RECENT RESULTS

Reconfigurable metasurface for broadband polarization conversion / frequency filtering in C-Ka band

A single-layer patterned polymer surface can convert the incident linear polarization to cross polarization or circular/elliptical polarization or stop/pass the electromagnetic radiation in C-Ka band depending on the in-plane rotation angle. More details in Phys. Scr. (2026).

Double-sided grating for enhanced diffraction efficiency

Patterning a polymer layer using soft lithography with parallel grooves perfectly aligned on the top and bottom surfaces of it can increase the diffraction efficiency significantly. More details in Opt.Mat. (2026).

Comparing 1-D and 2-D patterns for sensing

1-D and 2-D patterns with highly comparable features (such as pattern height and material index) are made, coated with gold, and tested for sensing characteristics. More details in J. Opt. (IOP) (2025).

Multifunctional millimeter lens array

Millimeter lens array made on a flexible polymer substrate is studied for effects such as focusing, imaging and beam shaping, both in monochromatic and broadband white light. More details in J. Lightwave Technol. (2024).

Multi-modal sensing using plasmonic metasurface

The plasmonic metasurface made with the chosen design can sense the change in refractive index over a wide range, due to the presence of well-spaced multiple modes. More details in J. Phys. Photonics (IOP) (2024).

Laser linewidth narrowing by intra-cavity saturable absorption

A suitable length of unpumped erbium-doped fiber in an erbium-doped fiber laser cavity acts as a saturable absorber and narrows the laser linewidth without lowering the laser power. More details in Opt. Fiber Technol. (2024).