Shah, Y. D. et al. (2020) Ultralow-light-level color image reconstruction using high-efficiency plasmonic metasurface mosaic filters. Optica, 7(6), pp. 632-639. (doi: 10.1364/OPTICA.389905)
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Abstract
As single-photon imaging becomes progressively more commonplace in sensing applications such as low-light-level imaging, three-dimensional profiling, and fluorescence imaging, there exist a number of fields where multispectral information can also be exploited, e.g., in environmental monitoring and target identification. We have fabricated a high-transmittance mosaic filter array, where each optical filter was composed of a plasmonic metasurface fabricated in a single lithographic step. This plasmonic metasurface design utilized an array of elliptical and circular nanoholes, which produced enhanced optical coupling between multiple plasmonic interactions. The resulting metasurfaces produced narrow bandpass filters for blue, green, and red light with peak transmission efficiencies of 79%, 75%, and 68%, respectively. After the three metasurface filter designs were arranged in a 64×64 format random mosaic pattern, this mosaic filter was directly integrated onto a CMOS single-photon avalanche diode detector array. Color images were then reconstructed at light levels as low as approximately 5 photons per pixel, on average, via the simultaneous acquisition of low-photon multispectral data using both three-color active laser illumination and a broadband white-light illumination source.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Cumming, Professor David and Annese, Dr Valerio and Kenney, Dr Mitchell Guy and Accarino, Mr Claudio and Faccio, Professor Daniele and Shah, Dr Yash Diptesh and Hao, Miss Danni and Grant, Dr James |
| Authors: | Shah, Y. D., Connolly, P. W.R., Grant, J. P., Hao, D., Accarino, C., Ren, X., Kenney, M., Annese, V., Rew, K. G., Greener, Z. M., Altmann, Y., Faccio, D., Buller, G. S., and Cumming, D. R.S. |
| College/School: | College of Science and Engineering > School of Engineering College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Optica |
| Publisher: | The Optical Society |
| ISSN: | 2334-2536 |
| ISSN (Online): | 2334-2536 |
| Copyright Holders: | Copyright © 2020 Optical Society of America |
| First Published: | First published in Optica 7(6):632-639 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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