Zobrazeno 1 - 10
of 509
pro vyhledávání: '"HATZOPOULOS, Z."'
Autor:
Lukoshkin, Vladimir, Sedov, Evgeny, Kalevich, Vladimir, Hatzopoulos, Z., Savvidis, P. G., Kavokin, Alexey
Publikováno v:
Scientific Reports 13, 4607 (2023)
Concentric ring exciton polariton condensates emerging under non-resonant laser pump in an annular trapping potential support persistent circular currents of polaritons. The trapping potential is formed by a cylindrical micropillar etched in a semico
Externí odkaz:
http://arxiv.org/abs/2210.05306
Autor:
Sedov, Evgeny, Lukoshkin, Vladimir, Kalevich, Vladimir, Chestnov, Igor, Hatzopoulos, Z., Savvidis, P. G., Kavokin, Alexey
Publikováno v:
Nanosystems: Physics, Chemistry, Mathematics 13(6), 608-614 (2022)
We study formation of superfluid currents of exciton polaritons in annular polariton condensates in a cylindrical micropillar cavity under the spatially localised nonresonant optical pumping. Since polariton condensates are strongly nonequilibrium sy
Externí odkaz:
http://arxiv.org/abs/2210.05300
Autor:
Borat, J., Cherbunin, Roman, Sedov, Evgeny, Aladinskaia, Ekaterina, Liubomirov, Alexey, Litvyak, Valentina, Petrov, Mikhail, Zhou, Xiaoqing, Hatzopoulos, Z., Kavokin, Alexey, Savvidis, P. G.
We keep track of the orbital degree of freedom of an exciton polariton condensate, confined in an optical trap, and reveal the stochastic switching of persistent annular polariton currents in the pulse-periodic excitation regime.In an elliptic trap,
Externí odkaz:
http://arxiv.org/abs/2210.05299
Autor:
Ryzhov, I. I., Kozlov, V. O., Kuznetsov, N. S., Chestnov, I. Yu., Kavokin, A. V., Tzimis, A., Hatzopoulos, Z., Savvidis, P. G., Kozlov, G. G., Zapasskii, V. S.
Publikováno v:
Phys. Rev. Research 2, 022064 (2020)
Bose-Einstein condensates of exciton-polaritons are known for their fascinating coherent and polarization properties. The spin state of the condensate is reflected in polarization of the exciton-polariton emission, with temporal fluctuations of this
Externí odkaz:
http://arxiv.org/abs/2003.02771
Autor:
Sedov, E. S., Lukoshkin, V. A., Kalevich, V. K., Hatzopoulos, Z., Savvidis, P. G., Kavokin, A. V.
Publikováno v:
ACS Photonics 7(5), 1163-1170 (2020)
We excite exciton-polariton condensates in half-moon shapes by the non-resonant optical excitation of GaAs-based cylindrical pillar microcavities. In this geometry, the {\pi}-jump of the phase of the condensate wave function coexists with a gradual {
Externí odkaz:
http://arxiv.org/abs/1910.00344
Autor:
Rozas, E., Martín, M. D., Tejedor, C., Viña, L., Deligeorgis, G., Hatzopoulos, Z., Savvidis, P. G.
Publikováno v:
Phys. Status Solidi B 256, 1800519 (2019)
We investigate the thermal robustness of traveling polariton condensates. We create remote condensates that have never been in contact, and study their interference in momentum space, when they travel with the same velocity, by means of time-resolved
Externí odkaz:
http://arxiv.org/abs/1902.04358
Autor:
Ohadi, H., Redondo, Y. del Valle-Inclan, Ramsay, A. J., Hatzopoulos, Z., Liew, T. C. H., Eastham, P. R., Savvidis, P. G., Baumberg, J. J.
Publikováno v:
Phys. Rev. B 97, 195109 (2018)
We demonstrate that the synchronization of a lattice of solid-state condensates when inter-site tunnelling is switched on, depends strongly on the weak local disorder. This finding is vital for implementation of condensate arrays as computation devic
Externí odkaz:
http://arxiv.org/abs/1803.03195
Autor:
Be'er, O., Ohadi, H., Redondo, Y. del Valle-Inclan, Ramsay, A. J., Tsintzos, S. I., Hatzopoulos, Z., Savvidis, P. G., Baumberg, J. J.
Publikováno v:
Appl. Phys. Lett. 111, 261104 (2017)
We report spin and intensity coupling of an exciton-polariton condensate to the mechanical vibrations of a circular membrane microcavity. We optically drive the microcavity resonator at the lowest mechanical resonance frequency while creating an opti
Externí odkaz:
http://arxiv.org/abs/1802.05442
Autor:
Rozas, E., Martín, M. D., Tejedor, C., Viña, L., Deligeorgis, G., Hatzopoulos, Z., Savvidis, P. G.
Publikováno v:
Phys. Rev. B 97, 075442 (2018)
We present a time-resolved experimental study of the temperature effect on the coherence of traveling polariton condensates. The simultaneous detection of their emission both in real- and reciprocal-space allows us to fully monitor the condensates' d
Externí odkaz:
http://arxiv.org/abs/1710.06292
Autor:
Pickup, L., Kalinin, K., Askitopoulos, A., Hatzopoulos, Z., Savvidis, P. G., Berloff, N. G., Lagoudakis, P. G.
Publikováno v:
Phys. Rev. Lett. 120, 225301 (2018)
We realise bistability in the spinor of polariton condensates under non-resonant optical excitation and in the absence of biasing external fields. Numerical modelling of the system using the Ginzburg-Landau equation with an internal Josephson couplin
Externí odkaz:
http://arxiv.org/abs/1709.07351