Nonlinear resonance-assisted tunneling induced by microcavity deformation

Area of Science:

• Photonics
• Quantum Optics
• Cavity Quantum Electrodynamics

Background:

• Noncircular two-dimensional microcavities offer directional light output and confinement, crucial for photonics.
• Controlling intermode interactions in these microcavities is key for novel functionalities and enhanced light-matter coupling.
• The interaction Hamiltonian from cavity deformation is largely unknown, hindering practical applications.

Purpose of the Study:

• To experimentally observe resonance-assisted tunneling in deformed two-dimensional microcavities.
• To understand and control intermode interactions induced by cavity deformation.
• To establish a selection rule for strong intermode interactions.

Main Methods:

• Experimental observation of resonance-assisted tunneling.
• Analysis of intracavity ray dynamics and phase space.
• Identification of a selection rule based on angular quantum numbers.

Main Results:

• First experimental observation of resonance-assisted tunneling in deformed 2D microcavities.
• Demonstration that tunneling induces strong intermode interactions in mixed phase space.
• Quantification of interaction strength via separatrix area in phase space.
• Discovery of a selection rule for strong interactions based on angular quantum numbers.

Conclusions:

• Resonance-assisted tunneling is the mechanism driving strong intermode interactions in these systems.
• Interaction strength is quantifiable through phase space analysis.
• The findings provide accessible methods for controlling intermode interactions.
• Applicable to other physical systems exhibiting mixed phase space dynamics.