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Synthesis and nonlinear optical response of silver nanoparticles decorated polydiacetylene composite nanovesicles

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Title Synthesis and nonlinear optical response of silver nanoparticles decorated polydiacetylene composite nanovesicles
 
Creator BHUSHAN, B
KUNDU, T
SINGH, BP
 
Subject Third-order nonlinearity
Polydiacetylene
Metal nanoparticles
2-PHOTON ABSORPTION-SPECTRUM
SMALL METAL PARTICLES
THIN-FILMS
CONJUGATED POLYMER
LASER-PULSES
SUSCEPTIBILITY
PICOSECOND
ENHANCEMENT
DISPERSION
SIZE
 
Description We have synthesized, characterized and studied the third-order nonlinear optical properties of polydiacetylene (PDA) nanovesicles decorated by silver nanoparticles. The second molecular hyperpolarizability gamma(-omega;omega, -omega,omega) of the sample was investigated by the antiresonant ring interferometric nonlinear spectroscopic (ARMS) technique using lemtosecond modelocked Ti:sapphire laser in the spectral range of 720-820 nm. The observed dispersion of gamma has been explained in the framework of three-essential states model involving the ground state, a one-photon excited state and a two-photon excited state. The energy of two-photon state, transition dipole moments and line width of the transitions have been estimated. Our investigation reveals that the spectral dispersion characteristic of y for coated PDA nanovesicles is qualitatively similar to that observed for uncoated PDA nanovesicles but bears no resemblance to that observed in silver nanoparticles. The presence of silver nanoparticles increases the 7 values of coated nanovesicles slightly as compared to that of uncoated nanovesicles, suggesting a definite but weak coupling between free electrons of metal nanoparticles and IT -electrons of polymer in the composite system. (c) 2013 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-12-28T15:28:57Z
2014-12-28T15:28:57Z
2014
 
Type Article
 
Identifier OPTICS COMMUNICATIONS, 312127-133
0030-4018
1873-0310
http://dx.doi.org/10.1016/j.optcom.2013.09.028
http://dspace.library.iitb.ac.in/jspui/handle/100/16874
 
Language English