Please use this identifier to cite or link to this item:
https://doi.org/10.1364/OE.22.009611
DC Field | Value | |
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dc.title | Chirped time-resolved CARS microscopy with square-pulse excitation | |
dc.contributor.author | Upputuri, P.K. | |
dc.contributor.author | Gong, L. | |
dc.contributor.author | Wang, H. | |
dc.date.accessioned | 2014-10-16T09:18:09Z | |
dc.date.available | 2014-10-16T09:18:09Z | |
dc.date.issued | 2014-04-21 | |
dc.identifier.citation | Upputuri, P.K., Gong, L., Wang, H. (2014-04-21). Chirped time-resolved CARS microscopy with square-pulse excitation. Optics Express 22 (8) : 9611-9626. ScholarBank@NUS Repository. https://doi.org/10.1364/OE.22.009611 | |
dc.identifier.issn | 10944087 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/95988 | |
dc.description.abstract | Time-resolved coherent anti-Stokes Raman scattering (T-CARS) microscopy is a technique known for suppressing non-resonant background by utilizing the different temporal responses of virtual electronic transitions and Raman transitions. However, the previous use of femtosecond excitations in T-CARS microscopy has led to low spectral resolution and difficulty in selectively exciting a single Raman band. Here, we report an improved T-CARS imaging technique with chirped pump and Stokes excitations, and the Stokes pulses were shaped into square pulses. Using a femtosecond probe, we acquired T-CARS images with a high spectral resolution, suppressed non-resonant background, and high resonant signal level. We experimentally demonstrated the selective excitation of two close Raman bands of polystyrene at 1005 cm-1 and 1035 cm-1 using our technique; conventional T-CARS would inevitably excite them both with little selectivity. Our novel technique could become an ideal method for high-sensitivity, background-free imaging of single Raman bands for a wide variety of samples.©2013 Optical Society of America. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1364/OE.22.009611 | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | PHYSICS | |
dc.description.doi | 10.1364/OE.22.009611 | |
dc.description.sourcetitle | Optics Express | |
dc.description.volume | 22 | |
dc.description.issue | 8 | |
dc.description.page | 9611-9626 | |
dc.identifier.isiut | 000335902200078 | |
Appears in Collections: | Staff Publications |
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