Nonlinear optical properties of Cu
x
S and CuInS2 semiconductor nanoparticles in sol-gel glass |
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| Authors: | A M Malyarevich N N Posnov K V Yumashev V S Gurin A A Alekseenko V B Prokopenko I M Mel’nichenko |
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| Institution: | (1) International Laser Center at the Belarusian State Polytechnical Academy, 65 F. Skorina Ave., Bld. 17, 220027 Minsk, Belarus;(2) Scientific-Research Institute of Physical and Chemical Problems at the Belarusian State University, Minsk;(3) Gomel State Technical University, Belarus;(4) Gomel State University, Belarus |
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| Abstract: | Quartz glasses containing ultradisperse particles (with a mean radius of 5 ± 3 nm) of semiconductor compounds CuxS and CuInS2 were synthesized using the sol-gel technology. The line and differential absorption spectra of such glasses were investigated.
In the range 600–700 nm, the samples demonstrate absorption bands that are assigned to the lowest-lying energy transition
in quantum-size particles. Excitation by laser pulses with a wavelength of 540 nm causes the effect of induced absorption
in the range of 500–950 nm. The induced absorption in the samples containing CuxS nanoparticles undergoes relaxation which has a characteristic time of ∼500 psec, and in the samples with CuInS2 nanoparticles it has a two-exponential form with τ1 ≈ 30 psec and τ2>1 nsec.
Translated from Zhurnal Prikladnoi Spektroskopii, vol. 67, No. 4, pp. 507–511, July–August, 2000. |
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| Keywords: | nanoparticle laser spectroscopy nonlinear optical properties |
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