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Quasiscarred modes and their branching behavior at an exceptional point
1Max-Planck Institute for Physics of Complex Systems, Nöthnitzer Strasse 38, Dresden, Germany.
Summary
We investigated quasiscarring (QS) phenomena and mode branching in deformed microcavities. At exceptional points (EPs), QS modes branch into distinct patterns, revealing insights into light dynamics.
Area of Science:
- Physics
- Optics
- Quantum mechanics
Background:
- Microcavities exhibit complex light dynamics, particularly near exceptional points (EPs).
- Quasiscarring (QS) phenomena and mode branching are key features influencing optical behavior in these systems.
Purpose of the Study:
- To investigate quasiscarring phenomena and mode branching at exceptional points (EPs) in deformed microcavities.
- To understand the origin of QS mode behavior and its dependence on cavity deformation.
Main Methods:
- Analysis of quasiscarring phenomena in typically deformed microcavities.
- Study of mode branching patterns at exceptional points (EPs).
- Application of short-time ray dynamics to understand QS mode patterns near critical lines.
Main Results:
- Quasiscarred (QS) modes are dominant in specific mode groups and their patterns correlate with short-time ray dynamics.
- Increasing cavity deformation leads to opposite branching of high-Q and low-Q QS modes at an EP.
- Two robust mode types, QS and diamond patterns, emerge from this branching behavior.
- Similar branching is observed at a second EP at higher deformation.
Conclusions:
- Exceptional points (EPs) act as square-root branch points, driving the observed branching behavior of QS modes.
- The study provides a framework for understanding mode behavior and light localization in deformed optical systems.
- These findings have implications for designing microcavity devices with tailored optical properties.
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