Tuning out disorder-induced localization in nanophotonic cavity arrays

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2017-03-06
Sokolov, Sergei
Lian, Jin
Yüce, Emre
Combrie, Sylvain
DE ROSSİ, Alfredo
Mosk, Allard P.
Weakly coupled high-Q nanophotonic cavities are building blocks of slow-light waveguides and other nanophotonic devices. Their functionality critically depends on tuning as resonance frequencies should stay within the bandwidth of the device. Unavoidable disorder leads to random frequency shifts which cause localization of the light in single cavities. We present a new method to finely tune individual resonances of light in a system of coupled nanocavities. We use holographic laser-induced heating and address thermal crosstalk between nanocavities using a response matrix approach. As a main result we observe a simultaneous anticrossing of 3 nanophotonic resonances, which were initially split by disorder. (C) 2017 Optical Society of America