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Triple-mode and quadruple-mode bandpass filters using triangular half-mode substrate integrated waveguide (HMSIW) are presented. To realize the two multi-mode filters, the triangular HMSIW cavity is perturbed by introducing via-hole arrays at different positions of the structure. The perturbation causes mode shifting of certain resonant modes near to the other resonant modes which are not affected...
Using parity-time (PT) symmetric cavities, we introduce a new family of spectral singularities with highly directional response. At these singularities the PT-symmetric cavity support a simultaneous lasing mode from one side and zero reflection mode from the opposite side.
We introduce a new method to localize lightwaves. We show how the interaction of a gain medium with a planar deep-UV plasmonic heterostructure, at its zero-vg point, strongly localizes light. A quantum-coherent drive provides a means to control the localization and dramatically improve the dynamics.
When transition metal dichalcogenide (TMDC) crystals are thinned to monolayers, they undergo an indirect to direct bandgap transition, enabling rich electroluminescent and photoluminescent behaviors. Coupling and integration of TMDC monolayers with photonic crystal and distributed Bragg reflector microcavities have recently been reported with Purcell enhancement of spontaneous emission and strong...
We demonstrate truly deep sub-wavelength nanoscale metamaterial optical nanocavities with anomalous scaling laws, by incorporating indefinite metamaterials with hyperbolic dispersion. Cavities with sizes down to ∼ λ/20 and high effective refractive index of 17.4 are realized.
We realize three-dimensional nanoscale optical cavities with anomalous scaling laws, by incorporating indefinite metamaterial with hyperbolic dispersion. Optical cavities with sizes down to ∼ λ/12 and high refractive index of 17.4 are demonstrated.
The effect of intracavity aberrated perturbation on output mode properties of a confocal unstable resonator is been experimentally researched by adopting H-S wavefront sensor and Zernike modal wavefront reconstruction. By processing the image of beam facula matrix, wavefront phase properties, Zernike aberrations, PV and RMS error, distribution of circle energy can all be acquired, so beam phase distribution...
The effect of intracavity aberrated perturbation on output mode structure properties of passive confocal unstable resonator is been experimentally researched by adopting Hartmann-Shack (H-S) wavefront sensor and Zernike modal wavefront reconstruction on the basis of numerical simulation. The results show that intracavity tilt perturbation notablely affects outcoupled intensity distribution, and will...
We demonstrate a high-Q surface-plasmon-polariton (SPP) whispering-gallery microcavity with SPP Q factors up to 1,376 plusmn 65 in the near infrared. The SPP eigenmodes are accessed evanescently using a tapered optical waveguide.
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