Zobrazeno 1 - 10
of 131
pro vyhledávání: '"Solomon, G. s ."'
We study the processes in a quantum dot and its surrounds under resonant excitation with the addition of weak non-resonant light. We observe a decrease in inhomogeneous emission linewidth, as well as previously observed enhancement of resonant fluore
Externí odkaz:
http://arxiv.org/abs/1702.03947
Here we report lasing action in lima\c{c}on-shaped GaAs microdisks with quantum dots (QDs) embedded. Although the intracavity ray dynamics is predominantly chaotic, high-$Q$ modes are concentrated in the region $\chi > \chi_c$ as a result of wave loc
Externí odkaz:
http://arxiv.org/abs/0810.3923
We report single-mode lasing in subwavelength GaAs disks under optical pumping. The disks are fabricated by standard photolithography and two steps of wet chemical etching. The simple fabrication method can produce submicron disks with good circulari
Externí odkaz:
http://arxiv.org/abs/0810.2748
We presented a detailed experimental study on lasing in GaAs microstadium with various shapes. Unlike most deformed microcavities, the lasing threshold varies non-monotonically with the major-to-minor-axis ratio of the stadium. Under spatially unifor
Externí odkaz:
http://arxiv.org/abs/0705.0864
We report a quantum dot microcavity laser with a cw sub-microwatt lasing threshold, where a significant reduction of the lasing threshold is observed when a single quantum dot (QD) state is aligned with a cavity mode. The quality factor exceeds 15 00
Externí odkaz:
http://arxiv.org/abs/cond-mat/0702560
We demonstrate experimentally that lasing in a semiconductor microstadium can be optimized by controlling its shape. Under spatially uniform optical pumping, the first lasing mode in a GaAs microstadium with large major-to-minor-axis ratio usually co
Externí odkaz:
http://arxiv.org/abs/physics/0607233
Autor:
Jho, Y. D., Wang, X., Kono, J., Reitze, D. H., Belyanin, A. A., Kocharovsky, V. V., Kocharovsky, Vl. V., Solomon, G. S.
Cooperative spontaneous recombination (superfluorescence) of electron-hole plasmas in semiconductors has been a challenge to observe due to ultrafast decoherence. We argue that superfluorescence can be achieved in quantum-confined semiconductor syste
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607022
Autor:
Jho, Y. D., Wang, X., Kono, J., Reitze, D. H., Wei, X., Belyanin, A. A., Kocharovsky, V. V., Kocharovsky, Vl. V., Solomon, G. S.
Publikováno v:
Phys. Rev. Lett. 96, 237401 (2006)
We investigate photoluminescence from a high-density electron-hole plasma in semiconductor quantum wells created via intense femtosecond excitation in a strong perpendicular magnetic field, a fully-quantized and tunable system. At a critical magnetic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0601483
Autor:
Jho, Y. D., Kyrychenko, F. V., Kono, J., Wei, X., Crooker, S. A., Sanders, G. D., Reitze, D. H., Stanton, C. J., Solomon, G. S.
Publikováno v:
Phys. Rev. B 72, 045340 (2005)
Coupled magneto-exciton states between allowed (`bright') and forbidden (`dark') transitions are found in absorption spectra of strained In$_{0.2}$Ga$_{0.8}$As/GaAs quantum wells with increasing magnetic field up to 30 T. We found large (~ 10 meV) en
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410378
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