Zobrazeno 1 - 10
of 257
pro vyhledávání: '"Kuznetsova, Y."'
Autor:
Kuznetsova, Y. Y., Dorow, C. J., Calman, E. V., Butov, L. V., Wilkes, J., Campman, K. L., Gossard, A. C.
Publikováno v:
Phys. Rev. B 95, 125304 (2017)
We present spatially- and spectrally-resolved photoluminescence measurements of indirect excitons in high magnetic fields. Long indirect exciton lifetimes give the opportunity to measure magnetoexciton transport by optical imaging. Indirect excitons
Externí odkaz:
http://arxiv.org/abs/1610.03116
Autor:
Dorow, C. J., Kuznetsova, Y. Y., Leonard, J. R., Chu, M. K., Butov, L. V., Wilkes, J., Hanson, M., Gossard, A. C.
Publikováno v:
Appl. Phys. Lett. 108, 073502 (2016)
We report on the principle and realization of an excitonic device: a ramp that directs the transport of indirect excitons down a potential energy gradient created by a perforated electrode at constant voltage. The device provides an experimental proo
Externí odkaz:
http://arxiv.org/abs/1602.02709
Autor:
Levy, A. L., Wurstbauer, U., Kuznetsova, Y. Y., Pinczuk, A., Pfeiffer, L. N., West, K. W., Manfra, M. J., Gardner, G. C., Watson, J. D.
Publikováno v:
Phys. Rev. Lett. 116, 016801 (2016)
Quantum phases of electrons in the filling factor range $2 \leq\nu\leq 3$ are probed by the weak optical emission from the partially populated second Landau level and spin wave measurements. Observations of optical emission include a multiplet of sha
Externí odkaz:
http://arxiv.org/abs/1512.04914
Autor:
Hasling, M. W., Kuznetsova, Y. Y., Andreakou, P., Leonard, J. R., Calman, E. V., Dorow, C., Butov, L. V., Hanson, M., Gossard, A. C.
We demonstrate experimental proof of principle for a stirring potential for indirect excitons. The azimuthal wavelength of this stirring potential is set by the electrode periodicity, the amplitude is controlled by the applied AC voltage, and the ang
Externí odkaz:
http://arxiv.org/abs/1410.0622
Autor:
Andreakou, P., Poltavtsev, S. V., Leonard, J. R., Calman, E. V., Remeika, M., Kuznetsova, Y. Y., Butov, L. V., Wilkes, J., Hanson, M., Gossard, A. C.
Publikováno v:
Applied Physics Letters 104, 091101 (2014)
Optical control of exciton fluxes is realized for indirect excitons in a crossed-ramp excitonic device. The device demonstrates experimental proof of principle for all-optical excitonic transistors with a high ratio between the excitonic signal at th
Externí odkaz:
http://arxiv.org/abs/1310.7842
Autor:
Leonard, J. R., Remeika, M., Chu, M. K., Kuznetsova, Y. Y., High, A. A., Butov, L. V., Wilkes, J., Hanson, M., Gossard, A. C.
Publikováno v:
Appl. Phys. Lett. 100, 231106 (2012)
We realized a potential energy gradient - a ramp - for indirect excitons using a shaped electrode at constant voltage. We studied transport of indirect excitons along the ramp and observed that the exciton transport distance increases with increasing
Externí odkaz:
http://arxiv.org/abs/1203.6239
Autor:
Kuznetsova, Y. Y., Leonard, J. R., Butov, L. V., Wilkes, J., Muljarov, E. A., Campman, K. L., Gossard, A. C.
Publikováno v:
Phys. Rev. B 85, 165452 (2012)
We report on the excitation energy dependence of the inner ring in the exciton emission pattern. The contrast of the inner ring is found to decrease with lowering excitation energy. Excitation by light tuned to the direct exciton resonance is found t
Externí odkaz:
http://arxiv.org/abs/1202.3096
Autor:
Winbow, A. G., Leonard, J. R., Remeika, M., Kuznetsova, Y. Y., High, A. A., Hammack, A. T., Butov, L. V., Wilkes, J., Guenther, A. A., Ivanov, A. L., Hanson, M., Gossard, A. C.
Publikováno v:
Phys. Rev. Lett. 106, 196806 (2011)
We report on the study of indirect excitons in moving lattices - conveyers created by a set of AC voltages applied to the electrodes on the sample surface. The wavelength of this moving lattice is set by the electrode periodicity, the amplitude is co
Externí odkaz:
http://arxiv.org/abs/1102.5329
Autor:
Leonard, J. R., Kuznetsova, Y., Yang, Sen, Butov, L. V., Ostatnický, T., Kavokin, A., Gossard, A. C.
Publikováno v:
Nano Lett., 2009, 9 (12), pp 4204-4208
Spin transport of indirect excitons in GaAs/AlGaAs coupled quantum wells was observed by measuring the spatially resolved circular polarization of exciton emission. Exciton spin transport over several microns originates from a long spin relaxation ti
Externí odkaz:
http://arxiv.org/abs/0905.2216
Autor:
Zurita, C., Casares, J., Shahbaz, T., Charles, P. A., Hynes, R. I., Shugarov, S., Goransky, V., Pavlenko, E. P., Kuznetsova, Y.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 316 (2000) 137
We present optical photometry of the X-ray transient XTE J2123-058, obtained in July-October 1998. The light curves are strongly modulated on the 5.95hrs orbital period, and exhibit dramatic changes in amplitude and form during the decline. We used s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0003092