On-chip Raman spectrometers using narrow band filter array combined with CMOS image sensorsopen access
- Authors
- Park, Yeonsang; Kim, Un Jeong; Lee, Suyeon; Kim, Hyochul; Kim, Jineum; Ma, Hyunjun; Son, Hyungbin; Yoon, Young Zoon; Lee, Jae-soong; Park, Minsu; Choo, Hyuck; Park, Q.-Han; Roh, Young-Geun
- Issue Date
- Apr-2023
- Publisher
- Elsevier B.V.
- Keywords
- CMOS image sensor; Miniaturization; Raman spectrometer; Reconstruction
- Citation
- Sensors and Actuators B: Chemical, v.381
- Journal Title
- Sensors and Actuators B: Chemical
- Volume
- 381
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/66825
- DOI
- 10.1016/j.snb.2023.133442
- ISSN
- 0925-4005
0925-4005
- Abstract
- Recent advancements in nanotechnology raise the feasibility of a miniaturized, portable Raman spectrometer with promising applications such as material identification, food safety monitoring, and health care. Miniaturizing Raman spectrometers has remained a challenge owing to the inevitable weakness of Raman signals and the conflict between small size and spectral resolution. In this study, we present a portable mini-Raman spectrometer comprising a complementary metal–oxide semiconductor (CMOS) image sensor (CIS) integrated with an array of filter sets, a confocal probe, and a laser diode that successfully meets the miniaturization challenge. We also report successful measurement of Raman spectra using the CIS-based mini-spectrometer, measuring cyclohexane liquid, tylenol pills, and vitamin-C pills with high spectral resolution. Our mini-Raman spectrometer, which can measure Raman signals in a two-dimensional (2D) image format in a single-shot, can be embedded into commercial mobile phones and transformed into a promising Raman camera.
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