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Wavelength tuning in a single mode parity-time (PT) symmetric semiconductor microring laser is demonstrated. Stable continuous tuning over a spectral range of 4 nm has been obtained at telecom wavelengths by adjusting the ambient temperature.
A semiconductor microring laser based on a dark state configuration is demonstrated. Single mode lasing is achieved by judiciously exploiting non-Hermitian exceptional points.
Single-transverse mode lasing is demonstrated in a broad-area PT-symmetric semiconductor microring arrangement. The proposed scheme is versatile, robust to fabrication errors, and allows for high brightness operation while maintaining spectral purity.
Parity-time (PT) symmetry has been recently emerged as a new paradigm for mode management in micro-cavity lasers. Single-mode lasing is demonstrated in longitudinally and transversely multi-moded PT-symmetric micro-ring arrangements.
In this paper, photonic cavities made of point defects in 2-D photonic crystals are modeled by finite-size transmission lines terminated at both ends by appropriate scalar impedances. The proposed model forms a simple transmission line resonator and is demonstrated to be quite beneficial in fast extraction of resonant frequency, quality factor, and mode profile of such photonic cavities. In this manner,...
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