A survey on GaN- based devices for terahertz photonics
| Autor: | Kiarash Ahi, Mehdi Anwar |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Terahertz radiation business.industry Saturation velocity Gallium nitride 02 engineering and technology Semiconductor device 021001 nanoscience & nanotechnology 01 natural sciences Terahertz spectroscopy and technology 010309 optics chemistry.chemical_compound chemistry 0103 physical sciences Optoelectronics Photonics 0210 nano-technology Terahertz time-domain spectroscopy business Diode |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2240591 |
| Popis: | With fast growing of the photonics and power electronic systems, the need for high power- high frequency semiconductor devices is sensed tremendously. GaN provides the highest electron saturation velocity, breakdown voltage and operation temperature, and thus combined frequency-power performance among commonly used semiconductors. With achieving the first THz image in just two decades ago, generation and detection of terahertz (THz) radiation is one of the most emerging photonic areas. The industrial needs for compact, economical, high resolution and high power THz imaging and spectroscopy systems are fueling the utilization of GaN for the realizing of the next generation of THz systems. As it is reviewed in this paper, the mentioned characteristics of GaN together with its capabilities of providing high 2-dimentional election densities and large longitudinal-optical phonon of ~90 meV, make it one of the most promising semiconductor materials for the future of the THz generation, detection, mixing, and frequency multiplication. GaN- based devices have shown capabilities of operating in the upper THz frequency band of 5- 12 THz with relatively high photon densities and in room temperature. As a result, THz imaging and spectroscopy systems with high resolutions and depths of penetrations can be realized via utilizing GaN- based devices. In this paper, a comprehensive review on the history and state of the art of the GaN- based electronic devices, including plasma HFETs, NDRs, HDSDs, IMPATTs, QCLs, HEMTs, Gunn diodes and TeraFETs together with their impact on the future of THz imaging and spectroscopy systems is provided. |
| Databáze: | OpenAIRE |
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