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arXiv: quant-ph/0703052

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Photovoltaic Probe of Cavity Polaritons in a Quantum Cascade Structure

Luca Sapienza 1, Raffaele Colombelli 2, Angela Vasanelli 1, Cristiano Ciuti 1, Christophe Manquest 1, Ulf Gennser 3, Carlo Sirtori 1

(2007-03-07)

The strong coupling between an intersubband excitation in a quantum cascade structure and a photonic mode of a planar microcavity has been detected by angle-resolved photovoltaic measurements. A typical anticrossing behavior, with a vacuum-field Rabi splitting of 16 meV at 78K, has been measured, for an intersubband transition at 163 meV. These results show that the strong coupling regime between photons and intersubband excitations can be engineered in a quantum cascade opto-electronic device. They also demonstrate the possibility to perform angle-resolved mid-infrared photodetection and to develop active devices based on intersubband cavity polaritons.

1:	Matériaux et Phénomènes Quantiques (MPQ)
	CNRS : FR2437 – Université Paris VII - Paris Diderot
2:	Institut d'électronique fondamentale (IEF)
	CNRS : UMR8622 – Université Paris XI - Paris Sud
3:	Laboratoire de photonique et de nanostructures (LPN)
	CNRS : UPR20

Subject

:

Physics/Quantum Physics Physics/Condensed Matter/Other

Keyword(s): intersubband polaritons – quantum cascade structure – strong coupling

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From: Luca Sapienza <>

Submitted on: Wednesday, 7 March 2007 11:35:22

Updated on: Wednesday, 7 March 2007 12:09:39