Author Archives: admin_q

Ferrielectric liquid crystal with a subwavelength helix pitch as an electrooptical medium for phase spatial light modulators

E. P. Pozhidaev, S. P. Kotova, S. A. Samagin P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow Samara Branch of P. N. Lebedev Physical Institute, Russian Academy of Sciences Abstract: We study the possibility of using a ferrielectric liquid crystal as an electro-optical medium for phase spatial light modulators. Electro-optical characteristics… Read More »

High-resolution imaging spectrograph for the ultra-soft X-ray range

A. N. Shatokhina, A. O. Kolesnikova, V. N. Mikhailovb, V. P. Ratushnyib, E. N. Ragozina P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow HoloGrate, Joint-Stock Company, St. Peterburg Abstract: An imaging (stigmatic) spectrograph composed of a flat grazing-incidence VLS grating and a focusing broadband normal-incidence multilayer mirror (Mo/Be, 111–138 Å Mo/Si,… Read More »

Hot zone temperature measurement by 1f modulation diode laser absorption spectroscopy with logarithmic signal conversion

V. V. Liger, V. R. Mironenko, Yu. A. Kuritsyn, M. A. Bol’shov Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Abstract: A new version of diode laser absorption spectroscopy (DLAS) is developed for determining the temperature of hot zones. The technique is based on a combination of slow scanning of the radiation frequency of… Read More »

Study of the composition of boron nanoparticles obtained by laser ablation in a liquid using Raman spectroscopy

K. O. Aiyyzhy, E. V. Barmina, N. N. Mel’nik, O. V. Uvarov, G. A. Shafeev Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow National Research Nuclear University MEPhI Abstract: Using Raman spectroscopy and transmission electron microscopy, we study boron nanoparticles… Read More »

Kinetics of induced absorption of polyatomic molecules upon two-quantum excitation

S. N. Letuta, A. T. Ishemgulov, D. Dorofeev, D. Tsyurko Orenburg State University Abstract: We study the kinetics of triplet‒triplet absorption of polyatomic molecules (on the example of such halogen-substituted fluoresceins as eosin and erythrosin) upon stepwise population of their high triplet electronically exited states by radiation from two single-pulse lasers with a controlled delay… Read More »

Increasing the yield of X-ray and THz radiation under the action of femtosecond laser pulses on a thin foil

M. M. Nazarov, P. A. Shcheglov, A. A. Garmatina, M. V. Chashchin, Z. Ch. Margushev, K. A. Bzheumikhov, A. V. Mitrofanov, D. A. Sidorov-Biryukov, A. M. Zheltikov, V. M. Gordienko, V. Ya. Panchenko National Research Centre “Kurchatov Institute”, Moscow Federal State Budget Scientific Establishment “Federal Scientific Center “Kabardino-Balkarian Scientific Center of the Russian Academy of… Read More »

Quasi-synchronous generation of the second optical harmonic under the pendulum effect in photonic crystals

L. Dergachyova, B. I. Mantsyzov Faculty of Physics, Lomonosov Moscow State University Abstract: Generation of the second optical harmonic in one-dimensional photonic crystals under conditions of the pendulum effect with dynamic Bragg diffraction in the Laue geometry is theoretically considered. It is shown that in photorefractive photonic crystals, as well as in photonic crystals with… Read More »

Investigation of the quasi-cw heating dynamics of an active region of high-power semiconductor lasers (λ = 1060 nm) with an ultra-wide emitting aperture (800 μm)

I. S. Shashkin, A. D. Rybkin, V. A. Kryuchkov, A. E. Kazakova, D. N. Romanovich, N. A. Rudova, S. O. Slipchenko, N. A. Pikhtin Ioffe Institute, St. Petersburg Abstract: An approach has been developed to study temporal behaviour of the active region overheating in high-power semiconductor lasers (λ = 1060 nm) with an ultra-wide aperture… Read More »