Photonics Research, Volume. 8, Issue 9, 1441(2020)
Synchronous nanoscale topographic and chemical mapping by differential-confocal controlled Raman microscopy
Fig. 1. Laser beam focus. (a) The laser beam is focussed at O. (b) Cross section of the beam at positions A,
Fig. 2. Differential-confocal controlled Raman microscopy. (a) Schematic of DCCRM where PH is the pinhole, NPBS (
Fig. 3. Axial focusing resolution measurements. Result of axial focusing resolution measurement (a) in the differential confocal configuration and (b) in the confocal Raman configuration; (c) 3D profile of the standard grating. (d) Comparison of the cross-sectional profile obtained with DCCRM, with image restoration (SDCCRM) and with AFM of the standard grating in (c), in which the DCCRM profile was extracted from data marked by the red arrow in (c).
Fig. 4. Antidrift measurements using our custom-made grating sample to perform Raman scanning in CRM and DCCRM modes. (a) Antidrift measurement in CRM mode, measured as the normalized Raman intensity with a
Fig. 5. Topographic imaging and Raman mapping of the DCCRM system. (a) Photographic microscopic image; (b) topographic image; (c) single Raman spectrum; (d) distribution of material composition map; (e) shift of the Raman peak map; and (f) a topographic image (in
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Han Cui, Yun Wang, Lirong Qiu, Shucheng Li, Jonathan M. Cooper, Weiqian Zhao. Synchronous nanoscale topographic and chemical mapping by differential-confocal controlled Raman microscopy[J]. Photonics Research, 2020, 8(9): 1441
Category: Instrumentation and Measurements
Received: Apr. 6, 2020
Accepted: Jul. 6, 2020
Published Online: Aug. 18, 2020
The Author Email: Weiqian Zhao (zwq669@126.com)