Coherent-light emission from exciton condensates in semiconductor quantum wells

We show that a quasi-two dimensional condensate of optically active excitons emits coherent light even in the absence of population inversion. This allows an unambiguous and clear experimental detection of the condensed phase. We prove that, due to the exciton–photon coupling, quantum and thermal fluctuations do not destroy condensation at finite temperature. Suitable conditions to achieve condensation are temperatures of a few K for typical exciton densities and the use of a pulsed and preferably circularly polarized, laser.

Optical spin transfer in ferromagnetic semiconductors

Circularly polarized laser pulses that excite electron-hole pairs across the band gap of (III,Mn)V ferromagnetic semiconductors can be used to manipulate and to study collective magnetization dynamics. The initial spin orientation of a photocarrier in a (III,V) semiconductors is determined by the polarization state of the laser. We show that the photocarrier spin can be irreversibly transferred to the collective magnetization, whose dynamics can consequently be flexibly controlled by suitably chosen laser pulses. As illustrations we demonstrate the feasibility of all optical ferromagnetic resonance and optical magnetization reorientation.

Optical spin transfer in ferromagnetic semiconductors [poster]

Poster presented in the International Conference of Magnetism, Rome, July 2003.

Theory of many-particle correlations and optical properties of semiconductor quantum dots : photons and quantum dots

Otto-von-Guericke-Universität Magdeburg, Fakultät für Naturwissenschaften, Dissertation, 2016

Bibliography on semiconductor nuclear radiation detectors /

"December 6, 1960."

Bibliography on semiconductor nuclear radiation detectors /

Included are 464 selected references on the theory, manufacture, properties, performance, and utliization of semiconductor materials for the detection of nuclear radiation. Reports and open literature references are covered through January 1962.

Zn₃P₂ as an improved semiconductor for photovoltaic solar cells : ninth quarterly report for September 1 - November 31, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."

Design of the program-controlled semiconductor and printed circuit board test console /

"October 21, 1963"

Molecular bandpass amplifiers. Contract AF33(616)-7252. Interim scientific report no. 1- [of the] Development Laboratory, Semiconductor Division, Hughes Aircraft Co.

Mode of access: Internet.

All semiconductor distributed aerospace processor/memory study /

"August 1973."

Semiconductor measurement technology : techniques for measuring the integrity of passivation overcoats on integrated circuits /

Mode of access: Internet.

Semiconductor /

Mode of access: Internet.

Semiconductor detectors in medicine, March 8-9, 1973, presented by Nuclear Medicine Division, Department of Radiology, University of California School of Medicine and Continuing Education in Health Sciences, University of California, San Francisco, California, supported in part by KeVex Corporation, Burlingame, California [et al.

Mode of access: Internet.

Semiconductor measurement technology : reliability technology for cardiac pacemakers II, a workshop report /

Mode of access: Internet.