pp 50-55) RIS download Bibtex download
  • Sellers IR, Liu HY, Mowbray DJ, Badcock TJ, Groom KM, Hopkinson M, Gutierrez M, Skolnick MS, Beanland R, Childs DT & Robbins DJ (2005) Growth and characterization of 1.3 mu m multi-layer quantum dots lasers incorporating high growth temperature spacer layers. Physics of Semiconductors, Pts A and B, Vol. 772 (pp 1547-1548) RIS download Bibtex download
  • Skolnick MS & Mowbray DJ (2004) Recent developments in the physics and applications of self-assembled quantum dots. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Vol. 21(2-4) (pp 155-163) RIS download Bibtex download
  • Finley JJ, Sabathil M, Oulton R, Tartakovskii AI, Mowbray DJ, Skolnick MS, Liew S, Migliorato M, Hopkinson M & Vogl P (2004) Systematic reduction of the permanent exciton dipole for charged excitons in individual self-assembled InGaAs quantum dots. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Vol. 21(2-4) (pp 199-203) RIS download Bibtex download
  • Tartakovskii A, Cahill J, Whittaker D, Wells J-P, Fox M, Mowbray D, Skolnick M, Groom K, Steer M & Hopkinson M (2004) Long-lived spin coherence and temperature-induced dephasing in InAs quantum dots measured via quantum beats. Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies, 2004. RIS download Bibtex download
  • Marko IP, Adams AR, Sweeney SJ, Sellers IR, Mowbray DJ, Skolnick MS, Liu HY & Groom KM (2004) Recombination and loss mechanisms in low-threshold InAs/GaAs 1.3 μm quantum dot lasers. Conference Digest - IEEE International Semiconductor Laser Conference (pp 57-58) RIS download Bibtex download
  • Tartakovsk AI, Cahill J, Whittaker DM, Wells JPR, Fox AM, Mowbray DJ, Skolnick MS, Groom KM, Steer MJ & Hopkinson M (2004) Long-lived spin coherence and temperature-induced dephasing in InAs quantum dots measured via quantum beats. OSA Trends in Optics and Photonics Series, Vol. 97 (pp 667-668) RIS download Bibtex download
  • Smowton PM, Lutti J, Lewis GM, Blood P, Ramsey AJ, Mowbray DJ, Krysa AB, Lin JC & Roberts JS (2004) Optimization of gain in multilayer GaInP quantum dots. Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, Vol. 2 (pp 695-696) RIS download Bibtex download
  • Walker CL, Sandall IC & Smowton PM (2004) Improved gain and loss performance of 1.3 mu m quantum dot lasers using high growth temperature GaAs Spacer layer. 2004 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1 AND 2 (pp 212-213) RIS download Bibtex download
  • Tartakovskii AI, Groom KM, Adawi AM, Lemaitre A, Mowbray DJ, Skolnick MS & Hopkinson M (2004) Dynamics of stimulated emission in InAs quantum dot laser structures measured in pump-probe experiments. ULTRAFAST PHENOMENA IN SEMICONDUCTORS AND NANOSTRUCTURE MATERIALS VIII, Vol. 5352 (pp 348-354) RIS download Bibtex download
  • Fan WH, Olaizola SM, Wang T, Parbrook PJ, Wells JPR, Mowbray DJ, Skolnick MS & Fox AM (2003) Carrier capture times in InGaN/GaN multiple quantum wells. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, Vol. 240(2) (pp 364-367) RIS download Bibtex download
  • Monte AFG, Finley JJ, Whittaker DM, Itskevitch I, Mowbray DJ, Skolnick MS, Sales FV & Hopkins M (2003) Non-linear effects on the power dependent photocurrent of self-assembled InAs/GaAs quantum dots. MICROELECTRONICS JOURNAL, Vol. 34(5-8) (pp 667-669) RIS download Bibtex download
  • Monte AFG, Finley JJ, Itskevitch I, Skolnick MS, Mowbray DJ & Hopkins M (2003) Effects of charge accumulation on the photocurrent and photoluminescence characteristics of self-assembled InAs/GaAs quantum dots. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Vol. 17(1-4) (pp 37-39) RIS download Bibtex download
  • Monte AFG, Finley JJ, Ashmore A, Fox AM, Skolnick MS, Mowbray DJ & Hopkins M (2003) Carrier dynamics in red-emitting self-organised InAs-AlGaAs quantum dots with indirect barriers. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Vol. 17(1-4) (pp 109-110) RIS download Bibtex download
  • Ashmore AD, Finley JJ, Oulton R, Fry PW, Lemaitre A, Mowbray DJ, Skolnick MS, Hopkinson M, Buckle PD & Maksym PA (2002) Optical properties of single charge tuneable InGaAs quantum dots. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Vol. 13(2-4) (pp 127-130) RIS download Bibtex download
  • Pendlebury ST, Lynam P, Mowbray DJ, Parbrook PJ, Wood DA, Lada M, O'Neill JP, Cullis AG & Skolnick MS (2001) Optical characterisation of AlGaN epitaxial layers and GaN/AlGaN quantum wells. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, Vol. 188(2) (pp 871-875) RIS download Bibtex download
  • Finley JJ, Lemaitri A, Ashmore AD, Mowbray DJ, Skolnick MS, Hopkinson M & Krauss TF (2001) Excitation and relaxation mechanisms in single In(Ga)As quantum dots. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, Vol. 224(2) (pp 373-378) RIS download Bibtex download
