Talbot Effect for Exciton Polaritons

Date

2016

Authors

Gao, Tingge
Estrecho, Eliezer (Eli)
Li, Guangyao (Leo)
Egorov, Oleg A
Ma, X
Winkler, Karol
Kamp, Martin
Schneider, C
Hofling, Sven
Truscott, Andrew

Journal Title

Journal ISSN

Volume Title

Publisher

American Physical Society

Abstract

e demonstrate, experimentally and theoretically, a Talbot effect for hybrid light-matter waves—an exciton-polariton condensate formed in a semiconductor microcavity with embedded quantum wells. The characteristic “Talbot carpet” is produced by loading the exciton-polariton condensate into a microstructured one-dimensional periodic array of mesa traps, which creates an array of phase-locked sources for coherent polariton flow in the plane of the quantum wells. The spatial distribution of the Talbot fringes outside the mesas mimics the near-field diffraction of a monochromatic wave on a periodic amplitude and phase grating with the grating period comparable to the wavelength. Despite the lossy nature of the polariton system, the Talbot pattern persists for distances exceeding the size of the mesas by an order of magnitude. Thus, our experiment demonstrates efficient shaping of the two-dimensional flow of coherent exciton polaritons by a one-dimensional “flat lens.”

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Citation

Source

Physical Review Letters

Type

Journal article

Book Title

Entity type

Access Statement

Open Access

License Rights

DOI

10.1103/PhysRevLett.117.097403

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