Exciton-polariton spin switches

被引：358

作者：

Amo, A. ^{[1
,2
]}

Liew, T. C. H. ^{[3
]}

Adrados, C. ^{[1
,2
]}

Houdre, R. ^{[4
]}

Giacobino, E. ^{[1
,2
]}

Kavokin, A. V. ^{[5
,6
]}

Bramati, A. ^{[1
,2
]}

机构：

[1] Univ Paris 06, Lab Kastler Brossel, Ecole Normale Super, F-75252 Paris 05, France

[2] CNRS, F-75252 Paris 05, France

[3] Ecole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, Switzerland

[4] Ecole Polytech Fed Lausanne, Inst Phys Matiere Condensee, Fac Sci Base, Stn 3, CH-1015 Lausanne, Switzerland

[5] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[6] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

来源：

NATURE PHOTONICS | 2010年 / 4卷 / 06期

基金：

英国工程与自然科学研究理事会; 瑞士国家科学基金会;

关键词：

MULTIPLE-QUANTUM WELLS; SEMICONDUCTOR MICROCAVITIES; CAVITY POLARITONS; POLARIZATION;

D O I：

10.1038/NPHOTON.2010.79

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Integrated switching devices comprise the building blocks of ultrafast optical signal processing(1,2). As the next stage following intensity switching(1,3,4), circular polarization switches(5-9) are attracting considerable interest because of their applications in spin-based architectures(10). They usually take advantage of nonlinear optical effects, and require high powers and external optical elements. Semiconductor microcavities provide a significant step forward due to their low-threshold, polarization-dependent, nonlinear emission(11,12), fast operation(13) and integrability. Here, we demonstrate a non-local, all-optical spin switch based on exciton-polaritons in a semiconductor microcavity. In the presence of a sub-threshold pump laser (dark regime), a tightly localized probe induces the switch-on of the entire pumped area. If the pump is circularly polarized, the switch is conditional on the polarization of the probe, but if it is linearly polarized, a circularly polarized probe fully determines the final polarization of the pumped area. These results set the basis for the development of spin-based logic devices, integrated in a chip(14).

引用

页码：361 / 366

页数：6

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