Maitreyee Roy

Senior Lecturer and Co- Director of the Optics and Radiometry Laboratory
Senior Lecturer

Dr Roy was awarded a PhD in Physical Optics from School of Physics at the University of Sydney. Her PhD research was focused on the fundamental principle of “Geometric Phase” in optics and its application for 3D imaging for biological and non-biological samples. One of her major contributions in this area was to demonstrate achromatic nature of geometric phase, which has opened up new insights into broadband interferometry with applications ranging from biological systems (Optical Coherence Tomography), electronics (Semiconductor industry) to astronomy (Stellar Interferometry).

Prior to joining UNSW in 2015, she worked in multidisciplinary research projects in government and academic institutions including the School of Physics and Australian Key Centre for Microscopy & Microanalysis at the University of Sydney and National Measurement Institute, Australia (NMIA). While at NMIA as a Research Scientist, she conducted and led various Optical Standards and Nano-metrology projects focusing on establishing and maintaining the capabilities underpinning the delivery of measurement services for industry, government and to the research community.

She has also worked in several international research labs: Charles Fabry Laboratory, University d’ Orsay, France; Department of Applied Physics, Osaka University; National Measurement & Standards Laboratory, NRC, Canada; Department of Optics, National Institute of Astrophysics, Optics and Electronica, Mexico and Mechanical Engineering Laboratory, Tsukuba, Japan.  

Dr Roy holds numerous memberships with professional societies nationally and internationally, notably a member of Optical Society of Australia, a Fellow of Optical Society of America, Member of the International Society for Optical Engineering, a member of Optical Society of India, a member of Australian Microscopy and Microanalysis Society and an Australian Standards Committee member for eye and face protection standards.

 

RESEARCH

  • Visualizing tear film using Quantum dots
  • Automated detection of ocular diseases with Artificial Intelligence.
  • 3D reconstruction and visualisation of ocular disease model from OCT images
  • The effect of blue-blocking lenses on visual and non-visual functions.
  • Development of novel instrumentation and imaging technology for rapid, sensitive, non-contact, non-invasive methods for high-resolution three-dimensional imaging for biomedical applications which incorporate the Full-Field optical coherence microscopy based on liquid crystal geometric phase-shifting technology coupled with fluorescence microscopy.

TEACHING & OUTREACH

Courses I teach and coordinate

  • VISN1111 - Geometrical and Physical Optics
  • VISN1221 - Visual Optics
  • OPTM 3201- Ocular Imaging & Applied Vision Science

PROFESSIONAL AFFILIATIONS

  • Fellow of the Optical Society of America
  • Member of the Australian Microscopy and Microanalysis Society Inc
  • Member of the Australian Optical Society
  • Member of the Metrological Society Australia
  • Member of the Optical Society of India
  • Member of the International Society for Optical Engineering (SPIE)
  • Australian Standards Committee, Eye & Face Protection

AWARDS & ACHIEVEMENTS

  • NMI World Metrology Day Outstanding Achievement Awards, 2013- NETs Team: For an outstandingly successful program delivering world-class measurement standards and services and for active and effective engagement with a wide range of stakeholders to focus and apply these capabilities                                          
  • NMI World Metrology Day Outstanding Achievement Awards, 2011- Optical Standards Team: Excellent work in satisfying optical measurement requirements of a major strategic client, Department of Defence
  • ProSciTech Trans-Tasman Award,2006, For significant research using microscopy or microanalysis, especially work for lasting value to people/ or the environment, Australian Microscopy and Microanalysis Society
  • Australian Academy of Science: France-Australia Science Innovation Collaboration Program, 2007 
  • Denison travel fellowship, School of Physics, University of Sydney,2006
  • JSPS invitation fellowship (Japan Society for Promotion of Science), 2004
  • Australian Academy of Science travel fellowship, 2003, “Scientific visits to the United States of America, Canada and Mexico” scheme
  • AIST Fellow (Agency of Industrial Science and Technology), Japan, 1999
  • Daimler-Benz Award, 1999- Best overall papers by the collaborative team (Japanese) presented at 31st International Symposium on Automotive Technology & Automation, Germany

 

Research Groups

Research Topics

  • Automated detection of ocular diseases with Artificial Intelligence
  • Blue light blocking lenses, effects on visual and non-visual systems
  • Functionalised nanoparticles as contrast agents for bio-imaging
  • Optical coherence microscopy for ultrahigh-resolution 3D imaging

Publications

Book Chapters
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Sheppard CJR; Gan X; Gu M; Roy M, 2006, 'Signal-to-noise ratio in confocal microscopes', in Handbook of Biological Confocal Microscopy: Third Edition, pp. 442 - 452, http://dx.doi.org/10.1007/978-0-387-45524-2_22
2006
Conference Papers
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Roy M; Zheng W; Sheppard CJR, 2018, 'Rapid full-field optical coherence tomography using geometric phase ferroelectric liquid crystal technology', in Optics InfoBase Conference Papers, http://dx.doi.org/10.1364/ISA.2018.IM3B.2
2018
Roy M; Sarwat S; O'Mara P; Almaimani M; Tilley R; Gooding J; Willcox M; Stapleton F, 2018, 'Imaging of tear film lipids using quantum dots', in Optics InfoBase Conference Papers, http://dx.doi.org/10.1364/3D.2018.JW4A.18
2018
Roy M, 2017, 'Is colour discrimination changed by wearing “blue blocking lenses”?', in Is colour discrimination changed by wearing “blue blocking lenses”?, ASIA ARVO, Brisbane, presented at ASIA ARVO, Brisbane, 01 April 2017 - 07 April 2017
2017
Jämting AK; Roy M; Catchpoole HJ; Lawn M; Babic B; Coleman VA; Herrmann J, 2013, 'The influence of technique on the measured particle size distribution of complex nanoparticle systems', in Technical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013, pp. 163 - 166
2013
Roy M; Manson P; Thorvaldson ED; Atkinson EG; Ballico MJ, 2011, 'Aperture area metrology using confocal laser beam scanning technique', in Optics InfoBase Conference Papers, pp. 1664 - 1667
2011
Roy M; Manson P; Thorvaldson ED; Atkinson EG; Ballico MJ, 2011, 'Aperture area metrology using confocal laser beam scanning technique', in 2011 Int. Quantum Electron. Conf., IQEC 2011 and Conf. Lasers and Electro-Optics, CLEO Pacific Rim 2011 Incorporating the Australasian Conf. Optics, Lasers and Spectroscopy and the Australian Conf., pp. 1664 - 1666, http://dx.doi.org/10.1109/IQEC-CLEO.2011.6193962
2011
Coleman VA; Jämting AK; Catchpoole HJ; Roy M; Herrmann J, 2011, 'Nanoparticles and metrology: A comparison of methods for the determination of particle size distributions', in Proceedings of SPIE - The International Society for Optical Engineering, http://dx.doi.org/10.1117/12.894297
2011
Sheppard CJR; Roy M; Svahn P, 2000, 'Low-coherence interference microscopy at high numerical apertures', in Proceedings of SPIE - The International Society for Optical Engineering, pp. 57 - 60
2000
Matsuda K; Roy M; Fekete PW; Eiju T; Sheppard CJR; O'Byrne JW, 1998, 'A novel method for beam collimation using multiple beam shearing interferometry', in Proceedings of SPIE - The International Society for Optical Engineering, pp. 2 - 8, http://dx.doi.org/10.1117/12.304405
1998
Hariharan P; Roy M, 1996, 'Achromatic phase-shifting for polarization interferometry', in Proceedings of SPIE - The International Society for Optical Engineering, pp. 100 - 106, http://dx.doi.org/10.1117/12.276294
1996
Roy M; Hariharan P, 1995, 'White-light geometric phase interferometer for surface profiling', in Proceedings of SPIE - The International Society for Optical Engineering, pp. 64 - 72
1995
Sheppard CJ; Quartel JC; Roy M, 1995, 'Scattering and imaging of random media', in Proceedings of SPIE - The International Society for Optical Engineering, pp. 13 - 19
1995
Hariharan P; Roy M; Robinson PA; O'Byrne JW, 1993, 'Geometric phase in optics: observations at the classical and quantum limits', in Proceedings of SPIE - The International Society for Optical Engineering, pp. 508 - 512
1993
Sheppard CJ; Gu M; Roy M, 1992, 'Signal strength and its effects on processing of confocal images', in Proceedings of SPIE - The International Society for Optical Engineering, pp. 243 - 249
1992
Conference Presentations
