Global ETD Search
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Showing 1 to 8 of 8 for “"exceptional point"”.
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Concentric Microresonators Design For Dispersion Engineering and Scalable Electron-Beam Lithography for Si and SiN Photonic Platforms
… device geometries. Using this process, an exceptional-point (EP) waveguide was demonstrated with symmetric transmission and constant radiation at the EP wavelength. Additionally, a dual-bus racetrack resonator for broadband coupling was fabricated on both Si and SiN platforms using a common …
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Wave transport in parity-time symmetric, time-varying, and quasi-periodic systems
… proposed a sensing circuit based on sixth-order exceptional point (EP), which supports high sensitivity, resolution, and nondegraded thermal noise performance compared with conventional diabolic point (DP) sensing system. I also studied the influence of thermal noise in a general two-level …
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Orbital Angular Momentum Microlasers: From The First Demonstration To Ultrafast Tunability
… By tailoring the complex index modulations at an exceptional point (EP) on a microring laser, we demonstrated the very first OAM microlaser of which both the topological charge and the polarization state can be designed on demand. More recently, we successfully promoted the OAM microlaser …
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Breaking the Cycle: the Rise and Fall of Conversion Cycle Limited Three-Wave Mixing
… signal and idler second harmonic fields at all points in transverse space and time. We develop a damped Duffing oscillator model that unifies the description of conventional OPA with OPAs that use linear absorption \cite{Ma:15, El-Ganainy:15, Zhong:16, Li:17, Ma:17} or SHG \cite{Flemens:21} to …
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Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application
… Dynamics surrounding PT-symmetry breaking and exceptional points are also studied using pole-zero analysis. By tuning the coupled lasers to an exceptional point, the array supermodes become indistinguishable, and the coupled-laser array forces the input signals into synchrony. Experimentally, …
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Parity-Time Symmetry in Lasers and Optoelectronic Oscillators
… of PT symmetry into photonic circuits, and exceptional point (EP)-enhanced sensing technologies.
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Non-Hermitian Whispering Gallery Mode Optical Microresonators and Their Applications
… of non-Hermitian degeneracies, also known as exceptional points (EPs), at which both the eigenvalues and the corresponding eigenstates coalesce. This is in stark contrast with conventional Hermitian degeneracies, where only the eigenvalues are degenerate, but the associated eigenstates can …
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The taiji and infinity-loop microresonators: examples of non-hermitian photonic systems
… shaped like the infinity symbol coupled at two points to the bus waveguide. To get an accurate picture of the three devices, they were modeled using both the transfer matrix method and the temporal coupled mode theory. Neglecting propagation losses, the MR is described by a Hermitian …