Weakly coupled high-Q nanophotonic cavities are building blocks ofslow-light waveguides and other nanophotonic devices. Theirfunctionality critically depends on tuning as resonance frequenciesshould stay within the bandwidth of the device. Unavoidable disorderleads to random frequency shifts which cause localization of the lightin single cavities. We present a new method to finely tune individualresonances of light in a system of coupled nanocavities. We useholographic laser-induced heating and address thermal crosstalk betweennanocavities using a response matrix approach. As a main result weobserve a simultaneous anticrossing of 3 nanophotonic resonances, whichwere initially split by disorder.

S. Sokolov, J. Lian, E. Yüce, S. Combrié, A. De Rossi, and A. P. Mosk

2017

03/2017

Opt. Express

25

4598-4606

cavity arrays, disorder, localisation, Photonic crystal waveguides