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Showing 1 to 6 of 6 for “"parity time symmetry"”.
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Parity-Time Symmetry in Lasers and Optoelectronic Oscillators
Parity-time (PT) symmetry, originally proposed in quantum mechanics, has been extended to photonics and microwave photonics, offering a new framework to study the interplay between gain, loss, and coupling coefficients for single-mode selection in lasers and optoelectronic oscillators (OEOs). This …
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Injection Current Modulated Parity-Time Symmetry in Coupled Semiconductor Lasers
This research investigates the characteristics of Parity Time symmetry breaking in two optically coupled, time delayed semiconductor lasers. A theoretical model is used to describe the controllable parameters in the experiment and intensity output of the coupled lasers. The PT parameters we control …
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Parity-time and supersymmetry in optics
Symmetry plays a crucial role in exploring the laws of nature. By exploiting some of the underlying analogies between the mathematical formalism of quantum mechanics and that of electrodynamics, in this dissertation we show that optics can provide a fertile ground for studying, observing, and …
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On the discrete nonlinear Schrödinger equation with PT-Symmetry
… equation (known as Ablowitz-Ladik equation) with parity-time symmetry proposed in Ablowitz and Musslimani’s paper. This includes the eigenfunctions (Jost solutions) of the associated Lax pair, the scattering data and the fundamental analytic solutions. In addition, we study the spectral properties …
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Orbital Angular Momentum Microlasers: From The First Demonstration To Ultrafast Tunability
… microlasers. Non-Hermitian photonics based on parity-time symmetry successfully expands the design freedom from real material permittivity to a complete complex domain, providing a versatile toolbox that empowers new functionalities in the realm of nanophotonics. Adapting optical …
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Non-Hermitian Whispering Gallery Mode Optical Microresonators and Their Applications
<p>Whispering-gallery-mode (WGM) optical microresonators, in which light propagates along the circular rims due to the total internal reflection, have attracted broad attention in the past two decades. Owing to the ultrahigh quality factor and the small mode volume, WGM resonators can significantly …