Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Apostolova, Tzveta"'
Autor:
Obreshkov, Boyan, Apostolova, Tzveta
We theoretically investigate photo-ionization and high harmonic generation in the bulk of zinc oxide (ZnO) subjected to intense femto-second laser pulses with mid-infrared wavelength (3 $\mu$m). Below threshold for optical breakdown of ZnO, we show t
Externí odkaz:
http://arxiv.org/abs/2405.01571
Autor:
Husakou, Anton, Babushkin, Ihar, Fedotova, Olga, Rusetsky, Ryhor, Khasanov, Oleg, Smirnova, Tatsiana, Fedotov, Alexander, Sapaev, Usman, Apostolova, Tzveta
We propose a new concept for generation of ultrashort pulses based on transient plasmonic resonance in nanoparticle composites. Photoionization and free-carriers plasma change the susceptibility of nanoparticles on a few-femtosecond scale. This resul
Externí odkaz:
http://arxiv.org/abs/2301.05035
Autor:
Husakou, Anton, Fedotova, Olga, Rusetsky, Ryhor, Khasanov, Oleg, Smirnova, Tatsiana, Fedotov, Alexander, Apostolova, Tzveta, Babushkin, Ihar, Sapaev, Usman
We describe a unified numerical model which allows fast and accurate simulation of nonlinear light propagation in nanoparticle composites, including various effects such as group velocity dispersion, second- and third-order nonlinearity, quasi-free-c
Externí odkaz:
http://arxiv.org/abs/2301.04531
Autor:
Apostolova, Tzveta, Obreshkov, Boyan
We investigate photoinization, energy deposition, plasma formation and the ultrafast optical breakdown in crystalline silicon irradiated by intense near-infrared laser pulses with pulse duration $\tau \le $ 100 fs. The occurrence of high-intensity br
Externí odkaz:
http://arxiv.org/abs/2107.07189
Autor:
Obreshkov, Boyan, Apostolova, Tzveta
Publikováno v:
J. Phys.: Conf. Ser. 1571, 012012 (2020)
We present the generation of high order harmonics in crystalline silicon subjected to intense near-infrared 30fs laser pulse. The harmonic spectrum extends from the near infrared to the extreme ultraviolet spectral region. Depending on the pulsed las
Externí odkaz:
http://arxiv.org/abs/2007.06347
Publikováno v:
Applied Surface Science 2020
We investigate the non-linear response and energy absorption in bulk silicon irradiated by intense 12-fs near-infrared laser pulses. Depending on the laser intensity, we distinguish two regimes of non-linear absorption of the laser energy: for low in
Externí odkaz:
http://arxiv.org/abs/1910.09023
Autor:
Apostolova, Tzveta, Obreshkov, B. D., Ionin, A. A., Kudryashov, S. I., Makarov, S. V., Mel'nik, N. N., Rudenko, A. A.
Ultrafast plasmonics of novel materials has emerged as a promising field of nanophotonics bringing new concepts for advanced optical applications. Ultrafast electronic photoexcitation of a diamond surface and subsequent surface plasmon-polaritons (SP
Externí odkaz:
http://arxiv.org/abs/1701.04650
Autor:
Apostolova, Tzveta, Obreshkov, Boyan
Publikováno v:
In Applied Surface Science 15 January 2022 572
Autor:
Apostolova, Tzveta, Obreshkov, Boyan
Publikováno v:
Diamond and Related Materials 82, 165-172 (2018)
We present theoretical results on the high-harmonic generation (HHG) in bulk diamond induced by intense laser pulse of wavelength 800 nm and duration 15 fs. For laser intensity in the range $1 \le I \le 50 $ TW/cm$^2$ above bandgap harmonics are gene
Externí odkaz:
http://arxiv.org/abs/1611.00805
Autor:
Apostolova, Tzveta1,2 (AUTHOR), Kohanoff, Jorge3 (AUTHOR), Medvedev, Nikita4,5 (AUTHOR), Oliva, Eduardo3 (AUTHOR), Rivera, Antonio3 (AUTHOR) antonio.rivera@upm.es
Publikováno v:
European Physical Journal D (EPJ D). Dec2022, Vol. 76 Issue 12, p1-11. 11p.