منابع مشابه
Harmonic-potential traps for indirect excitons in coupled quantum wells
We explain our method of creating an in-plane harmonic potential for indirect excitons in coupled quantum wells, which has been developed for experiments on Bose condensation of excitons in two dimensions, although this method may also be used for trapping a two-dimensional electron gas. The indirect excitons in our coupled quantum wells exhibit a Stark shift of over 60 meV and lifetime of appr...
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We consider in-plane electrostatic traps for indirect excitons in coupled quantum wells, where the traps are formed by a laterally modulated gate voltage. An intrinsic obstacle for exciton confinement in electrostatic traps is an in-plane electric field that can lead to exciton dissociation. We propose a design to suppress the in-plane electric field and, at the same time, to effectively confin...
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L. V. Butov, A. V. Mintsev, Yu. E. Lozovik, K. L. Campman, and A. C. Gossard Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia Institute of Spectroscopy, Russian Academy of Sciences, 142092 Troitsk, Russia Department of Electrical and Computer Engineering and Center for Quantized Electronic Structures (QUEST), University of California, Santa Barbara, Ca...
متن کاملMoving gapless indirect excitons in monolayer graphene
: The existence of moving indirect excitons in monolayer graphene is theoretically evidenced in the envelope-function approximation. The excitons are formed from electrons and holes near the opposite conic points. The electron-hole binding is conditioned by the trigonal warping of the electron spectrum. It is stated that the exciton exists in some sectors of the exciton momentum space and has t...
متن کاملTwo-dimensional snowflake trap for indirect excitons.
We present experimental proof of principle for two-dimensional electrostatic traps for indirect excitons. A confining trap potential for indirect excitons is created by a snowflake-shaped electrode pattern. We demonstrate collection of indirect excitons from all directions to the trap center and control of the trap potential by voltage.
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ژورنال
عنوان ژورنال: Nano Letters
سال: 2009
ISSN: 1530-6984,1530-6992
DOI: 10.1021/nl900605b