Reconfigurable polarization processor based on coherent four-port micro-ring resonator
Polarization processors with versatile functionalities are needed in optical systems, which use or manipulate polarized light. In this paper, we propose and realize an integrated polarization processor based on a coherent 4-port micro-ring resonator. The …
Multiplexing in photonics as a resource for optical ternary content-addressable memory functionality
In this paper, we combine a Content-Addressable Memory (CAM) encoding scheme previously proposed for analog electronic CAMs (E-CAMs) with optical multiplexing techniques to create two new photonic CAM architectures—wavelength-division multiplexing (WDM) …
Fast and accurate electromagnetic field calculation for substrate-supported metasurfaces using the discrete dipole approximation
Metasurface design tends to be tedious and time-consuming based on sweeping geometric parameters. Common numerical simulation techniques are slow for large areas, ultra-fine grids, and/or three-dimensional simulations. Simulation time can be reduced by …
Robust reconfigurable radiofrequency photonic filters based on a single silicon in-phase/quadrature modulator
Combining integrated photonics and radiofrequency (RF) signals in the optical domain can help overcome the limitations of traditional RF systems. However, it is challenging to achieve environmentally insensitive filtering in wireless communications using …
A low-loss molybdenum plasmonic waveguide: perfect single-crystal preparation and subwavelength grating optimization
Plasmonic waveguides have attracted tremendous interest due to efficiently confining photons on the subwavelength spatial scale to be beating the propagation diffraction limit. Transition metal molybdenum (Mo) exhibits outstanding properties in light trapping …
Controlling coherent perfect absorption via long-range connectivity of defects in three-dimensional zero-index media
Coherent perfect absorption (CPA), as time-reversed lasing, arises from appropriate wave interference within absorbers, offering flexible control over wave absorption. Typically, this control involves tuning the phase difference between two …
Dynamic propagation of an Airy beam in metasurface-enabled gradiently-aligned liquid crystals
Due to the unique self-acceleration, self-healing, and non-diffraction properties, Airy beams have been explored extensively and found applications in various fields. It has been proven as an essential aspect to tune the trajectory of Airy beams for extensive …
All-dielectric metaoptics for the compact generation of double-ring perfect vector beams
Perfect vortices, whose ring profile is independent of the topological charge, play a key role in telecommunications and particle micro-manipulation. In this work, we report the compact generation of a new kind of double-ring perfect vortices, called …
Reconfigurable nonlinear losses of nanomaterial covered waveguides
Optical waveguides covered with thin films, which transmittance can be controlled by external action, are widely used in various applications from optical modulators to saturable absorbers. It is natural to suggest that the losses through such a waveguide …
Inverse design and optical vortex manipulation for thin-film absorption enhancement
Optical vortices (OVs) have rapidly varying spatial phase and optical energy that circulates around points or lines of zero optical intensity. Manipulation of OVs offers innovative approaches for various fields, such as optical sensing, communication, and …