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Plasmonic dual-band waveguide with independently controllable band-notched characteristics

Published in Applied Physics Express

In this present paper, an investigation is conducted on a dual-band waveguide with independently controllable band-notched characteristics. The proposed slot structure, featuring a loaded gap, facilitates the operation of the plasmonic waveguide at two distinct frequency bands. Moreover, the working bandwidth of the waveguide can be flexibly adjust...

Mechanically tuned cholesteric elastomer waveguide slab

Published in Physica Scripta

In this research, a planar waveguide whose core is a cholesteric liquid crystalline elastomer whose helical axis is perpendicular to its planar boundaries, is studied. The electrodynamics equations are established, together with the constitutive equations. The mechanical stress is tuned through elastic deformations in the parallel direction along t...

Monotonicity-based shape reconstruction for an inverse scattering problem in a waveguide

Published in Inverse Problems

We consider an inverse medium scattering problem for the Helmholtz equation in a closed cylindrical waveguide with penetrable compactly supported scattering objects. We develop novel monotonicity relations for the eigenvalues of an associated modified near field operator, and we use them to establish linearized monotonicity tests that characterize ...

229 nm far-ultraviolet second harmonic generation in a vertical polarity inverted AlN bilayer channel waveguide

Published in Applied Physics Express

Far-UV light sources have attracted much attention for human-safe viral inactivation and bacterial disinfection. Due to large optical nonlinearity and transparency to this wavelength region, AlN is a promising material for compact and low-cost far-UV second harmonic generation (SHG) devices. In this study, a transverse quasi-phase-matched AlN chann...

3D printed variable aperture horn with modular ridges

Published in Journal of Physics Communications

3D printing technology has significant potential to modernize the student laboratory experience in the area of electromagnetic wave propagation and scattering. In this contribution, a fast and low-cost method to 3D print and metallize a variable aperture horn and waveguide launcher are presented. The launcher converts a SubMiniature version A (SMA)...

Photonic spin Hall effect with high coupling efficiency in the combined structure of periodic dielectric waveguides and ...

Published in Journal of Optics

In this paper, we discuss the photonic spin Hall effect (PSHE) in the combined structure of periodic dielectric waveguides (PDWs) and photonic crystal waveguide (PCW). By controlling the polarization of the dipole source, we have successfully achieved the arbitrary manipulation of PSHE for the PDW guided mode in our structure. The advantage of PDW ...

Characterising Dielectric-Lined Waveguides used for the Manipulation of Relativistic Electron Beams

In this thesis a characterisation of rectangular dielectric-lined waveguide used in terahertz (THz) driven manipulation of a relativistic electron beam is presented. THz driven acceleration has gained interest due to its capability of surpassing the acceleration gradient of conventional radio frequency accelerators. Dielectric-lined waveguides (DLW...

Recent progress in waveguide-integrated photodetectors based on 2D materials for infrared detection

Published in Journal of Physics D: Applied Physics

Two-dimensional (2D) materials have received extensive attention in optoelectronics because of their unique characteristics. However, due to the extremely thin thickness of 2D materials, their optical absorption is limited. In recent years, researchers have used different effects and structures to enhance the optical absorption of 2D materials. The...