Zobrazeno 1 - 10
of 30
pro vyhledávání: '"R. D. R. Bhat"'
Autor:
W. W. Rühle, Jens Hübner, Detlef Hommel, John E. Sipe, M. Klude, R. D. R. Bhat, H. M. van Driel
Publikováno v:
physica status solidi (b). 238:548-551
Ballistic currents of spin-polarized carriers are generated by quantum interference of one and two photon absorption. Polarization and relative phase of the exciting femtosecond laser fields control the magnitude and direction of the currents as well
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e75667ead2e4d39d9cee152e6bc4117c
https://doi.org/10.1002/pssb.200303187
https://doi.org/10.1002/pssb.200303187
Publikováno v:
Journal of Applied Physics. 91:4382-4386
We demonstrate coherent all-optical injection and control of a ballistic spin-polarized current in bulk, low-temperature-grown GaAs at room temperature. The spin current is injected by interfering the two-photon absorption of the fundamental (1.55 μ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c61c72ffe5aeba2bf7b472b7bfa94bb
https://doi.org/10.1063/1.1456943
https://doi.org/10.1063/1.1456943
Publikováno v:
Semiconductor Science and Technology. 19:S397-S399
We report independent coherent control of the density and spin of a non-equilibrium electron population in (111)-oriented GaAs. The symmetry and orientation of the GaAs combined with the polarizations and phases of the excitation fields provide a num
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e08356bc1a87febc0852f790de01fbee
https://doi.org/10.1088/0268-1242/19/4/130
https://doi.org/10.1088/0268-1242/19/4/130
Publikováno v:
Optics express. 11(17)
We use two mutually coherent, harmonically related pulse trains to experimentally characterize quantum interference control (QIC) of injected currents in low-temperature-grown gallium arsenide. We observe real-time QIC interference fringes, optimize
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5799758db956bb440626b289a674d135
https://pubmed.ncbi.nlm.nih.gov/19466094
https://pubmed.ncbi.nlm.nih.gov/19466094
Autor:
R. D. R. Bhat, Arthur L. Smirl, Ali Najmaie, John E. Sipe, X.Y. Pan, H. M. van Driel, Hui Zhao
Publikováno v:
Physical Review B. 72
We demonstrate the injection and control of pure spin currents in [110]-oriented GaAs quantum wells at room temperature by one-photon absorption of a single linearly polarized optical pulse. These currents result from the interference of absorption p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67370ee5f24bb109c093e1f04963e664
https://doi.org/10.1103/physrevb.72.201302
https://doi.org/10.1103/physrevb.72.201302
Autor:
R. D. R. Bhat, John E. Sipe
Quantum interference between one- and two-photon absorption pathways allows coherent control of interband transitions in unbiased bulk semiconductors; carrier population, carrier spin polarization, photocurrent injection, and spin current injection m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86c2799350e92e51c25258b2d55000ed
Autor:
Martin J. Stevens, Y. Kerachian, Arthur L. Smirl, Henry M. van Driel, Beata Derkowska, R. D. R. Bhat, John E. Sipe
Publikováno v:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII.
Quantum interference of single and two photon absorption pathways connecting valence and conduction band states in a semiconductor allow one to generate spin currents with or without charge currents. The underlying principles for these generation pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4b8b3989d3c6f2bc6fa09b9b7eb0e55
https://doi.org/10.1117/12.527098
https://doi.org/10.1117/12.527098
Publikováno v:
2003 Digest of LEOS Summer Topical Meeting (Cat. No.03TH8701).
Using two harmonically related pulse trains, we perform an experimental viability study that demonstrates the possibility of employing quantum interference control in semiconductors to detect the carrier-envelope phase evolution of a single octave-sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2abecd39b5ca12f4c92cc014904ec462
https://doi.org/10.1109/leosst.2003.1224340
https://doi.org/10.1109/leosst.2003.1224340
Publikováno v:
2004 Conference on Precision Electromagnetic Measurements.
We detect the carrier-envelope offset frequency of ultrashort optical pulses using quantum interference control of injected photocurrents in low-temperature-grown gallium arsenide. With further improvements to the signal fidelity, this solid-state de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fd9379617e4b88c548fe7412b667f06
https://doi.org/10.1109/cpem.2004.305380
https://doi.org/10.1109/cpem.2004.305380
Publikováno v:
Physical Review Letters. 92
We demonstrate quantum interference control of injected photocurrents in a semiconductor using the phase stabilized pulse train from a mode-locked Ti:sapphire laser. Measurement of the comb offset frequency via this technique results in a signal-to-n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9eccba1bcbe38dcc1d4dd3fc71f78d50
https://doi.org/10.1103/physrevlett.92.147403
https://doi.org/10.1103/physrevlett.92.147403