Photon Phase Shift at the Few-Photon Level and Optical Switching by a Quantum Dot in a Microcavity

被引：16

作者：

Wells, L. M. ^{[1
,2
]}

Kalliakos, S. ^{[1
]}

Villa, B. ^{[1
,2
]}

Ellis, D. J. P. ^{[1
]}

Stevenson, R. M. ^{[1
]}

Bennett, A. J. ^{[1
,3
]}

Farrer, I. ^{[2
,4
]}

Ritchie, D. A. ^{[2
]}

Shields, A. J. ^{[1
]}

机构：

[1] Toshiba Res Europe Ltd, Cambridge Res Lab, 208 Sci Pk,Milton Rd, Cambridge CB4 0GZ, England

[2] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England

[3] Cardiff Univ, Inst Compound Semicond, Queens Bldg,5 Parade, Cardiff CF24 3AA, S Glam, Wales

[4] Univ Sheffield, Dept Elect & Elect Engn, Mappin St, Sheffield S1 3JD, S Yorkshire, England

来源：

PHYSICAL REVIEW APPLIED | 2019年 / 11卷 / 06期

基金：

英国工程与自然科学研究理事会; 欧盟地平线“2020”;

关键词：

SINGLE-ELECTRON; SPIN; ELECTRODYNAMICS; ROTATION;

D O I：

10.1103/PhysRevApplied.11.061001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We exploit the nonlinearity arising from the spin-photon interaction in an InAs quantum dot to demonstrate phase shifts of scattered light pulses at the single-photon level. Photon phase shifts of close to 90 degrees are achieved using a charged quantum dot in a micropillar cavity. We also demonstrate a photon phase switch by using a spin-pumping mechanism through Raman transitions in an in-plane magnetic field. The experimental findings are supported by a theoretical model that explores the dynamics of the system. Our results demonstrate the potential of quantum-dot-induced nonlinearities for quantum information processing.

引用

页数：6

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