Observation of an exceptional point in a chaotic optical microcavity

We present spectroscopic observation of an exceptional point or the transition point between mode crossing and avoided mode crossing of neighboring quasieigenmodes in a chaotic optical microcavity of a large size parameter. The transition to the avoided mode crossing was impeded until the degree of...

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Bibliographic Details
Published in:Physical review letters 2009-09, Vol.103 (13), p.134101-134101, Article 134101
Main Authors: Lee, Sang-Bum, Yang, Juhee, Moon, Songky, Lee, Soo-Young, Shim, Jeong-Bo, Kim, Sang Wook, Lee, Jai-Hyung, An, Kyungwon
Format: Article
Language:English
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Summary:We present spectroscopic observation of an exceptional point or the transition point between mode crossing and avoided mode crossing of neighboring quasieigenmodes in a chaotic optical microcavity of a large size parameter. The transition to the avoided mode crossing was impeded until the degree of deformation exceeded a threshold deformation owing to the system's openness also enhanced by the shape deformation. As a result, a singular topology was observed around the exceptional point on the eigenfrequency surfaces, resulting in fundamental inconsistency in mode labeling.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.103.134101