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

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: Aug 7, 2018
• 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
• Contract Date: Aug 7, 2018