Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2000-07-10
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
RevTex 5 pages, 4 Postscript figures; submitted to Phys.Rev.Lett
Scientific paper
The novel method of observation and controlling of Bose-Einstein condensation in the system of spatially and momentum-space indirect excitons in coupled quantum wells using in-plane magnetic and normal electric fields is proposed. Fields are used for exciton dispersion engeneering. In the presence of in-plane magnetic field ground state of spatially indirect exciton becomes also indirect in the momentum space. Manipulation of electric field magnitude is used for tuning to resonance of transition of "dark" long-life spatially and momentum-space indirect exciton in condensate into spatially and momentum-space direct exciton in radiative zone, with phonon creation, and with subsequent recombination of the direct exciton in radiative zone. Recombination rate of indirect excitons in condensate according to proposed scheme sharply rises at resonance. As a result besides enhanced spectral narrow photoluminescence connected with recombination of direct exciton in radiative zone with specific angular dependence, almost monochromatic and unidirectional beam of phonons appears. An opportunity of obtaining of "phonon laser" radiation on the basis of this effect in considered.
Lozovik Yu. E.
Ovchinnikov Vladimir I.
No associations
LandOfFree
Controlling of exciton condensate by external fields and phonon laser does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Controlling of exciton condensate by external fields and phonon laser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controlling of exciton condensate by external fields and phonon laser will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-376758