Zobrazeno 1 - 10
of 396
pro vyhledávání: '"Forchel, Alfred"'
Autor:
Horikiri, Tomoyuki, Byrnes, Tim, Kusudo, Kenichiro, Ishida, Natsuko, Matsuo, Yasuhiro, Shikano, Yutaka, Loeffler, Andreas, Hoefling, Sven, Forchel, Alfred, Yamamoto, Yoshihisa
Publikováno v:
Phys. Rev. B 95, 245122 (2017)
Exciton-polaritons are a coherent electron-hole-photon (e-h-p) system where condensation has been observed in semiconductor microcavities. In contrast to equilibrium Bose-Einstein condensation (BEC) for long lifetime systems, polariton condensates ha
Externí odkaz:
http://arxiv.org/abs/1707.02006
Autor:
Horikiri, Tomoyuki, Yamaguchi, Makoto, Kamide, Kenji, Matsuo, Yasuhiro, Byrnes, Tim, Ishida, Natsuko, Löffler, Andreas, Höfling, Sven, Shikano, Yutaka, Ogawa, Tetsuo, Forchel, Alfred, Yamamoto, Yoshihisa
Publikováno v:
Sci. Rep. 6, 25655 (2016)
In a standard semiconductor laser, electrons and holes recombine via stimulated emission to emit coherent light, in a process that is far from thermal equilibrium. Exciton-polariton condensates -- sharing the same basic device structure as a semicond
Externí odkaz:
http://arxiv.org/abs/1511.03786
Autor:
Kim, Na Young, Yamamoto, Yoshihisa, Utsunomiya, Shoko, Kusudo, Kenichiro, Hoefling, Sven, Forchel, Alfred
Microcavity exciton-polaritons are quantum quasi-particles arising from the strong light-matter coupling. They have exhibited rich quantum dynamics rooted from bosonic nature and inherent non-equilibrium condition. Dynamical condensation in microcavi
Externí odkaz:
http://arxiv.org/abs/1510.08197
Autor:
Nitsche, Wolfgang H., Kim, Na Young, Roumpos, Georgios, Schneider, Christian, Hoefling, Sven, Forchel, Alfred, Yamamoto, Yoshihisa
Publikováno v:
Phys. Rev. A 93, 053622 (May 2016)
We studied the spatial coherence of a Bosonic two-dimensional multi-mode condensate both through measurements and simulations. It is shown that condensates with a constant spatial density must be described as the superposition of several quantized mo
Externí odkaz:
http://arxiv.org/abs/1510.03096
Autor:
Pieczarka, Maciej, Syperek, Marcin, Dusanowski, Łukasz, Misiewicz, Jan, Langer, Fabian, Forchel, Alfred, Kamp, Martin, Schneider, Christian, Höfling, Sven, Kavokin, Alexey, Sęk, Grzegorz
Publikováno v:
Phys. Rev. Lett. 115, 186401 (2015)
An expanding polariton condensate is investigated under pulsed nonresonant excitation with a small laser pump spot. Far above the condensation threshold we observe a pronounced increase in the dispersion curvature with a subsequent linearization of t
Externí odkaz:
http://arxiv.org/abs/1503.07402
Autor:
Nitsche, Wolfgang H., Kim, Na Young, Roumpos, Georgios, Schneider, Christian, Kamp, Martin, Hoefling, Sven, Forchel, Alfred, Yamamoto, Yoshihisa
Publikováno v:
Phys.Rev.B 90 (2014) 205430
We observe quasi-long range coherence in a two-dimensional condensate of exciton-polaritons. Our measurements are the first to confirm that the spatial correlation algebraically decays with a slow power-law, whose exponent quantitatively behaves as p
Externí odkaz:
http://arxiv.org/abs/1401.0756
Autor:
Kusudo, Kenichiro, Kim, Na Young, Loeffler, Andreas, Hoefling, Sven, Forchel, Alfred, Yamamoto, Yoshihisa
We explore the exciton-polariton condensation in the two degenerate orbital states. In the honeycomb lattice potential, at the third band we have two degenerate vortex-antivortex lattice states at the inequivalent K and K'-points. We have observed en
Externí odkaz:
http://arxiv.org/abs/1211.3833
Autor:
Horikiri, Tomoyuki, Matsuo, Yasuhiro, Shikano, Yutaka, Loeffler, Andreas, Hoefling, Sven, Forchel, Alfred, Yamamoto, Yoshihisa
Publikováno v:
J. Phys. Soc. Jpn. 82, 084709 (2013)
Observations of polariton condensation in semiconductor microcavities suggest that polaritons can be exploited as a novel type of laser with low input-power requirements. The low-excitation regime is approximately equivalent to thermal equilibrium, a
Externí odkaz:
http://arxiv.org/abs/1211.1753
Autor:
Kim, Na Young, Kusudo, Kenichiro, Loeffler, Andreas, Hoefling, Sven, Forchel, Alfred, Yamamoto, Yoshihisa
Dirac particles, massless relativistic entities, obey linear energy dispersions and hold important implication in particle physics. Recent discovery of Dirac fermions in condensed matter systems including graphene and topological insulators raises gr
Externí odkaz:
http://arxiv.org/abs/1210.2153
Autor:
Pelc, Jason S., Yu, Leo, De Greve, Kristiaan, McMahon, Peter L., Natarajan, Chandra M., Esfandyarpour, Vahid, Maier, Sebastian, Schneider, Christian, Kamp, Martin, Höfling, Sven, Hadfield, Robert H., Forchel, Alfred, Yamamoto, Yoshihisa, Fejer, M. M.
Publikováno v:
Optics Express, Vol. 20, Issue 25, pp. 27510-27519 (2012)
Long-distance quantum communication networks require appropriate interfaces between matter qubit-based nodes and low-loss photonic quantum channels. We implement a downconversion quantum interface, where the single photons emitted from a semiconducto
Externí odkaz:
http://arxiv.org/abs/1209.6404