Near-field and particle size effects in coherent Raman scattering
Nonlinear optical processes have been used for sensitive detection of chemicals, optical imaging and spectral analysis of small particles. We have developed an exact theoretical framework to study the angular dependence of coherent anti-Stokes Raman scattering (CARS) intensity in the near field and...
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| Format: | Article |
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EMW Publishing
2011
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| _version_ | 1825719461769904128 |
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| author | Ooi, Chong Heng Raymond |
| author_facet | Ooi, Chong Heng Raymond |
| author_sort | Ooi, Chong Heng Raymond |
| collection | UM |
| description | Nonlinear optical processes have been used for sensitive detection of chemicals, optical imaging and spectral analysis of small particles. We have developed an exact theoretical framework to study the angular dependence of coherent anti-Stokes Raman scattering (CARS) intensity in the near field and far field for nanoparticle and microparticle. We obtain exact analytical solution for the CARS signal valid for arbitrary detection distance. Interesting angular dependence is found for nanoparticle, especially with near field detection. The study includes the erects of focused lasers and particle size on the CARS intensity distribution. We find that the detection distance and particle size do not affect the spectroscopic peaks of CARS. However, interference of reflected waves in nanoparticle can produce a dip in the backscattered spectrum. |
| first_indexed | 2024-03-06T05:20:06Z |
| format | Article |
| id | um.eprints-7968 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:20:06Z |
| publishDate | 2011 |
| publisher | EMW Publishing |
| record_format | dspace |
| spelling | um.eprints-79682019-10-09T07:49:42Z http://eprints.um.edu.my/7968/ Near-field and particle size effects in coherent Raman scattering Ooi, Chong Heng Raymond QC Physics Nonlinear optical processes have been used for sensitive detection of chemicals, optical imaging and spectral analysis of small particles. We have developed an exact theoretical framework to study the angular dependence of coherent anti-Stokes Raman scattering (CARS) intensity in the near field and far field for nanoparticle and microparticle. We obtain exact analytical solution for the CARS signal valid for arbitrary detection distance. Interesting angular dependence is found for nanoparticle, especially with near field detection. The study includes the erects of focused lasers and particle size on the CARS intensity distribution. We find that the detection distance and particle size do not affect the spectroscopic peaks of CARS. However, interference of reflected waves in nanoparticle can produce a dip in the backscattered spectrum. EMW Publishing 2011 Article PeerReviewed Ooi, Chong Heng Raymond (2011) Near-field and particle size effects in coherent Raman scattering. Progress In Electromagnetics Research, 117. pp. 479-494. ISSN 1070-4698, DOI https://doi.org/10.2528/pier11051206 <https://doi.org/10.2528/pier11051206>. https://doi.org/10.2528/pier11051206 doi:10.2528/pier11051206 |
| spellingShingle | QC Physics Ooi, Chong Heng Raymond Near-field and particle size effects in coherent Raman scattering |
| title | Near-field and particle size effects in coherent Raman scattering |
| title_full | Near-field and particle size effects in coherent Raman scattering |
| title_fullStr | Near-field and particle size effects in coherent Raman scattering |
| title_full_unstemmed | Near-field and particle size effects in coherent Raman scattering |
| title_short | Near-field and particle size effects in coherent Raman scattering |
| title_sort | near field and particle size effects in coherent raman scattering |
| topic | QC Physics |
| work_keys_str_mv | AT ooichonghengraymond nearfieldandparticlesizeeffectsincoherentramanscattering |