Publication

Suppression of exciton-polariton light absorption in multiple quantum well Bragg structures

Benoît Marie Joseph Deveaud, Ursula Oesterle, Jean-Louis Staehli, Cristiano Ciuti
1999
Journal Articles

Abstract

A dramatic suppression of the absorption of light by exciton polaritons is observed after resonant excitation of the polaritonic modes in a multiple quantum well Bragg structure. Time-resolved reflectivity measurements confirm that this is due to the formation of a dominant superradiant polariton mode created by the light-induced coupling of excitons in different quantum wells that suppress absorption. The stability of the superradiant mode is demonstrated at high excitation powers and at temperatures of up to 180 K.

Official source

https://infoscience.epfl.ch/entities/publication/79daad45-079b-45e7-a7d1-412be031962d

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Benoît Marie Joseph Deveaud, Ursula Oesterle, Jean-Louis Staehli, Cristiano Ciuti
1999
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/79daad45-079b-45e7-a7d1-412be031962d

About this result

Related concepts (27)

Quantum well

A quantum well is a potential well with only discrete energy values. The classic model used to demonstrate a quantum well is to confine particles, which were initially free to move in three dimensions, to two dimensions, by forcing them to occupy a planar region. The effects of quantum confinement take place when the quantum well thickness becomes comparable to the de Broglie wavelength of the carriers (generally electrons and holes), leading to energy levels called "energy subbands", i.e.

Quantum dot

Quantum dots (QDs) – also called semiconductor nanocrystals, are semiconductor particles a few nanometres in size, having optical and electronic properties that differ from those of larger particles as a result of quantum mechanics. They are a central topic in nanotechnology and materials science. When the quantum dots are illuminated by UV light, an electron in the quantum dot can be excited to a state of higher energy. In the case of a semiconducting quantum dot, this process corresponds to the transition of an electron from the valence band to the conductance band.

Quantum computing

A quantum computer is a computer that exploits quantum mechanical phenomena. At small scales, physical matter exhibits properties of both particles and waves, and quantum computing leverages this behavior, specifically quantum superposition and entanglement, using specialized hardware that supports the preparation and manipulation of quantum states. Classical physics cannot explain the operation of these quantum devices, and a scalable quantum computer could perform some calculations exponentially faster than any modern "classical" computer.

Related publications (11)

Suppression of exciton-polariton light absorption in multiple quantum well Bragg structures

Chat with Graph Search

Cryogenic HEMT-based devices and circuits for quantum computing

Integrated multiplexed microwave readout of silicon quantum dots in a cryogenic CMOS chip

Is luminescence from quantum wells due to excitons?