Anomalous normal mode oscillations in semiconductor microcavities

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Description

Semiconductor microcavities as a composite exciton-cavity system can be characterized by two normal modes. Under an impulsive excitation by a short laser pulse, optical polarizations associated with the two normal modes have a {pi} phase difference. The total induced optical polarization is then expected to exhibit a sin{sup 2}({Omega}t)-like oscillation where 2{Omega} is the normal mode splitting, reflecting a coherent energy exchange between the exciton and cavity. In this paper the authors present experimental studies of normal mode oscillations using three-pulse transient four wave mixing (FWM). The result reveals surprisingly that when the cavity is tuned far below the exciton ... continued below

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8 p.

Creation Information

Wang, H.; Hou, H.Q. & Hammons, B.E. April 1, 1997.

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Authors

  • Wang, H. Univ. of Oregon, Eugene, OR (United States). Dept. of Physics
  • Hou, H.Q.
  • Hammons, B.E. Sandia National Labs., Albuquerque, NM (United States)

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Semiconductor microcavities as a composite exciton-cavity system can be characterized by two normal modes. Under an impulsive excitation by a short laser pulse, optical polarizations associated with the two normal modes have a {pi} phase difference. The total induced optical polarization is then expected to exhibit a sin{sup 2}({Omega}t)-like oscillation where 2{Omega} is the normal mode splitting, reflecting a coherent energy exchange between the exciton and cavity. In this paper the authors present experimental studies of normal mode oscillations using three-pulse transient four wave mixing (FWM). The result reveals surprisingly that when the cavity is tuned far below the exciton resonance, normal mode oscillation in the polarization is cos{sup 2}({Omega}t)-like, in contrast to what is expected form the simple normal mode model. This anomalous normal mode oscillation reflects the important role of virtual excitation of electronic states in semiconductor microcavities.

Physical Description

8 p.

Notes

OSTI as DE97004536

Source

  • Optical Society of America (OSA) annual conference on lasers and electro-optics, Baltimore, MD (United States), 18-23 May 1997

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  • Other: DE97004536
  • Report No.: SAND--97-0763C
  • Report No.: CONF-970510--4
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/468579 | External Link
  • Office of Scientific & Technical Information Report Number: 468579
  • Archival Resource Key: ark:/67531/metadc678230

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Creation Date

  • April 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • April 13, 2016, 12:53 p.m.

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Wang, H.; Hou, H.Q. & Hammons, B.E. Anomalous normal mode oscillations in semiconductor microcavities, report, April 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc678230/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.