Compositionally controlled plasmonics in amorphous semiconductor metasurfaces

Chemically controlled bending of compositionally anisotropic microcylinders.

Soft materials that can undergo mechanical actuation in response to external stimuli, such as changes in temperature, light, pH value, or ionic strength, have attracted increasing attention because of their potential use as thinfilm actuators, smart sutures, and soft robots. These materials typically require specialty polymers, such as shape-memory polymers or use macroscopically layered films....

High-responsivity plasmonics-based GaAs metal-semiconductor-metal photodetectors

photodetectors Ayman Karar, Narottam Das, Chee Leong Tan, Kamal Alameh, Yong Tak Lee, and Fouad Karouta Electron Science Research Institute, Edith Cowan University, Joondalup, WA, Australia School of Photonics Science, Gwangju Institute of Science and Technology (GIST), Gwangju, South Korea Department of Information and Communications, GIST, Gwangju, South Korea Department of Nanobio Materials ...

Nanophotonics Based on Semiconductor-Photonic Crystal/Quantum Dot and Metal-/Semiconductor-Plasmonics

This paper reviews our recent activities on nanophotonics based on a photonic crystal (PC)/quantum dot (QD)-combined structure for an all-optical device and a metal/semiconductor composite structure using surface plasmon (SP) and negative refractive index material (NIM). The former structure contributes to an ultrafast signal processing component by virtue of new PC design and QD selective-area...

Optical metasurfaces for polarization-controlled beam shaping.

We have developed multifunctional optical beam shapers based on plasmonic metasurfaces. The metasurfaces are composed of subwavelength-spaced polarization- and wavelength-selective optical nanoantennas that allow encoding several beam shapers on a single element. We demonstrate numerically and experimentally beam shapers that can be used to switch between arbitrary beam shapes. We specifically ...

Holographic Recording in Amorphous Chalcogenide Semiconductor Thin Films