TERAHERTZ RESPONSE OF A SILICON SURFACE WITH APPLIED NANOSIZED GOLD PARTICLES
A. S. Sin'ko1,2, K. A. Moldosanov3, P. M. Solyankin1, I. A. Augeredov1,2, A. P. Shkurinov1,2
1IPLIT RAS, 140700, Shatura, Moscow Region, ul. Svyatoozerskaya, 1
2Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119992
3Kyrgyz-Russian Slavic University, ul. Kievskaya 44, Bishkek 720000, Kyrgyz Republic
Keywords: терагерцовое излучение, нелинейный отклик поверхности, наночастицы золота, двухфононное поглощение, terahertz radiation, nonlinear surface response, gold nanoparticles, two-phonon absorption
Abstract
Terahertz emission spectra of the surface of silicon crystals with different types of conductivity upon excitation by femtosecond laser pulses at various temperatures were experimentally recorded. Observed features in the terahertz spectra of the a silicon surface correspond to the energy structure of the impurity centers determining the type of conductivity of the sample. Comparison is made with the results obtained in the case of deposition of gold nanoparticles on the semiconductor surface. The spectral features of the surface with the deposed nanoparticles are discussed using the terahertz re-emission mechanism in two-phonon absorption
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