Publication

Towards a room temperature polariton amplifier

Benoît Marie Joseph Deveaud, Jean-Louis Staehli, Cristiano Ciuti, Michele Saba, Stefan Kundermann
2002
Journal Articles

Abstract

We engineer a semiconductor microcavity through an appropriate choice of geometry and materials in order to maximise the exciton-photon coupling. The polaritonic nonlinearities in such devices survive at high temperatures and high excitation densities. We measure parametric polariton amplification up to 220 K in CdTe microcavities and up to 120 K in GaAs ones. The amplification is also outstanding, reaching as much as 5000 at low temperature. The experimental observations suggest that the operating temperature can be further improved by optimising the present technology, so that a real-world polariton amplifier appears no more as a mirage.

Official source

https://infoscience.epfl.ch/entities/publication/4940042f-36f0-4053-b93d-2a949e4887e1

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Benoît Marie Joseph Deveaud, Jean-Louis Staehli, Cristiano Ciuti, Michele Saba, Stefan Kundermann
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/4940042f-36f0-4053-b93d-2a949e4887e1

About this result

Related concepts (16)

Temperature

Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C (formerly called centigrade), the Fahrenheit scale (°F), and the Kelvin scale (K), the latter being used predominantly for scientific purposes.

Photonics

Photonics is a branch of optics that involves the application of generation, detection, and manipulation of light in form of photons through emission, transmission, modulation, signal processing, switching, amplification, and sensing. Photonics is closely related to quantum electronics, where quantum electronics deals with the theoretical part of it while photonics deal with its engineering applications. Though covering all light's technical applications over the whole spectrum, most photonic applications are in the range of visible and near-infrared light.

Exciton

An exciton is a bound state of an electron and an electron hole which are attracted to each other by the electrostatic Coulomb force. It is an electrically neutral quasiparticle that exists in insulators, semiconductors and some liquids. The exciton is regarded as an elementary excitation of condensed matter that can transport energy without transporting net electric charge. An exciton can form when a material absorbs a photon of higher energy than its bandgap. This excites an electron from the valence band into the conduction band.

Related publications (14)

Towards a room temperature polariton amplifier

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