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All-optical switching and stimulated emission in high-Q microresonators

Dion J. W. Klunder, E. Krioukov, V.S. Kuiper, Fei Tan, Jan W. Stouwdam, Gabriël Sengo, H.J.W.M. Hoekstra, Frank C. J. M. van Veggel, Cees Otto, A. Driessen

Published Dec 19, 2001• 0 citations
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Optical single-ring resonance inherently generates Lorentzian-shape magnitude and group-delay responses, leading to critical performance limitation in photonics, cavity quantum electrodynamics, cavity optomechanics, and atomic and optical physics. Here, we propose a new type of microresonator that stimulates flat-top resonance in a single-ring cavity. By manipulating the fast and slow light effects in the microresonator, the flat-top group delay can be tuned with an ignorable magnitude variation. In addition, the bandpass response can be switched to a notch, which can enable function-reconfigurable photonic integrated circuits (PICs) without a physical change in the architecture. Our demonstration provides the possibility of developing microresonator-based PICs with unprecedented high flexibility and capacity.