Abstract
In the past decade, tremendous development has been made in GaAs/AlGaAs based THz quantum cascade laser (QCLs), however, the maximum operating temperature is still limited below 200 K (without magnetic field). THz QCL based on difference frequency generation (DFG) represents a viable technology for room temperature operation. Recently, we have demonstrated room temperature THz emission (∼ 4 THz) up to 8.5 μW with a power conversion efficiency of 10 μW/W2. A dual-period distributed feedback grating is used to filter the mid-infrared spectra in favor of an extremely narrow THz linewidth of 6.6 GHz.
Original language | English (US) |
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Title of host publication | Terahertz Emitters, Receivers, and Applications II |
Volume | 8119 |
DOIs | |
State | Published - Oct 11 2011 |
Event | Terahertz Emitters, Receivers, and Applications II - San Diego, CA, United States Duration: Aug 21 2011 → Aug 21 2011 |
Other
Other | Terahertz Emitters, Receivers, and Applications II |
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Country/Territory | United States |
City | San Diego, CA |
Period | 8/21/11 → 8/21/11 |
Keywords
- Difference frequency generation
- III-nitride
- Quantum cascade lasers
- Terahertz
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering