Diffractive optics approach towards subwavelength pixels

Bo Fan; Sandeep Inampudi; Viktor A. Podolskiy

doi:10.1117/12.2303917

8 May 2018 Diffractive optics approach towards subwavelength pixels

Bo Fan, Sandeep Inampudi, Viktor A. Podolskiy

Proceedings Volume 10639, Micro- and Nanotechnology Sensors, Systems, and Applications X; 1063908 (2018) https://doi.org/10.1117/12.2303917
Event: SPIE Defense + Security, 2018, Orlando, FL, United States

Abstract

Pixel size in cameras and other refractive imaging devices is typically limited by the free-space diffraction. However, a vast majority of semiconductor-based detectors are based on materials with substantially high refractive index. We demonstrate that diffractive optics can be used to take advantage of this high refractive index to reduce effective pixel size of the sensors below free-space diffraction limit. At the same time, diffractive systems encode both amplitude and phase information about the incoming beam into multiple pixels, offering the platform for noise-tolerant imaging with dynamical refocusing. We explore the opportunities opened by high index diffractive optics to reduce sensor size and increase signalto- noise ratio of imaging structures.

Citation Download Citation

Bo Fan, Sandeep Inampudi, and Viktor A. Podolskiy "Diffractive optics approach towards subwavelength pixels", Proc. SPIE 10639, Micro- and Nanotechnology Sensors, Systems, and Applications X, 1063908 (8 May 2018); https://doi.org/10.1117/12.2303917

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