Wide-angle broadband absorption in tapered patch antennas.

Strip array is a classical antenna structure, which provides an effective way to generate and explore new material properties and device functionalities. In this paper, we demonstrate wide-angle broadband absorption in patch antennas made of tapered strip arrays in the metal-insulator-metal geometry. By superimposing multiple resonances associated with the tapered width of the strips, near-perfect absorption is designed and realized over a wide bandwidth from 29.

Optical and Electronic Properties of Femtosecond Laser-Induced Sulfur-Hyperdoped Silicon N+/P Photodiodes.

Impurity-mediated near-infrared (NIR) photoresponse in silicon is of great interest for photovoltaics and photodetectors. In this paper, we have fabricated a series of n/p photodetectors with hyperdoped silicon prepared by ion-implantation and femtosecond pulsed laser. These devices showed a remarkable enhancement on absorption and photoresponse at NIR wavelengths.

Broadband and highly absorbing multilayer structure in mid-infrared.

In this paper, we have designed and experimentally demonstrated a broadband absorber in the mid-infrared region based on the impedance matching method. The absorber is made of planar multilayered dielectric and metallic films without involving lithography in fabrication. Our measurements reveal high absorption over 85% in the wavelength range of 2.