36 research outputs found
Design of resonant microcavities: application to optical gyroscopes
We study theoretically and numerically the effect of rotation on resonant
frequencies of microcavities in a rotating frame of reference. Cavity rotation
causes the shifts of the resonant frequencies proportional to the rotation rate
if it is larger than a certain value. Below the value, a region of rotation
rate exists where there is no resulting the frequency shifts proportional to
the rotation rate. We show that designing cavity symmetry as () can eliminate this region.Comment: 10 page
Boundary element method and isospectrality in quantum billiards(Perspectives of Nonequilibrium Statistical Physics-The Memory of Professor Shuichi Tasaki-)
この論文は国立情報学研究所の電子図書館事業により電子化されました。An application of Fredholm theory to the boundary element method and its association to the Kac's inverse question "can one hear the shape of a drum?" are reviewed
Classical Phase Space Revealed by Coherent Light
We study the far field characteristics of oval-resonator laser diodes made of
an AlGaAs/GaAs quantum well. The resonator shapes are various oval geometries,
thereby probing chaotic and mixed classical dynamics. The far field pattern
shows a pronounced fine structure that strongly depends on the cavity shape.
Comparing the experimental data with ray-model simulations for a Fresnel
billiard yields convincing agreement for all geometries and reveals the
importance of the underlying classical phase space for the lasing
characteristics.Comment: 4 pages, 5 figures (reduced quality), accepted for publication in
Physical Review Letter
Light emission patterns from stadium-shaped semiconductor microcavity lasers
We study light emission patterns from stadium-shaped semiconductor (GaAs)
microcavity lasers theoretically and experimentally. Performing systematic wave
calculations for passive cavity modes, we demonstrate that the averaging by
low-loss modes, such as those realized in multi-mode lasing, generates an
emission pattern in good agreement with the ray model's prediction. In
addition, we show that the dependence of experimental far-field emission
patterns on the aspect ratio of the stadium cavity is well reproduced by the
ray model.Comment: 5 pages, 4 figure