Record Details

Supercontinuum generation in water doped with gold nanoparticles

DSpace at IIT Bombay

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Title Supercontinuum generation in water doped with gold nanoparticles
 
Creator VASA, P
SINGH, M
BERNARD, R
DHARMADHIKARI, AK
DHARMADHIKARI, JA
MATHUR, D
 
Subject OPTICAL MEDIA
LASER-PULSES
FILAMENTATION
LIGHT
PROPAGATION
PLASMONICS
ABSORPTION
ANTENNAS
PLASMAS
 
Description We report enhanced supercontinuum generation in water doped with gold nanoparticles of different shapes under modest ultrafast (35 fs) laser excitation. Reasonably, flat supercontinuum spectra covering similar to 1.45-2 eV (855-620 nm) are observed with as much as similar to 161 meV (63 nm) increase in the visible extent compared to pure water for dopants whose surface plasmon resonance (SPR) overlaps the excitation laser spectrum. We use a phenomenological self-phase modulation model to rationalize our results, taking cognizance of plasma contributions to the third-order susceptibility of water along with SPR-induced field enhancement. Such large spectral broadening may be useful for several applications involving imaging or microscopy with modest incident intensities. (C) 2013 AIP Publishing LLC.
 
Publisher AMER INST PHYSICS
 
Date 2014-10-14T13:10:34Z
2014-10-14T13:10:34Z
2013
 
Type Article
 
Identifier APPLIED PHYSICS LETTERS, 103(11)
http://dx.doi.org/10.1063/1.4820910
http://dspace.library.iitb.ac.in/jspui/handle/100/14486
 
Language en