Dr Andrew Maiden

PhD, MEng

Department of Electronic and Electrical Engineering

Lecturer Computational Holography

Semiconductor Materials and Devices Research Group

Headshot of Andy Maiden
a.maiden@sheffield.ac.uk
+44 114 222 5181

Full contact details

Dr Andrew Maiden
Department of Electronic and Electrical Engineering
Sir Frederick Mappin Building
Mappin Street
Sheffield
S1 3JD
Profile

I’m interested in computational optics – enhancing optical systems such as microscopes, cameras or projectors with computer code.

My interest began with my PhD at Durham University, where I used computer modelling of the way light propagates to design digital holograms.

The holograms were printed out and projected a 3D pattern of circuitry when illuminated with a laser. We used these projected patterns to expose photoresist for the manufacture of volumetric integrated circuits and 3D antennas.

I spent a year living in the Lake District (where I grew up) after my PhD. I got to indulge my passion for outdoor sports – rock climbing, fell running and triathlon – whilst I was there, so when I decided to return to academia Sheffield was a natural choice, being a very outdoors city with excellent Universities.

I moved to Sheffield to work with Professor John Rodenburg and was lucky enough to join him in the pioneering days of a computational optics technique called ptychography (pronounced tie-cog- ra-fee).

Ptychography uses diffraction pattern measurements to enhance microscopes. It realises ‘perfect’ imaging, where the image of a microscopic specimen it recreates is an exact copy of how that specimen interacts with a beam of light.

I left Sheffield University for a brief spell to work with a spin-out company on commercialisation of ptychography-enhanced microscopes. I missed the freedom of the academic environment, and returned as a Lecturer after a couple of years.

As well as my continuing research in computational optics, I now teach analogue electronics to our third years and a hands-on module in optical imaging systems as part of our new two year MSc programme in Bioengineering: Imaging and sensing.

I’m also the PhD Admissions Tutor for our Department, so if you’re interested in coming to Sheffield to continue your studies, please get in touch.

Qualifications
  • PhD, University of Durham 2005
  • MEng (Electronic & Electrical Engineering), University of Birmingham 2001
Research interests
  • Coherent Diffractive Imaging (CDI)
  • Ptychography
  • Computer-generated holography
  • Phase imaging in the Transmission Electron Microscope (TEM)
  • Inverse problems
  • Image processing
Publications

Journal articles

Chapters

Conference proceedings papers

  • Zhang Z & Maiden AM (2019) A comparison of ptychographic phase retrieval algorithms. Quantitative Phase Imaging V, 2 February 2019 - 7 February 2019. RIS download Bibtex download
  • Li P & Maiden A (2017) Optical ptychography with extended depth of field. Journal of Physics: Conference Series, Vol. 902 (pp 012015-012015) View this article in WRRO RIS download Bibtex download
  • Li P & Maiden A (2017) Ptychography for strongly scattering 3D objects. Optics in the Life Sciences Congress, 2017. RIS download Bibtex download
  • Rodenburg JM, Cao S & Maiden AM (2016) OPTICAL ARRANGEMENTS FOR PHASE-SENSITIVE IMAGING USING ELECTRON PTYCHOGRAPHY. RECENT TRENDS IN CHARGED PARTICLE OPTICS AND SURFACE PHYSICS INSTRUMENTATION (pp 60-61) RIS download Bibtex download
  • Maiden A (2014) Super-resolved Ptychographic Imaging. Microscopy and Microanalysis, Vol. 20(S3) (pp 372-373) RIS download Bibtex download
  • Maiden AM (2014) Three-dimensional Ptychography. Classical Optics 2014, 2014. RIS download Bibtex download
  • Rodenburg JM, Maiden AM & Humphry MJ (2010) TRANSMISSION AND REFLECTION MICROSCOPY WITHOUT LENSES. RECENT TRENDS IN CHARGED PARTICLE OPTICS AND SURFACE PHYSICS INSTRUMENTATION (pp 61-62) RIS download Bibtex download
  • Williams GL, McWilliam RP, Toriz-Garcia J, Curry R, Maiden A, Seed NL, Purvis A & Ivey PA (2008) A photolithographic process for grossly non-planar substrates - art. no. 69212E. EMERGING LITHOGRAPHIC TECHNOLOGIES XII, PTS 1 AND 2, Vol. 6921 (pp E9212-E9212) RIS download Bibtex download
  • McWilliam R, Johnson S, Maiden A, Purvis A, Luke Seed N, Williams GL & Ivey PA (2006) Non-planar photolithography using digital holograms. Optics InfoBase Conference Papers RIS download Bibtex download
  • Ivey P, McWilliam R, Maiden A, Williams G, Purvis A & Seed L (2006) Photolithography on three dimensional substrates. Proceedings - Electronic Components and Technology Conference, Vol. 2006 (pp 283-288) RIS download Bibtex download
  • Williams GL, McWilliam R, Maiden A, Purvis A, Ivey PA & Seed NL (2005) Photolithography on grossly non-planar substrates. Proceedings of the Seventh IEEE CPMT Conference on High Density Microsystem Design, Packaging and Failure Analysis (HDP'05) (pp 442-446) RIS download Bibtex download

Patents

  • Maiden A (2015) Calibration of a probe in ptychography. US8942449 (US). Appl. 27 Jan 2015. RIS download Bibtex download
  • Maiden A (2014) Provision of image data. US8908910 Appl. 09 Dec 2014. RIS download Bibtex download
  • Maiden A (2014) Method and apparatus for providing image data. US8917393 Appl. 23 Dec 2014. RIS download Bibtex download
  • McWilliam RP, Maiden A, Johnson S, Purvis A, Ivey PA, Seed NL & Williams GL () Holographic Lithography. GB2419501 (UK). Appl. 01 Jan 1970. RIS download Bibtex download
Teaching activities
  • EE335 (integrated electronics)
  • EEE6231 (optical imaging systems)
  • Postgraduate Research Admissions Tutor
Research students
Student Degree Status Primary/Secondary
Cao S PhD Graduated Secondary