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

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

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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.

Item Type:Articles
Additional Information:This work was supported by the UK Engineering and Physical Sciences Research Council (grant number EP/L025620/1).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gibson, Dr Graham and Padgett, Professor Miles
Authors: Liao, Z., Sinjab, F., Gibson, G., Padgett, M., and Notingher, I.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN:1094-4087
ISSN (Online):1094-4087
Copyright Holders:Copyright © 2016 OSA
First Published:First published in Optics Express 24(12): 12701-12702
Publisher Policy:Reproduced under a Creative Commons License

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