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(a) Phase-space structure formed by stable (blue) and unstable (red) manifolds of the unstable period-4 orbit with Poincaré surface of section shown in the background. Birkhoff coordinates (Ref. 8) with polar angle and incident angle of reflected ray are used for the COM described in the text. Only counterclockwise rays are considered. (b) Real-space ray motion corresponding to action transport . Refractive output occurs at and . (c) The same for action transport .
(a) Pumping configuration. A focused pump beam is incident on the cavity with a displacement at an angle with respect to the minor axis of the cavity. (b) Output imaging configuration. Output emission originating from the cavity surface with a displacement at an angle is imaged on a CCD camera when the cavity is uniformly pumped from the side.
(a) Lasing spectrum when pumped with a pump power of (gray) at and , compared with fluorescence spectrum obtained with a pump power of (black). (b) Threshold curve for the same and as (a). Threshold pump power is indicated by an arrow.
(a) Experimentally observed pumping efficiency distribution. A solid white line indicate the projected edge of the COM. (b) Observed output intensity distribution with the imaging technique described in the text. (c) Observed pumping efficiency in a circular cavity of the same size as the COM. [(d) and (e)] Phase-space distributions constructed from the observed distribution in (a) and (b), respectively.
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