Výsledky vyhledávání - "Myung-Whun Kim"

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Origin of the mid-infrared peaks in the optical conductivity of LaMnO$_{3}$

Autor: Munkhbaatar, Purevdorj, Myung-Whun, Kim

We calculated the infrared conductivity spectrum of orbitally ordered LaMnO$_3$ in phonon frequency and overtone frequency ranges. We considered orbital exchange, Jahn-Teller electron-phonon coupling, and phonon--phonon coupling. The fundamental exci

Externí odkaz: http://arxiv.org/abs/2010.00859

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An information entropy interpretation of photon absorption by dielectric media

Autor: Han, Sung Wook, Myung-Whun, Kim

We measured photon absorption in dielectric media and proposed the photon-version Beer-Lambert's law to quantify the absorption. We used a Hong-Ou-Mandel interferometer and 810 nm twin-photons. We found that the depth ratio of the null point in the i

Externí odkaz: http://arxiv.org/abs/1907.03073

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Spectral intensity and phase changes of short laser pulses by two-photon absorption

Autor: Khos-Ochir, Tsogvoo, Myung-Whun, Kim, Munkhbaatar, Purevdorj

We calculated third order non-linear polarization to estimate the two-photon absorption of non-interacting two-level molecules in the transmission-type degenerate pump-probe geometry. The spectral intensity and the phase changes of the laser pulses w

Externí odkaz: http://arxiv.org/abs/1812.08573

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Orbital wave in the Raman scattering cross section of LaMnO3

Autor: Munkhbaatar, Purevdorj, Myung-Whun, Kim

Publikováno v: Phys. Rev. B 97, 085101 (2018)

We calculated the polarization-dependent Raman scattering cross section spectra of LaMnO3 below the A-type magnetic ordering temperature. Two strong peaks appear around the MnO6 octahedra stretching phonon frequency. One mode shows Ag symmetry, while

Externí odkaz: http://arxiv.org/abs/1709.10391

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