Chaos-Assisted Directional Light Emission from Microcavity Lasers

Susumu Shinohara, Max Planck Inst Phys Komplexer
Takahisa Harayama, NTT Corp.
Takehiro Fukushima, Okayama Prefectural University
Martina Hentschel, Max Planck Inst Phys Komplexer
Takahiko Sasaki, Japan Adv Inst Sci & Technol
Evgenii Narimanov, Purdue University

Date of this Version



Phys. Rev. Lett. 104, 163902

This document has been peer-reviewed.



This is the published version of Susumu Shinohara, Takahisa Harayama, Takehiro Fukushima, Martina Hentschel, Takahiko Sasaki, and Evgenii E. Narimanov. (1 December 2009). Chaos-Assisted Directional Light Emission from Microcavity Lasers. First published in the Physical Review Letters and is available online at:


We study the effect of dynamical tunneling on emission from ray-chaotic microcavities by introducing a suitably designed deformed disk cavity. We focus on its high quality factor modes strongly localized along a stable periodic ray orbit confined by total internal reflection. It is shown that dominant emission originates from the tunneling from the periodic ray orbit to chaotic ones; the latter eventually escape from the cavity refractively, resulting in directional emission that is unexpected from the geometry of the periodic orbit, but fully explained by unstable manifolds of chaotic ray dynamics. Experimentally performing selective excitation of those modes, we succeeded in observing the directional emission in good agreement with theoretical prediction. This provides decisive experimental evidence of dynamical tunneling in a ray-chaotic microcavity.


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