典型文献
Direct observation of zero modes in a non-Hermitian optical nanocavity array
文献摘要：
Zero modes are symmetry protected ones whose energy eigenvalues have zero real parts.In Hermitian arrays,they arise as a consequence of the sublattice symmetry,implying that they are dark modes.In non-Hermitian systems that naturally emerge in gain/loss optical cavities,particle-hole symmetry prevails instead;the resulting zero modes are no longer dark but feature π/2 phase jumps between adjacent cavities.Here,we report on the direct observation of zero modes in a non-Hermitian three coupled photonic crystal nanocavities array containing quan-tum wells.Unlike the Hermitian counterparts,the observation of non-Hermitian zero modes upon single pump spot illumination requires vanishing sublattice detuning,and they can be identified through far-field imaging and spectral filtering of the photoluminescence at selected pump locations.We explain the zero-mode coalescence as a parity-time phase transition for small coupling.These zero modes are robust against coupling disorder and can be used for laser mode engineering and photonic computing.
文献关键词：
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作者姓名：
FLORE HENTINGER;MELISSA HEDIR;BRUNO GARBIN;MATHIAS MARCONI;LI GE;FABRICE RAINERI;JUAN A.LEVENSON;ALEJANDRO M.YACOMOTTI
作者机构：
Centre de Nanosciences et de Nanotechnologies,CNRS,Université Paris-Sud,Université Paris-Saclay,91120 Palaiseau,France;Université C?te d'Azur,Institut de Physique de Nice,CNRS-UMR 7010,Sophia Antipolis,France;Department of Physics and Astronomy,College of Staten Island,CUNY,Staten Island,New York 10314,USA;Graduate Center,CUNY,New York,New York 10016,USA;Université de Paris,75205 Paris Cedex 13,France
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引用格式：
[1]FLORE HENTINGER;MELISSA HEDIR;BRUNO GARBIN;MATHIAS MARCONI;LI GE;FABRICE RAINERI;JUAN A.LEVENSON;ALEJANDRO M.YACOMOTTI-.Direct observation of zero modes in a non-Hermitian optical nanocavity array)[J].光子学研究（英文）,2022(02):574-586
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0.601499
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