中国物理B ›› 2021, Vol. 30 ›› Issue (9): 97807-097807.doi: 10.1088/1674-1056/ac1f06

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Signal-to-noise ratio of Raman signal measured by multichannel detectors

Xue-Lu Liu(刘雪璐)1, Yu-Chen Leng(冷宇辰)1,2, Miao-Ling Lin(林妙玲)1, Xin Cong(从鑫)1,2, and Ping-Heng Tan(谭平恒)1,2,†   

  1. 1 State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    2 Center of Materials Science and Optoelectronics Engineering&CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2021-06-08 修回日期:2021-08-01 接受日期:2021-08-19 出版日期:2021-08-19 发布日期:2021-08-31
  • 通讯作者: Ping-Heng Tan E-mail:phtan@semi.ac.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301204), the National Natural Science Foundation of China (Grant No. 11874350), and Key Research Program of the Chinese Academy of Sciences (Grant Nos. XDPB22 and ZDBS-LY-SLH004).

Signal-to-noise ratio of Raman signal measured by multichannel detectors

Xue-Lu Liu(刘雪璐)1, Yu-Chen Leng(冷宇辰)1,2, Miao-Ling Lin(林妙玲)1, Xin Cong(从鑫)1,2, and Ping-Heng Tan(谭平恒)1,2,†   

  1. 1 State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    2 Center of Materials Science and Optoelectronics Engineering&CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2021-06-08 Revised:2021-08-01 Accepted:2021-08-19 Online:2021-08-19 Published:2021-08-31
  • Contact: Ping-Heng Tan E-mail:phtan@semi.ac.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301204), the National Natural Science Foundation of China (Grant No. 11874350), and Key Research Program of the Chinese Academy of Sciences (Grant Nos. XDPB22 and ZDBS-LY-SLH004).

摘要: Raman spectroscopy has been widely used to characterize the physical properties of two-dimensional materials (2DMs). The signal-to-noise ratio (SNR or S/N ratio) of Raman signal usually serves as an important indicator to evaluate the instrumental performance rather than Raman intensity itself. Multichannel detectors with outstanding sensitivity, rapid acquisition speed and low noise level have been widely equipped in Raman instruments for the measurement of Raman signal. In this mini-review, we first introduce the recent advances of Raman spectroscopy of 2DMs. Then we take the most commonly used CCD detector and IGA array detector as examples to overview the various noise sources in Raman measurements and analyze their potential influences on SNR of Raman signal in experiments. This overview can contribute to a better understanding on the SNR of Raman signal and the performance of multichannel detector for numerous researchers and instrumental design for industry, as well as offer practical strategies for improving spectral quality in routine measurement.

关键词: multichannel detectors, signal-to-noise ratio, dark noise, shot noise

Abstract: Raman spectroscopy has been widely used to characterize the physical properties of two-dimensional materials (2DMs). The signal-to-noise ratio (SNR or S/N ratio) of Raman signal usually serves as an important indicator to evaluate the instrumental performance rather than Raman intensity itself. Multichannel detectors with outstanding sensitivity, rapid acquisition speed and low noise level have been widely equipped in Raman instruments for the measurement of Raman signal. In this mini-review, we first introduce the recent advances of Raman spectroscopy of 2DMs. Then we take the most commonly used CCD detector and IGA array detector as examples to overview the various noise sources in Raman measurements and analyze their potential influences on SNR of Raman signal in experiments. This overview can contribute to a better understanding on the SNR of Raman signal and the performance of multichannel detector for numerous researchers and instrumental design for industry, as well as offer practical strategies for improving spectral quality in routine measurement.

Key words: multichannel detectors, signal-to-noise ratio, dark noise, shot noise

中图分类号:  (Infrared and Raman spectra)

  • 78.30.-j
43.50.Yw (Instrumentation and techniques for noise measurement and analysis) 85.60.Gz (Photodetectors (including infrared and CCD detectors)) 43.60.Cg (Statistical properties of signals and noise)