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Nguyen, N; Roy M, 2017, 'A laser multi-vergence optometer induces the accommodation of myopes', presented at Arvo-Asia, Brisbane, 05 February 2017 - 08 February 2017
2017
Journal articles
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Alzahrani HS; Khuu SK; Roy M, 2020, 'Modelling the effect of commercially available blue-blocking lenses on visual and non-visual functions', Clinical and Experimental Optometry, vol. 103, pp. 339 - 346, http://dx.doi.org/10.1111/cxo.12959
2020
Sarwat S; Stapleton F; Willcox M; Roy M, 2019, 'Quantum Dots in Ophthalmology: A Literature Review', Current Eye Research, vol. 44, pp. 1037 - 1046, http://dx.doi.org/10.1080/02713683.2019.1660793
2019
Matsuda K; Lopez JCA; Rehman S; Misawa M; Suzuki Y; Takeuchi A; Yasumoto M; Hibino K; Roy M; Hanayama R; Ishii K, 2018, 'Differential interference contrast microscopy for cells using hard x-ray holography', Applied Optics, vol. 57, pp. 4795 - 4801, http://dx.doi.org/10.1364/AO.57.004795
2018
Chekli L; Roy M; Tijing LD; Donner E; Lombi E; Shon HK, 2015, 'Agglomeration behaviour of titanium dioxide nanoparticles in river waters: A multi-method approach combining light scattering and field-flow fractionation techniques', Journal of Environmental Management, vol. 159, pp. 135 - 142, http://dx.doi.org/10.1016/j.jenvman.2015.05.011
2015
Chekli L; Phuntsho S; Roy M; Shon HK, 2013, 'Characterisation of Fe-oxide nanoparticles coated with humic acid and Suwannee River natural organic matter', Science of the Total Environment, vol. 461-462, pp. 19 - 27, http://dx.doi.org/10.1016/j.scitotenv.2013.04.083
2013
Chekli L; Phuntsho S; Roy M; Lombi E; Donner E; Shon HK, 2013, 'Assessing the aggregation behaviour of iron oxide nanoparticles under relevant environmental conditions using a multi-method approach', Water Research, vol. 47, pp. 4585 - 4599, http://dx.doi.org/10.1016/j.watres.2013.04.029
2013
Roy M; Schmit J; Hariharan P, 2009, 'White-light interference microscopy: Minimization of spurious diffraction effects by geometric phase-shifting', Optics Express, vol. 17, pp. 4495 - 4499, http://dx.doi.org/10.1364/OE.17.004495
2009
Hariharan P; Roy M, 2007, 'Improved pinhole spatial filter', Optics and Laser Technology, vol. 39, pp. 155 - 156, http://dx.doi.org/10.1016/j.optlastec.2005.04.002
2007
Roy M; Sheppard CJR; Cox G; Hariharan P, 2006, 'White-light interference microscopy: A way to obtain high lateral resolution over an extended range of heights', Optics Express, vol. 14, pp. 6788 - 6793, http://dx.doi.org/10.1364/OE.14.006788
2006
Cooper IJ; Roy M; Sheppard CJR, 2005, 'Focusing of pseudoradial polarized beams', Optics Express, vol. 13, pp. 1066 - 1071, http://dx.doi.org/10.1364/OPEX.13.001066
2005
Cooper IJ; Sheppard CJR; Roy M, 2005, 'The numerical integration of fundamental diffraction integrals for converging polarized spherical waves using a two-dimensional form of Simpson's 1/3 rule', Journal of Modern Optics, vol. 52, pp. 1123 - 1134, http://dx.doi.org/10.1080/09500340512331323439
2005
Hariharan P; Ciddor PE; Roy M, 2005, 'Improved switchable achromatic phase shifters, part 2', Optical Engineering, vol. 44, http://dx.doi.org/10.1117/1.2084587
2005
Roy M; Cox G; Hariharan P, 2005, 'Low-coherence interference microscopy with an improved switchable achromatic phase-shifter', Optics Express, vol. 13, pp. 9125 - 9130, http://dx.doi.org/10.1364/OPEX.13.009125
2005
Roy M; Cooper I; Moore P; Sheppard CJR; Hariharan P, 2005, 'White-light interference microscopy: Effects of multiple reflections within a surface film', Optics Express, vol. 13, pp. 164 - 170, http://dx.doi.org/10.1364/OPEX.13.000164
2005
Sheppard CJR; Roy M; Sharma MD, 2004, 'Image formation in low-coherence and confocal interference microscopes', Applied Optics, vol. 43, pp. 1493 - 1502, http://dx.doi.org/10.1364/AO.43.001493
2004
Roy M, 2004, 'Technique maps complex microsurfaces', Photonics Spectra, vol. 38, pp. 65 - 68
2004
Roy M; Sheppard CJR; Hariharan P, 2004, 'Low-coherence interference microscopy using a ferro-electric liquid crystal phase-modulator', Optics Express, vol. 12, pp. 2512 - 2516, http://dx.doi.org/10.1364/OPEX.12.002512
2004
Roy M; Svahn P; Cherel L; Sheppard CJR, 2002, 'Geometric phase-shifting for low-coherence interference microscopy', Optics and Lasers in Engineering, vol. 37, pp. 631 - 641, http://dx.doi.org/10.1016/S0143-8166(01)00146-4
2002
Matsuda K; Roy M; Eiju T; O’byrne JW; Sheppard CJR; Mazur E, 2002, 'Straightness measurements with a reflection confocal optical system-an experimental study', Applied Optics, vol. 41, pp. 3966 - 3970, http://dx.doi.org/10.1364/AO.41.003966
2002
Roy M; Svahn P; Sheppard CJR, 2001, 'Geometric phase low-coherence interference microscopy at high numerical apertures', Proceedings of SPIE - The International Society for Optical Engineering, vol. 4417, pp. 529 - 532, http://dx.doi.org/10.1117/12.441347
2001
Matsuda K; Eiju T; Roy M; O'Byrne JW; Fekete PW; Sheppard CJR, 1999, 'Straightness measurements using a reflection confocal optical system', Proceedings of SPIE - The International Society for Optical Engineering, vol. 3749, pp. 589 - 590
1999
Matsuda K; Roy M; O’byrne JW; Fekete PW; Eiju T; Sheppard CJR, 1999, 'Straightness measurements by use of a reflection confocal optical system', Applied Optics, vol. 38, pp. 5310 - 5318, http://dx.doi.org/10.1364/AO.38.005310
1999
Roy M; Cherel L; Sheppard CJR, 1999, 'Geometric phase coherence probe microscope for surface profiling', Proceedings of SPIE - The International Society for Optical Engineering, vol. 3749, pp. 462 - 463
1999
Sheppard CJR; Roy M, 1996, 'Total integrated scatter in the Kirchhoff approximation', Optik (Jena), vol. 103, pp. 42 - 44
1996
Hariharan P; Roy M, 1996, 'Achromatic phase-shifting for two-wavelength phase-stepping interferometry', Optics Communications, vol. 126, pp. 220 - 222, http://dx.doi.org/10.1016/0030-4018(96)00118-6
1996
Hariharan P; Roy M, 1996, 'Interferometric surface profiling with white light: Effects of surface films', Journal of Modern Optics, vol. 43, pp. 1797 - 1800, http://dx.doi.org/10.1080/09500349608232850
1996
Hariharan P; Roy M, 1995, 'White-light phase-stepping interferometry: Measurement of the fractional interference order', Journal of Modern Optics, vol. 42, pp. 2357 - 2360, http://dx.doi.org/10.1080/09500349514552051
1995
Hariharan P; Roy M, 1994, 'White-light phase-stepping interferometry for surface profiling', Journal of Modern Optics, vol. 41, pp. 2197 - 2201, http://dx.doi.org/10.1080/09500349414552041
1994
Hariharan P; Larkin KG; Roy M, 1994, 'The geometric phase: Interferometric observations with white light', Journal of Modern Optics, vol. 41, pp. 663 - 667, http://dx.doi.org/10.1080/09500349414550681
1994
Hariharan P; Roy M, 1993, 'The geometric phase in optical rotation', Journal of Modern Optics, vol. 40, pp. 1687 - 1690, http://dx.doi.org/10.1080/09500349314551701
1993
Hariharan P; Roy M; Robinson PA; O'byrne JW, 1993, 'The geometric phase observations at the single-photon level', Journal of Modern Optics, vol. 40, pp. 871 - 877, http://dx.doi.org/10.1080/09500349314550881
1993
Roy M; Sheppard CJR, 1993, 'Effects of image processing on the noise properties of confocal images', Micron, vol. 24, pp. 623 - 635, http://dx.doi.org/10.1016/0968-4328(93)90040-8
1993
Hariharan P; Roy M, 1992, 'A geometric-phase interferometer', Journal of Modern Optics, vol. 39, pp. 1811 - 1815, http://dx.doi.org/10.1080/09500349214551881
1992
Sheppard CJR; Gu M; Roy M, 1992, 'Signal‐to‐noise ratio in confocal microscope systems', Journal of Microscopy, vol. 168, pp. 209 - 218, http://dx.doi.org/10.1111/j.1365-2818.1992.tb03264.x
1992