  • Yuan ZL, Foo ERAD, Ryan JF, Mowbray DJ, Skolnick MS & Hopkinson M (2001) Recombination of many-particle states in InAs self-organized quantum dots. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, Vol. 224(2) (pp 409-412) RIS download Bibtex download
  • Fry PW, Mowbray DJ, Itskevich IE, Skolnick MS, Barker JA, O'Reilly EP, Hopkinson M, Al-Khafaji M, David JPR, Cullis AG & Hill G (2001) Photocurrent spectroscopy of InAs/GaAs self-assembled quantum dots. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, Vol. 224(2) (pp 497-502) RIS download Bibtex download
  • Lemaitre A, Finley JJ, Ashmore AD, Mowbray DJ, Skolnick MS, Itskevich IE, Hopkinson M & Krauss TF (2001) Optical spectroscopy of single InAs quantum dots: excitation and relaxation mechanisms. PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II, Vol. 87 (pp 1195-1196) RIS download Bibtex download
  • Fry PW, Skolnick MS, Mowbray DJ, Itskevich IE, Finley JJ, Wilson LR, Schumacher KL, Barker JA, O'Reilly EP, Al-Khafaji M , Cullis AG et al (2001) Electronic properties of InAs/GaAs self-assembled quantum dots studied by photocurrent spectroscopy. PHYSICA E, Vol. 9(1) (pp 106-113) RIS download Bibtex download
  • Mowbray DJ, Fry PW, Skolnick MS, Itskevich IE, Harris L, Ashmore AD, Finley JJ, Wilson LR, Schumacher KL, Barker JA , O'Reilly EP et al (2000) Electronic properties of InAs/GaAs self-assembled quantum dot structures and devices studied by photocurrent spectroscopy. ACTA PHYSICA POLONICA A, Vol. 98(3) (pp 279-293) RIS download Bibtex download
  • Mowbray DJ, Harris L, Fry PW, Ashmore AD, Parnell SR, Finley JJ, Skolnick MS, Hopkinson M, Hill G & Clark J (2000) InAs-GaAs self-assembled quantum dot lasers: physical processes and device characteristics. PHYSICA E, Vol. 7(3-4) (pp 489-493) RIS download Bibtex download
  • Fry PW, Itskevich IE, Mowbray DJ, Skolnick MS, Barker JA, O'Reilly EP, Wilson LR, Maksym PA, Hopkinson M, Al-Khafaji M , David JPR et al (2000) Photocurrent spectroscopy of InAs/GaAs self-assembled quantum dots: observation of a permanent dipole moment. PHYSICA E, Vol. 7(3-4) (pp 408-412) RIS download Bibtex download
  • Yuan ZL, Foo ERAD, Ryan JF, Mowbray DJ, Skolnick MS & Hopkinson M (2000) Dynamical band gap renormalization in self-organized InAs/GaAs quantum dots. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, Vol. 178(1) (pp 345-348) RIS download Bibtex download
  • Fry PW, Itskevich IE, Mowbray DJ, Skolnick MS, Barker J, O'Reilly EP, Hopkinson M, Al-Khafaji M, Cullis AG, Hill G & Clark JC (2000) Quantum confined Stark effect and permanent dipole moment of InAs-GaAs self-assembled quantum dots. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, Vol. 178(1) (pp 269-275) RIS download Bibtex download
  • Skolnick MS, Fry PW, Itskevich IE, Mowbray DJ, Barker JA, O'Reilly EP, Hopkinson M, Al-Khafaji M, Cullis AG, Hill C & Clark JC (2000) The stark effect and electron-hole wavefunctions in InAs-GaAs self-assembled quantum dots. OPTICAL PROPERTIES OF SEMICONDUCTOR NANOSTRUCTURES, Vol. 81 (pp 337-346) RIS download Bibtex download
  • Fry PW, Itskevich IE, Mowbray DJ, Sholnick MS, Barker JA, O'Reilly EP, Wilson LR, Larkin IA, Maksym PA, Hopkinson M , Al-Khafaji M et al (2000) Photocurrent spectroscopy of InAs/GaAs self-assembled quantum dots: Observation of a permanent dipole moment. SEMICONDUCTOR QUANTUM DOTS, Vol. 571 (pp 147-152) RIS download Bibtex download
  • Yuan ZL, Foo ERAD, Ryan JF, Mowbray DJ, Skolnick MS & Hopkinson M (1999) Many-body effects in carrier capture and energy relaxation in self-organized InAs/GaAs quantum dots. PHYSICA B, Vol. 272(1-4) (pp 12-14) RIS download Bibtex download
  • Jones G, Cain N, Peggs DW, Petrie RP, Bland SW & Mowbray DJ (1999) An optical study of the properties of (AlxGa1-x)(0.5)In0.49P epitaxial layers with varying composition, hydrostatic pressure and GaAs substrate orientation. MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, Vol. 66(1-3) (pp 126-130) RIS download Bibtex download
  • Mogensen PC, Jones G, Cain N, Blood P, Mowbray DJ, Bland SW, Peggs D & Petrie RP (1999) Characterisation of the effects of Al incorporation in AlGaInP light emitters. COMPOUND SEMICONDUCTORS 1998(162) (pp 161-166) RIS download Bibtex download
  • Al-Khafaji MA, Cullis AG, Hopkinson M, Mowbray DJ & Skolnick MS (1999) Effect of growth rate on the morphology and composition of InAs quantum dots grown on GaAs by MBE. MICROSCOPY OF SEMICONDUCTING MATERIALS 1999, PROCEEDINGS(164) (pp 111-116) RIS download Bibtex download
