Publication

Strong coherent gain from semiconductor microcavities in the regime of excitonic saturation

Benoît Marie Joseph Deveaud, Ursula Oesterle, Jean-Louis Staehli, Marc-André Dupertuis, Cristiano Ciuti, Michele Saba
1999
Journal Articles

Abstract

We present femtosecond gain measurements in microcavity-embedded quantum wells. When the excitonic transition is saturated by an intense pump field, the spectrum measured with a weak probe pulse is strongly modulated by pump-probe wave mixing processes. A giant probe amplification occurs within the bandwidth of the empty-cavity mode. The optical feedback provided by the microcavity is responsible for a net gain of the broadband probe pulse. [S0163-1829(99)50424-4].

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https://infoscience.epfl.ch/entities/publication/73edca34-537e-4228-934d-42d932c94c1e

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Benoît Marie Joseph Deveaud, Ursula Oesterle, Jean-Louis Staehli, Marc-André Dupertuis, Cristiano Ciuti, Michele Saba
1999
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/73edca34-537e-4228-934d-42d932c94c1e

About this result

Related concepts (32)

Attosecond physics

Attosecond physics, also known as attophysics, or more generally attosecond science, is a branch of physics that deals with light-matter interaction phenomena wherein attosecond (10−18 s) photon pulses are used to unravel dynamical processes in matter with unprecedented time resolution. Attosecond science mainly employs pump–probe spectroscopic methods to investigate the physical process of interest.

Ultrashort pulse

In optics, an ultrashort pulse, also known as an ultrafast event, is an electromagnetic pulse whose time duration is of the order of a picosecond (10−12 second) or less. Such pulses have a broadband optical spectrum, and can be created by mode-locked oscillators. Amplification of ultrashort pulses almost always requires the technique of chirped pulse amplification, in order to avoid damage to the gain medium of the amplifier. They are characterized by a high peak intensity (or more correctly, irradiance) that usually leads to nonlinear interactions in various materials, including air.

Ultrafast laser spectroscopy

Ultrafast laser spectroscopy is a spectroscopic technique that uses ultrashort pulse lasers for the study of dynamics on extremely short time scales (attoseconds to nanoseconds). Different methods are used to examine the dynamics of charge carriers, atoms, and molecules. Many different procedures have been developed spanning different time scales and photon energy ranges; some common methods are listed below. Dynamics on the as to fs time scale are in general too fast to be measured electronically.

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Strong coherent gain from semiconductor microcavities in the regime of excitonic saturation

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