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- W3175221468 abstract "The detection of peaks shifts in Raman spectroscopy enables a fingerprint reconstruction to discriminate among molecules with neither labelling nor sample preparation. Time-resolved Raman spectroscopy is an effective technique to reject the strong fluorescence background that profits from the time scale difference in the two responses: Raman photons are scattered almost instantaneously while fluorescence shows a nanoseconds time constant decay. The combination of short laser pulses with time-gated detectors enables the collection of only those photons synchronous with the pulse, thus rejecting fluorescent ones. This review addresses time-gating issues from the sensor standpoint and identifies single photon avalanche diode (SPAD) arrays as the most suitable single-photon detectors to be rapidly and precisely time-gated without bulky, complex, or expensive setups. At first, we discuss the requirements for ideal Raman SPAD arrays, particularly focusing on the design guidelines for optimized on-chip processing electronics. Then we present some existing SPAD-based architectures, featuring specific operation modes which can be usefully exploited for Raman spectroscopy. Finally, we highlight key aspects for future ultrafast Raman platforms and highly integrated sensors capable of undistorted identification of Raman peaks across many pixels." @default.
- W3175221468 created "2021-07-05" @default.
- W3175221468 creator A5007932683 @default.
- W3175221468 creator A5026619926 @default.
- W3175221468 date "2021-06-23" @default.
- W3175221468 modified "2023-09-29" @default.
- W3175221468 title "Single Photon Avalanche Diode Arrays for Time-Resolved Raman Spectroscopy" @default.
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- W3175221468 doi "https://doi.org/10.3390/s21134287" @default.
- W3175221468 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8272195" @default.
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- W3175221468 hasPublicationYear "2021" @default.
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