Phys. Rev. Lett. 68, 2216 - 2219 (1992)Coherent submillimeter-wave emission from charge oscillations in a double-well potential |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1974: |
Hartmut G. Roskos, Martin C. Nuss, Jagdeep Shah, Karl Leo, and David A. B. Miller
AT&T Bell Laboratories, Crawfords Corner Road, Holmdel, New Jersey 07733
A. Mark Fox
Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom
Stefan Schmitt-Rink
Department of Physics and Materials Science Center, Philipps-University, W-3550 Marburg, Germany
Klaus Köhler
Fraunhofer-Institute for Applied Solid State Physics, W-7800 Freiburg, Germany
Received 11 October 1991
We directly observe the electromagnetic radiation emitted by electrons coherently oscillating between the two wells of a semiconductor coupled-quantum-well structure. Using time-resolved coherent detection of the submillimeter-wave radiation from these spatial charge oscillations, we trace up to fourteen oscillations at 1.5 THz before phase relaxation destroys the coherence of the oscillating wave packet. In addition to the oscillatory electromagnetic signal, we also observe an instantaneous signal from electric-field-induced optical rectification in the semiconductor structure.
©1992 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v68/p2216
DOI: 10.1103/PhysRevLett.68.2216
PACS: 73.20.Dx, 42.50.Md, 42.65.Re, 84.40.Cb
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