Exciton-Polariton Gap Solitons in Two-Dimensional Lattices

被引：123

作者：

Cerda-Mendez, E. A. ^{[1
]}

Sarkar, D. ^{[2
]}

Krizhanovskii, D. N. ^{[2
]}

Gavrilov, S. S. ^{[3
]}

Biermann, K. ^{[1
]}

Skolnick, M. S. ^{[2
]}

Santos, P. V. ^{[1
]}

机构：

[1] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany

[2] Univ Sheffield, Sheffield S3 7RH, S Yorkshire, England

[3] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

POTENTIALS;

D O I：

10.1103/PhysRevLett.111.146401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the two-dimensional gap-soliton nature of exciton-polariton macroscopic coherent phases (PMCP) in a square lattice with a tunable amplitude. The resonantly excited PMCP forms close to the negative mass M point of the lattice band structure with energy within the lattice band gap and its wave function localized within a few lattice periods. The PMCPs are well described as gap solitons resulting from the interplay between repulsive polariton-polariton interactions and effective attractive forces due to the negative mass. The solitonic nature accounts for the reduction of the PMCP coherence length and optical excitation threshold with increasing lattice amplitude.

引用

页数：5

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