Miniband transmission in a photonic crystal coupled-resonator optical waveguide

We demonstrate in the near infrared the coupled-resonator optical waveguide (CROW) concept that was recently proposed by Yariv ct al. [Opt. Lett. 24, 711 (1999)]. Two-dimensional photonic crystals have been used to define, in a GaAs-based waveguiding heterostructure, an array of micrometer-sized hex agonal cavities coupled through thin walls. With the photoexcitation of InA s quantum dots as an internal source, the transmission spectra of the coupl ed resonators show marked minibands and minigaps, in agreement with theoret ical predictions. (C) 2001 Optical Society of America.