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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 faris.sinjab@nottingham.ac.uk

Graham Gibson

Miles Padgett

Ioan Notingher ioan.notingher@nottingham.ac.uk



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.

Journal Article Type Article
Publication Date Jun 13, 2016
Journal Optics Express
Electronic ISSN 1094-4087
Publisher Optical Society of America
Peer Reviewed Peer Reviewed
Volume 24
Issue 12
Pages 12701-12712
APA6 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
DOI https://doi.org/10.1364/OE.24.012701
Publisher URL https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-12-12701
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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