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Title: Hyper-Rayleigh scattering and hyper-Raman scattering of dye-adsorbed silver nanoparticles induced by a focused continuous-wave near-infrared laser

Abstract

We report that hyper-Rayleigh scattering, surface-enhanced hyper-Raman scattering, and two-photon excited luminescence occur intermittently by focusing a continuous-wave near-infrared (cw-NIR) laser into a colloidal silver solution including rhodamine 6G (R6G) and sodium chloride (NaCl). On the other hand, continuous hyper-Rayleigh scattering is observed from colloidal silver free from R6G and NaCl, demonstrating that hyper-Raman scattering and two-photon excited luminescence are attributed to R6G and their intermittent features are dependent on the colloidal dispersion. These results suggest that the cw-NIR laser has three roles; the source of the nonlinear response, optical trapping of nanoparticles, and making nanoparticle aggregates possessing the high activity for the nonlinear response.

Authors:
; ; ; ;  [1];  [2]
  1. Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
20778695
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 88; Journal Issue: 8; Other Information: DOI: 10.1063/1.2172733; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COLLOIDS; FOCUSING; NANOSTRUCTURES; NONLINEAR PROBLEMS; PARTICLES; PHOTOLUMINESCENCE; PHOTONS; RAMAN EFFECT; RAYLEIGH SCATTERING; RHODAMINES; SILVER; SODIUM CHLORIDES; SOLUTIONS; TRAPPING

Citation Formats

Itoh, Tamitake, Ozaki, Yukihiro, Yoshikawa, Hiroyuki, Ihama, Takashi, Masuhara, Hiroshi, and Department of Applied Physics and Frontier Research Center, Osaka University, Suita, Osaka 565-0871. Hyper-Rayleigh scattering and hyper-Raman scattering of dye-adsorbed silver nanoparticles induced by a focused continuous-wave near-infrared laser. United States: N. p., 2006. Web. doi:10.1063/1.2172733.
Itoh, Tamitake, Ozaki, Yukihiro, Yoshikawa, Hiroyuki, Ihama, Takashi, Masuhara, Hiroshi, & Department of Applied Physics and Frontier Research Center, Osaka University, Suita, Osaka 565-0871. Hyper-Rayleigh scattering and hyper-Raman scattering of dye-adsorbed silver nanoparticles induced by a focused continuous-wave near-infrared laser. United States. doi:10.1063/1.2172733.
Itoh, Tamitake, Ozaki, Yukihiro, Yoshikawa, Hiroyuki, Ihama, Takashi, Masuhara, Hiroshi, and Department of Applied Physics and Frontier Research Center, Osaka University, Suita, Osaka 565-0871. Mon . "Hyper-Rayleigh scattering and hyper-Raman scattering of dye-adsorbed silver nanoparticles induced by a focused continuous-wave near-infrared laser". United States. doi:10.1063/1.2172733.
@article{osti_20778695,
title = {Hyper-Rayleigh scattering and hyper-Raman scattering of dye-adsorbed silver nanoparticles induced by a focused continuous-wave near-infrared laser},
author = {Itoh, Tamitake and Ozaki, Yukihiro and Yoshikawa, Hiroyuki and Ihama, Takashi and Masuhara, Hiroshi and Department of Applied Physics and Frontier Research Center, Osaka University, Suita, Osaka 565-0871},
abstractNote = {We report that hyper-Rayleigh scattering, surface-enhanced hyper-Raman scattering, and two-photon excited luminescence occur intermittently by focusing a continuous-wave near-infrared (cw-NIR) laser into a colloidal silver solution including rhodamine 6G (R6G) and sodium chloride (NaCl). On the other hand, continuous hyper-Rayleigh scattering is observed from colloidal silver free from R6G and NaCl, demonstrating that hyper-Raman scattering and two-photon excited luminescence are attributed to R6G and their intermittent features are dependent on the colloidal dispersion. These results suggest that the cw-NIR laser has three roles; the source of the nonlinear response, optical trapping of nanoparticles, and making nanoparticle aggregates possessing the high activity for the nonlinear response.},
doi = {10.1063/1.2172733},
journal = {Applied Physics Letters},
number = 8,
volume = 88,
place = {United States},
year = {Mon Feb 20 00:00:00 EST 2006},
month = {Mon Feb 20 00:00:00 EST 2006}
}
  • Passive mode locking of a cw Rhodamine 700 dye laser is reported for the first time to our knowledge. By using two saturable absorber dyes, DOTCI and HITCI, continuous-output trains of subpicosecond pulses have been obtained in the 727--740- and 762--778-nm spectral regions, respectively. By the addition of a fast-recovery-time dye (DCI) to the DOTCI saturable absorber, pulses as short as 350 fsec at 740 nm have been generated.
  • The passive mode locking of an argon-ion-pumped energy-transfer cw dye laser operating in the near infrared is reported. The dye 1,1'-diethyl-4,4'-carbocyanine iodide and 1,1'-diethyl-2,2'-dicarbocyanine iodide were used separately to mode lock a gain medium comprising the dyes DCM and Rhodamine 700. Subpicosecond pulses were generated from 732 to 761 nm in a simple linear cavity, and pulses as short as 110 fsec were obtained from a colliding-pulse mode-locked ring cavity that was tuned between 742 and 754 nm.
  • Passive mode locking of a cw Rhodamine 700 dye laser is reported for the first time to our knowledge. By using two saturable absorber dyes, DOTCI and HITCI, continuous-output trains of subpicosecond pulses have been obtained in the 727--740- and 762--778-nm spectral regions, respectively. By the addition of a fast-recovery-time dye (DCI) to the DOTCI saturable absorber, pulses as short as 350 fsec at 740 nm have been generated.
  • The first reported use of a rhodamine-dye laser to generate tunable high-power picosecond pulses in the vibrational infrared is described. By using stimulated electronic Raman scattering from the 6s--5d transition in a superheated cesium vapor, we have shifted 1-psec pulses from an amplified rhodamine-dye laser (568--590 nm) to 3040--2320 cm/sup -1/ (3.3--4.3 ..mu..m). Somewhat longer pulses have been shifted to 1950 cm/sup -1/ (5.1 ..mu..m). Peak infrared energies of 11 ..mu..J, representing a quantum efficiency of 4.6%, were obtained at a 10-Hz repetition rate. Tuning to longer wavelengths with short pulses is limited by nonlinear processes but should be possiblemore » by further reductions of cesium dimer effects.« less
  • Surface-enhanced hyper-Raman scattering by pyridine was observed in aqueous silver citrate sols. Surface enhancement factors of several pyridine vibrations were measured and range from 10{sup 3} to 10{sup 6}. The strongest enhancements were observed in the totally symmetric vibrations {nu}{sub 12}, {nu}{sub 1}, {nu}{sub 6e}, and {nu}{sub 8a} and the b{sub 2} vibration {nu}{sub 6b}. The surface enhancements observed are larger than predicted by electrodynamic theories of surface enhancement for simple spherical or spheriodal particles, but relative enhancements are consistent with electromagnetic surface enhancement selection rules for hyper-Raman scattering. Elastic incoherent scattering in Ag sols was observed at twice themore » laser frequency. The intensity of the elastic component was 10{sup 4} to 10{sup 6} times more intense than hyper-Rayleigh scattering from bulk pyridine and increased upon addition of pyridine to the silver sols.« less