Scheme for media conversion between electronic spin and photonic orbital angular momentum based on photonic nanocavity

Chee Fai Fong, Yasutomo Ota, Satoshi Iwamoto, Yasuhiko Arakawa

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Light with nonzero orbital angular momentum (OAM) or twisted light is promising for quantum communication applications such as OAM-entangled photonic qubits. Methods and devices for the conversion of the photonic OAM to photonic spin angular momentum (SAM), as well as for the photonic SAM to electronic SAM transformation are known but the direct conversion between the photonic OAM and electronic SAM is not available within a single device. Here, we propose a scheme which converts photonic OAM to electronic SAM and vice versa within a single nanophotonic device. We employed a photonic crystal nanocavity with an embedded quantum dot (QD) which confines an electron spin as a stationary qubit. The confined spin-polarized electrons could recombine with holes to give circularly polarized emission, which could drive the rotation of the nanocavity modes via the strong optical spin-orbit interaction. The rotating modes then radiate light with nonzero OAM, allowing this device to serve as a transmitter. As this can be a unitary process, the time-reversed case enables the device to function as a receiver. This scheme could be generalized to other systems with a resonator and quantum emitters such as a microdisk and defects in diamond for example. Our scheme shows the potential for realizing an (ultra)compact electronic SAM-photonic OAM interface to accommodate OAM as an additional degree of freedom for quantum information purposes.

本文言語English
ページ(範囲)21219-21234
ページ数16
ジャーナルOptics Express
26
16
DOI
出版ステータスPublished - 2018 8 6
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学

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