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DMD-based software-configurable spatially-offset Raman spectroscopy for spectral depth-profiling of optically turbid samples

Liao, Zhiyu; Sinjab, Faris; Gibson, Graham; Padgett, Miles; Notingher, Ioan

Authors

Zhiyu Liao

Faris Sinjab

Graham Gibson

Miles Padgett



Abstract

Spectral depth-profiling of optically turbid samples is of high interest to a broad range of applications. We present a method for measuring spatially-offset Raman spectroscopy (SORS) over a range of length scales by incorporating a digital micro-mirror device (DMD) into a sample-conjugate plane in the detection optical path. The DMD can be arbitrarily programmed to collect/reject light at spatial positions in the 2D sample-conjugate plane, allowing spatially offset Raman measurements. We demonstrate several detection geometries, including annular and simultaneous multi-offset modalities, for both macro- and micro-SORS measurements, all on the same instrument. Compared to other SORS modalities, DMD-based SORS provides more flexibility with only minimal additional experimental complexity for subsurface Raman collection.

Citation

Liao, Z., Sinjab, F., Gibson, G., Padgett, M., & Notingher, I. (2016). DMD-based software-configurable spatially-offset Raman spectroscopy for spectral depth-profiling of optically turbid samples. Optics Express, 24(12), 12701-12712. https://doi.org/10.1364/OE.24.012701

Journal Article Type Article
Acceptance Date Mar 20, 2016
Publication Date Jun 13, 2016
Deposit Date Apr 29, 2016
Publicly Available Date Mar 29, 2024
Journal Optics Express
Electronic ISSN 1094-4087
Publisher Optical Society of America
Peer Reviewed Peer Reviewed
Volume 24
Issue 12
Pages 12701-12712
DOI https://doi.org/10.1364/OE.24.012701
Public URL https://nottingham-repository.worktribe.com/output/779797
Publisher URL https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-12-12701

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