Zobrazeno 1 - 10
of 412
pro vyhledávání: '"Chekalin, S."'
We have studied the ultrafast optical response of a PbSe crystal to an intense picosecond terahertz pulse with a peak electric field strength of up to $\sim$ 500 kV/cm. The reflectivity anisotropy signal contains oscillations at the fundamental frequ
Externí odkaz:
http://arxiv.org/abs/2412.05704
We report the observation of the electro-optic effect in Bi$_2$Se$_3$ crystals induced by an intense single-cycle terahertz pulse. The effect reveals itself as a transient change of the polarization state of a femtosecond laser pulse reflected from t
Externí odkaz:
http://arxiv.org/abs/2410.20277
Publikováno v:
Phys. Rev. B 108, 224309 (2023)
We investigate the ultrafast optical response of PbTe to an intense single-cycle terahertz pulse, resonant with the soft transverse optical (TO) phonon mode of the crystal. We detect multifrequency oscillations of the reflectance anisotropy, which we
Externí odkaz:
http://arxiv.org/abs/2309.06549
Autor:
Ren, Boquan, Arkhipova, A. A., Zhang, Yiqi, Kartashov, Y. V., Wang, Hongguang, Zhuravitskii, S. A., Skryabin, N. N., Dyakonov, I. V., Kalinkin, A. A., Kulik, S. P., Kompanets, V. O., Chekalin, S. V., Zadkov, V. N.
Publikováno v:
Light: Science and Applications 12, 194 (2023)
Introduction of controllable deformations into periodic materials that lead to disclinations in their structure opens novel routes for construction of higher-order topological insulators hosting topological states at disclinations. Appearance of thes
Externí odkaz:
http://arxiv.org/abs/2304.11936
Autor:
Arkhipova, A. A., Kartashov, Y. V., Ivanov, S. K., Zhuravitskii, S. A., Skryabin, N. N., Dyakonov, I. V., Kalinkin, A. A., Kulik, S. P., Kompanets, V. O., Chekalin, S. V., Ye, F., Konotop, V. V., Torner, L., Zadkov, V. N.
Publikováno v:
Physical Review Letters 130, 083801 (2023)
We observe linear and nonlinear light localization at the edges and in the corners of truncated moir\'e lattices created by the superposition of periodic mutually-twisted at Pythagorean angles square sublattices. Experimentally exciting corner linear
Externí odkaz:
http://arxiv.org/abs/2301.02090
Autor:
Arkhipova, A. A., Ivanov, S. K., Zhuravitskii, S. A., Skryabin, N. N., Dyakonov, I. V., Kalinkin, A. A., Kulik, S. P., Kompanets, V. O., Chekalin, S. V., Kartashov, Y. V., Zadkov, V. N.
Publikováno v:
Nanophotonics 2022; 11(16): 3653-3661
We report the experimental observation of the periodic switching of topological edge states between two dimerized fs-laser written waveguide arrays. Switching occurs due to the overlap of the modal fields of the edge states from topological forbidden
Externí odkaz:
http://arxiv.org/abs/2206.14935
Autor:
Kartashov, Y. V., Arkhipova, A. A., Zhuravitskii, S. A., Skryabin, N. N., Dyakonov, I. V., Kalinkin, A. A., Kulik, S. P., Kompanets, V. O., Chekalin, S. V., Torner, L., Zadkov, V. N.
Publikováno v:
Phys. Rev. Lett. 128, 093901 (2022)
We report the experimental observation of nonlinear light localization and edge soliton formation at the edges of fs-laser written trimer waveguide arrays, where transition from non-topological to topological phases is controlled by the spacing betwe
Externí odkaz:
http://arxiv.org/abs/2203.04576
Publikováno v:
JETP Letters (2021)
We have studied spectral evolution of the $E_u^1$ phonon line of a topological insulator Bi$_{2-x}$Sr$_x$Se$_3$ with temperature. Unlike the Raman-active phonons, the $E_u^1$ mode demonstrates softening upon cooling the crystal, and the corresponding
Externí odkaz:
http://arxiv.org/abs/2201.06528
Publikováno v:
Phys. Rev. B 105, 174304 (2022)
We have observed short-lived optical birefringence in a CH$_3$NH$_3$PbBr$_3$ single crystal induced by a powerful nearly single-cycle terahertz pulse. Apart from the instantaneous contribution that follows the profile of the squared pump electric fie
Externí odkaz:
http://arxiv.org/abs/2110.08234
Publikováno v:
Phys. Rev. B 102, 224301 (2020)
Selective excitation of coherent high-amplitude vibrations of atoms in a solid can induce exotic nonequilibrium states, in which the character of interactions between electronic, magnetic and lattice degrees of freedom is considerably altered and the
Externí odkaz:
http://arxiv.org/abs/2006.11923