Non-Hermitian engineering for brighter broadband pseudothermal light
Non-Hermitian engineering for brighter broadband pseudothermal light
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DOI：
10.1103/physreva.100.043805
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发表时间：
2019-01
影响因子：
2.9
通讯作者：
N. Quesada;Eugene Adjei;R. El-Ganainy;Agata M. Bra'nczyk
中科院分区：
文献类型：
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作者：
N. Quesada;Eugene Adjei;R. El-Ganainy;Agata M. Bra'nczyk
我们证明非厄米工程可以在量子系统中发挥积极作用。这与广泛接受的观念形成鲜明对比，即光学损耗是必须消除或至少最小化的缺点。我们利用非线性相互作用和损耗之间的相互作用来证明光谱损耗工程可以放宽相位匹配条件，从而能够在新频率下生成宽带赝热态。这为充分利用半导体材料的潜力打开了大门，这些半导体材料表现出巨大的非线性，但缺乏实现准相位匹配的必要成分。这反过来可能为构建片上量子光源铺平道路。
We show that non-Hermitian engineering can play a positive role in quantum systems. This is in contrast to the widely accepted notion that optical losses are a drawback that must be eliminated or, at least, minimized. We take advantage of the interplay between nonlinear interactions and loss to show that spectral-loss engineering can relax phase-matching conditions, enabling generation of broadband pseudothermal states at new frequencies. This opens the door for utilizing the full potential of semiconductor materials that exhibit giant nonlinearities but lack the necessary ingredients for achieving quasi-phase-matching. This in turn may pave the way for building on-chip quantum light sources.