  • Al-Khafaji MA, Cullis AG, Hopkinson M, Wilson LR, Parnell SR, Mowbray DJ & Skolnick MS (1999) TEM nanoscale analysis of InAs quantum dots grown on GaAs by MBE. ELECTRON MICROSCOPY AND ANALYSIS 1999(161) (pp 585-588) RIS download Bibtex download
  • Itskevich IE, Trojan IA, Lyapin SG, Steer MJ, Wilson LR, Mowbray DJ, Skolnick MS, Hopkinson M, Eaves L & Main PC (1999) Excited states in self-assembled InAs/GaAs quantum plots under high pressure. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, Vol. 211(1) (pp 73-77) RIS download Bibtex download
  • Wilson LR, Mowbray DJ, Skolnick MS, Harris L, Morifuji M, Larkin IA, Steer MJ & Hopkinson M (1998) Magneto-optical spectroscopy of InAs/GaAs self-organised quantum dots. PHYSICA E, Vol. 2(1-4) (pp 689-693) RIS download Bibtex download
  • Steer MJ, Mowbray DJ, Skolnick MS, Tribe WR, Forshaw AN, Whittaker DM, Roberts JS, Cullis AG, Hill G, Pate M & Whitehouse CR (1998) Optical spectroscopy of GaAs-AlGaAs v-groove quantum wires. PHYSICA E, Vol. 2(1-4) (pp 949-953) RIS download Bibtex download
  • Al-Khafaji MA, Cullis AG, Hopkinson M, Mowbray DJ, Migliorato M, Wilson LR, Skolnick MS & Whitehouse CR (1998) TEM observations of the variation in the configuration of self-assembled InAs quantum dots on GaAs. ELECTRON MICROSCOPY 1998, VOL 3 (pp 371-372) RIS download Bibtex download
  • Mowbray DJ, Kowalski OP, Cockburn JW, Skolnick MS, Hopkinson M & David JPR (1997) Optical spectroscopic determination of the electronic band structure of bulk AlGaInP and GaInP-AlGaInP heterojunction band offsets. IN-PLANE SEMICONDUCTOR LASERS: FROM ULTRAVIOLET TO MIDINFRARED, Vol. 3001 (pp 135-146) RIS download Bibtex download
  • Wong KS, Wang H, Sou IK, Wong GKL & Mowbray DJ (1996) Stimulated and spontaneous emission studies in ZnS1-xTex/ZnSe strain layer superlattices. JOURNAL OF CRYSTAL GROWTH, Vol. 159(1-4) (pp 689-693) RIS download Bibtex download
  • Peggs DW, Skolnick MS, Whittaker DM, Hogg RA, Willcox ARK, Mowbray DJ, Grey R, Rees GJ, Hart L, Hopkinson M , Hill G et al (1996) Wannier-Stark ladder spectra in InxGa1-xAs-GaAs strained layer piezo-electric superlattices. SOLID-STATE ELECTRONICS, Vol. 40(1-8) (pp 167-170) RIS download Bibtex download
  • Whittaker DM, Peggs DW, Hogg RA, Skolnick MS, Grey R, Mowbray DJ & Rees GJ (1995) Stark ladders in piezoelectric superlattices.. NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS, Vol. 17(11-12) (pp 1775-1779) RIS download Bibtex download
  • FISHER TA, HOGG RA, WILLCOX ARK, WHITTAKER DM, SKOLNICK MS, MOWBRAY DJ, DAVID JPR, PABLA AS, REES GJ, GREY R , SANCHEZROJAS JL et al (1994) SPECTROSCOPIC STUDY OF PIEZOELECTRIC FIELD EFFECTS IN INGAAS/GAAS MULTIQUANTUM WELLS GROWN ON (111)B ORIENTED GAAS SUBSTRATES. SOLID-STATE ELECTRONICS, Vol. 37(4-6) (pp 645-648) RIS download Bibtex download
  • SKOLNICK MS, NASH KJ, MOWBRAY DJ, SAKER MK, FISHER TA, WHITTAKER DM, PEGGS DW, MIURA N, SASAKI S, SMITH RS & BASS SJ (1994) FERMI SEA SHAKE-UP IN QUANTUM-WELL LUMINESCENCE SPECTRA. SOLID-STATE ELECTRONICS, Vol. 37(4-6) (pp 825-829) RIS download Bibtex download
  • Arent DJ, Alonso RG, Horner GS, Kibbler AE, Olson JM, Yin X, Delong MC, Springthorpe AJ, Majeed A, Mowbray DJ & Skolnick MS (1994) Optical properties and electroluminescence of ordered and disordered AlAs/GaAs superlattices. Materials Research Society Symposium Proceedings, Vol. 325 (pp 499-505) RIS download Bibtex download
  • HOPKINSON M, DAVID JPR, KOWALSKI OP, MOWBRAY DJ & SKOLNICK MS (1994) GROWTH AND CHARACTERIZATION OF HIGH-QUALITY GAINP/ALGAINP QUANTUM-WELLS BY SOLID-SOURCE MOLECULAR-BEAM EPITAXY. SIXTH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE AND RELATED MATERIALS: CONFERENCE PROCEEDINGS (pp 551-554) RIS download Bibtex download
  • DELONG MC, MOWBRAY DJ, HOGG RA, SKOLNICK MS, WILLIAMS JE, MEEHAN K, KURTZ SR, OLSON JM, WU MC & HOPKINSON M (1994) THE BAND-GAP OF PERFECTLY DISORDERED GA0.52IN0.48P. 12TH NREL PHOTOVOLTAIC PROGRAM REVIEW(306) (pp 529-537) RIS download Bibtex download
  • Evans HB, Eaves L, White CRH, Henini M, Buckle PD, Fisher TA, Mowbray DJ & Skolnick MS (1993) Quantum Well Luminescence by Resonant Tunneling Injection of Electrons and Holes (pp 387-399) RIS download Bibtex download
  • Liu HY, Airey RJ, Steer MJ, Houston PA, Sellers IR & Mowbray DJ () GaAs-based red-emitting InAlAs/AlGaAs quantum dots and quantum-dot laser. International Conference on Molecular Bean Epitaxy RIS download Bibtex download
Research group
Grants
  • EPSRC InAs quantum dot lasers on Si substrates April 2012 – March 2016
  • Innovate UK Fibre wavelength quantum light sources July 2015 – September 2020
  • EPSRC Self-catalysed GaAsP/GaAs nanowire quantum dots for silicon-based novel quantum emitters October 2016 – March 2020
Teaching activities

