Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Ohadi, Hamid"'
Autor:
Makhonin, Maxim, Delphan, Anthonin, Song, Kok Wee, Walker, Paul, Isoniemi, Tommi, Claronino, Peter, Orfanakis, Konstantinos, Rajendran, Sai Kiran, Ohadi, Hamid, Heckötter, Julian, Aßmann, Marc, Bayer, Manfred, Tartakovskii, Alexander, Skolnick, Maurice, Kyriienko, Oleksandr, Krizhanovskii, Dmitry
Rydberg excitons (analogues of Rydberg atoms in condensed matter systems) are highly excited bound electron-hole states with large Bohr radii. The interaction between them as well as exciton coupling to light may lead to strong optical nonlinearity,
Externí odkaz:
http://arxiv.org/abs/2401.02868
Autor:
Orfanakis, Konstantinos, Rajendran, Sai Kiran, Ohadi, Hamid, Zielińska-Raczyńska, Sylwia, Czajkowski, Gerard, Karpiński, Karol, Ziemkiewicz, David
Publikováno v:
Phys. Rev. B 103, 245426 (2021)
The quantum confinement of Rydberg excitons is an important step towards exploiting their large nonlinearities for quantum applications. We observe Rydberg excitons in natural nanoparticles of Cu$_2$O. We resolve up to the principal quantum number $n
Externí odkaz:
http://arxiv.org/abs/2011.12006
Akademický článek
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Autor:
Cilibrizzi, Pasquale, Sigurdsson, Helgi, Liew, Tim C. H., Ohadi, Hamid, Wilkinson, Simon, Askitopoulos, Alexis, Shelykh, Ivan A., Lagoudakis, Pavlos
Publikováno v:
Phys. Rev. B 92, 155308 (2015)
We report on the observation of spin whirls in a radially expanding polariton condensate formed under non-resonant optical excitation. Real space imaging of polarization- and time-resolved photoluminescence reveal a spiralling polarization pattern in
Externí odkaz:
http://arxiv.org/abs/1602.04757
Autor:
Cilibrizzi, Pasquale, Sigurdsson, Helgi, Liew, Tim C. H., Ohadi, Hamid, Askitopoulos, Alexis, Brodbeck, Sebastian, Schneider, Christian, Shelykh, Ivan A., Höfling, Sven, Ruostekoski, Janne, Lagoudakis, Pavlos
We study the polarization dynamics of a spatially expanding polariton condensate under nonresonant linearly polarized optical excitation. The spatially and temporally resolved polariton emission reveals the formation of non-trivial spin textures in t
Externí odkaz:
http://arxiv.org/abs/1602.04711
Autor:
Pinsker, Florian, Bao, Weizhu, Zhang, Yong, Ohadi, Hamid, Dreismann, Alexander, Baumberg, Jeremy
Publikováno v:
Phys. Rev. B 92, 195310 (2015)
We introduce and analyze a novel mean-field model for polariton condensates with velocity dependence of the effective polariton mass due the photon and exciton components. The effective mass depends on the in-plane wave vector k, which at the inflect
Externí odkaz:
http://arxiv.org/abs/1508.03621
Akademický článek
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Autor:
Ohadi, Hamid, Kammann, Elena, Liew, Timothy C. H., Lagoudakis, Konstantinos G., Kavokin, Alexey V., Lagoudakis, Pavlos G.
Publikováno v:
Phys. Rev. Lett. 109, 016404 (2012)
We report on the simultaneous observation of spontaneous symmetry breaking and long-range spatial coherence both in the strong and the weak-coupling regime in a semiconductor microcavity. Under pulsed excitation, the formation of a stochastic order p
Externí odkaz:
http://arxiv.org/abs/1204.5969
Autor:
Kammann, Elena, Liew, Timothy C. H., Ohadi, Hamid, Cilibrizzi, Pasquale, Tsotsis, Panayiotis, Hatzopoulos, Zacharias, Savvidis, Pavlos G., Kavokin, Alexey V., Lagoudakis, Pavlos G.
We report on the experimental observation of the non-linear analogue of the optical spin Hall effect under highly non-resonant circularly polarized excitation of an exciton polariton condensate in a GaAs/AlGaAs microcavity. Initially circularly polar
Externí odkaz:
http://arxiv.org/abs/1204.4799