Multiple Quantum Wells for PT-Symmetric Phononic Crystals

被引：28

作者：

Poshakinskiy, A. V. ^{[1
]}

Poddubny, A. N. ^{[1
]}

Fainstein, A. ^{[2
,3
]}

机构：

[1] Ioffe Inst, St Petersburg 194021, Russia

[2] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 22期

基金：

俄罗斯基础研究基金会;

关键词：

PARITY-TIME SYMMETRY; CAVITY; LASER;

D O I：

10.1103/PhysRevLett.117.224302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that the parity-time symmetry for sound is realized in laser-pumped multiple-quantum-well structures. Breaking of the parity-time symmetry for the phonons with wave vectors corresponding to the Bragg condition makes the structure a highly selective acoustic wave amplifier. Single-mode distributed feedback phonon lasing is predicted for structures with realistic parameters.

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页数：6

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