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Optics Letters

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  • Vol. 26, Iss. 20 — Oct. 15, 2001
  • pp: 1618–1620

Monitoring the ultrafast electric field change at a mid-infrared plasma Bragg mirror

R. Bratschitsch, T. Müller, N. Finger, G. Strasser, K. Unterrainer, and C. Sirtori  »View Author Affiliations


Optics Letters, Vol. 26, Issue 20, pp. 1618-1620 (2001)
http://dx.doi.org/10.1364/OL.26.001618


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Abstract

The electric field change of a femtosecond mid-infrared (MIR) pulse reflected by a new type of Bragg mirror is directly measured by time-resolved cross-correlation spectroscopy. The refractive-index contrast of the plasma Bragg mirror is achieved by use of different doping levels of only one type of semiconductor material (n+ -doped GaAs and undoped GaAs). The direct measurement of the time dependence of the electric field of a reflected MIR pulse permits the observation of a noninstantaneous response of a Bragg mirror compared with a metallic surface, which is due to the penetration of the pulse into the multilayer structure.

© 2001 Optical Society of America

OCIS Codes
(300.6240) Spectroscopy : Spectroscopy, coherent transient
(300.6250) Spectroscopy : Spectroscopy, condensed matter
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6500) Spectroscopy : Spectroscopy, time-resolved
(320.7150) Ultrafast optics : Ultrafast spectroscopy

Citation
R. Bratschitsch, T. Müller, N. Finger, G. Strasser, K. Unterrainer, and C. Sirtori, "Monitoring the ultrafast electric field change at a mid-infrared plasma Bragg mirror," Opt. Lett. 26, 1618-1620 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-20-1618


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