Current

  • PHY21005 Fourier Techniques
  • PHY21005 Electromagnetism
  • PHY340 Problem solving
  • Year 2 Physics Tutor
  • Head of Year 2 Physics
  • Senior Tutor

Recent

  • PHY119 Nanotechnology
  • PHY251 Solids

Recent undergraduate projects supervised

  • The physics of digital photography (year 3)
  • The physics of projectiles (year 3)
  • Environmental sensing with a Raspberry Pi (year 3)
  • Development of a presentation to teach the topic of sound to primary school children  (year 3)
  • Developing experiments to demonstrate the properties of light (year 3)
  • Optical spectroscopy of semiconductor nanowires incorporating quantum dots (year 4)

Schools outreach talks

  • Electricity (primary school)
  • Sound (primary school)
  • Light (primary school)
  • Electromagnetic spectrum (secondary / 6th Form)
  • Nanotechnology (6th Form)
  • Solar Energy (6th Form)
  • Quantum Mechanics (6th Form)
Professional activities
  • Member of the Institute of Physics
  • Member of Institute of Physics Degree Accreditation Committee
  • External Member of Open University Qualifications and Assessment Committee 2016-2021
  • External Examiner Newcastle University 2016-2020
  • External Examiner University of St Andrews 2019-

Departmental administration

  • Head of Teaching 2004-2012
  • Head of Department 2006-2012, Jan-Dec 2017
  • Chair Equality and Diversity Committee 2012-2016
  • Coordinator Sheffield-Nanjing Technical University Materials Physics Joint Degree 2013-2020
  • Senior Tutor 2018-
  • Head of Year 2 Physics 2020-