dorsal/arxiv
View SchemaTemperature dependent anti-Stokes/Stokes ratios under Surface Enhanced Raman Scattering (SERS) conditions
| Authors | R. C. Maher, L. F. Cohen, J. C. Gallop, E. C. Le Ru, P. G. Etchegoin |
|---|---|
| Categories | |
| ArXiv ID | physics/0511074 |
| URL | https://arxiv.org/abs/physics/0511074 |
Abstract
We make systematic measurements of Raman anti-Stokes/Stokes (aS/S) ratios using two different laser excitations (514 and 633 nm) of rhodamine 6G (RH6G) on dried Ag colloids over a wide range of temperatures (100 to 350 K). We show that a temperature scan allows the separation of the contributions to the aS/S ratios from {\it resonance effects} and {\it heating/pumping}, thus decoupling the two main aspects of the problem. The temperature rise is found to be larger when employing the 633 nm laser. In addition, we find evidence for mode specific vibrational pumping at higher laser power densities. We analyze our results in the framework of ongoing discussion on laser heating/pumping under SERS conditions.
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"abstract": "We make systematic measurements of Raman anti-Stokes/Stokes (aS/S) ratios\nusing two different laser excitations (514 and 633 nm) of rhodamine 6G (RH6G)\non dried Ag colloids over a wide range of temperatures (100 to 350 K). We show\nthat a temperature scan allows the separation of the contributions to the aS/S\nratios from {\\it resonance effects} and {\\it heating/pumping}, thus decoupling\nthe two main aspects of the problem. The temperature rise is found to be larger\nwhen employing the 633 nm laser. In addition, we find evidence for mode\nspecific vibrational pumping at higher laser power densities. We analyze our\nresults in the framework of ongoing discussion on laser heating/pumping under\nSERS conditions.",
"arxiv_id": "physics/0511074",
"authors": [
"R. C. Maher",
"L. F. Cohen",
"J. C. Gallop",
"E. C. Le Ru",
"P. G. Etchegoin"
],
"categories": [
"physics.chem-ph"
],
"title": "Temperature dependent anti-Stokes/Stokes ratios under Surface Enhanced Raman Scattering (SERS) conditions",
"url": "https://arxiv.org/abs/physics/0511074"
},
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