On-chip Raman spectrometers using narrow band filter array combined with CMOS image sensors

Yeonsang Park, Un Jeong Kim, Suyeon Lee, Hyochul Kim, Jineun Kim, Hyunjun Ma, Hyungbin Son, Young Zoon Yoon, Jae soong Lee, Minsu Park, Hyuck Choo, Q. Han Park, Young Geun Roh

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number133442
JournalSensors and Actuators, B: Chemical
Publication statusPublished - 2023 Apr 15


  • CMOS image sensor
  • Miniaturization
  • Raman spectrometer
  • Reconstruction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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