Artículos de revistas
Multiple Quantum Wells for P T -Symmetric Phononic Crystals
Fecha
2016-11Registro en:
Poshakinskiy, A.V.; Poddubny, A.N.; Fainstein, Alejandro; Multiple Quantum Wells for P T -Symmetric Phononic Crystals; American Physical Society; Physical Review Letters; 117; 22; 11-2016; 224302-1-224302-6
0031-9007
CONICET Digital
CONICET
Autor
Poshakinskiy, A.V.
Poddubny, A.N.
Fainstein, Alejandro
Resumen
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.