Quasiscarred modes and their branching behavior at an exceptional point

Abstract

We study quasiscarring phenomenon and mode branching at an exceptional point (EP) in typically deformed microcavities. It is shown that quasiscarred (QS) modes are dominant in some mode group and their pattern can be understood by short-time ray dynamics near the critical line. As cavity deformation increases, high-Q and low-Q QS modes are branching in an opposite way, at an EP, into two robust mode types showing QS and diamond patterns, respectively. Similar branching behavior can be also found at another EP appearing at a higher deformation. This branching behavior of QS modes has its origin on the fact that an EP is a square-root branch point.

5 pages, 5 figures

References in corpus (5)

• Observation of an exceptional point in a chaotic optical microcavity
• Exceptional Points in Atomic Spectra
• Husimi functions at dielectric interfaces: Inside-outside duality for optical systems and beyond
• Goos-Haenchen shift and localization of optical modes in deformed microcavities
• Coupled non-identical microdisks: avoided crossing of energy levels and unidirectional far-field emission

Cited by in corpus (2)

• Quantum noise and mode nonorthogonality in nonhermitian PT-symmetric optical resonators
• Indicators of wavefunction (de)localization in the avoided crossing in a quadrupole cavity