http://tia.ucsb.edu/self-assembled-semimetallic-nanowire-composite-as-broadband-terahertzinfrared-polarizer-2013-895/
Background
Terahertz (THz) and infrared (IR) radiation are important tools for imaging and research. Current commercially available THz polarizers are made of wire grids, which require a minimum spacing of around 10 µm. This reduces the polarization extinction ratio in the high THz range where the wavelength is shorter than 10 times of the wire spacing. Furthermore, the requirement of a transparent substrate tends to limit the application at frequencies between 3-20 THz.
Description
Researchers at the University of California, Santa Barbara have developed a novel self-assembled semi-metallic nanowire composite for use as a broadband polarizer for THz and IR applications. Using the self-assembly method, the wire spacing is in the 1 nm range with a material thickness of the order of micrometers. The invention, therefore, covers a frequency range of 0.2 to 100 THz. Moreover, since the invention is based on conventional II-V semiconductors, it is easily compatible with various optoelectronic devices.
Advantages
- Broader frequency range
- Easily integrated with optoelectronic devices
- More advanced functionality
- Manufacturing freedom
Applications
- IR Cameras
- Quantum Cascade Lasers
- Vertical Cavity Surface Emitting Lasers
- Medical Imaging
This technology is available for licensing. Click here for more information.
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