Extreme Sensitivity of Output Directionality to Boundary Perturbation in Wavelength-Scale Microcavities
arXiv:1208.0792 · doi:10.1103/PhysRevA.87.023833
Abstract
We report a surprising observation that the output directionality from wavelength-scale optical microcavities displays extreme sensitivity to deformations of the cavity shape. A variation of the cavity boundary on the order of ten thousandth of a wavelength may flip the output directions by 180 degrees. Our analysis based on a perturbation theory reveals that a tiny shape variation can cause a strong mixing of nearly degenerate cavity resonances with different angular momenta, and their interference determines the farfield emission pattern. This work shows the possibility of utilizing carefully-designed wavelength-scale microcavities for high-resolution detection and sensing applications.
5 pages, 4 figures
References in corpus (7)
- Coherent Perfect Absorbers: Time-reversed Lasers
- Detecting single viruses and nanoparticles using whispering gallery microlasers
- Combining directional light output and ultralow loss in deformed microdisks
- Formation of long-lived, scarlike modes near avoided resonance crossings in optical microcavities
- Chaos-assisted directional light emission from microcavity lasers
- Classical Phase Space Revealed by Coherent Light
- Observations of interior whispering gallery modes in asymmetric optical resonators with rational caustics
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- Corrected perturbation theory for transverse-electric whispering-gallery modes in deformed microdisks
- Spectral Properties and Dynamical Tunneling in Constant-Width Billiards
- Dielectric Square Resonator Investigated with Microwave Experiments
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