Abstract

Encoding of spectral information onto monochrome imaging cameras is of interest for wavelength multiplexing and hyperspectral imaging applications. Here, the complex spatiospectral response of a disordered material is used to demonstrate retrieval of a number of discrete wavelengths over a wide spectral range. Strong, diffuse light scattering in a semiconductor nanowire mat is used to achieve a highly compact spectrometer of micrometer thickness, transforming different wavelengths into distinct speckle patterns with nanometer sensitivity. Spatial multiplexing is achieved through the use of a microlens array, allowing simultaneous imaging of many speckles, ultimately limited by the size of the diffuse spot area. The performance of different information retrieval algorithms is compared. A compressive sensing algorithm exhibits efficient reconstruction capability in noisy environments and with only a few measurements.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Using a multimode fiber as a high-resolution, low-loss spectrometer

Brandon Redding and Hui Cao
Opt. Lett. 37(16) 3384-3386 (2012)

Snapshot colored compressive spectral imager

Claudia V. Correa, Henry Arguello, and Gonzalo R. Arce
J. Opt. Soc. Am. A 32(10) 1754-1763 (2015)

Computational integral field spectroscopy with diverse imaging

Maciej Baranski, Shakil Rehman, Sanathanan S. Muttikulangara, George Barbastathis, and Jianmin Miao
J. Opt. Soc. Am. A 34(9) 1711-1719 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription