外文题目: Exceptional Points in Random-Defect Phonon Lasers
作者: Lu, H.; Ozdemir, S. K.; Kuang, L. -M.; Nori, Franco; Jing, H.
刊名: Phys. Rev. Appl.
年: 2017 卷: 8 期: 4 文章编号：44020
英文关键词:

NON-HERMITIAN HAMILTONIANS; SYMMETRY; STATES; OPTOMECHANICS; RESONATOR; GLASSES; SOLIDS; CAVITY; QUBIT; HEAT
英文摘要:
Intrinsic defects in optomechanical devices are generally viewed to be detrimental for achieving coherent amplification of phonons, and great care has thus been exercised in fabricating devices and materials with no (or a minimal number of) defects. Contrary to this view, here we show that, by surpassing an exceptional point (EP), both the mechanical gain and the phonon number can be enhanced despite increasing defect losses. This counterintuitive effect, well described by an effective non-Hermitian phonon-defect model, provides a mechanical analog of the loss-induced purely optical lasing. This opens the way to operating random-defect phonon devices at EPs.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1103/PhysRevApplied.8.044020


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