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Development of THz Quantum Cascade Laser as a Local Oscillator for THz Heterodyne Receivers
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yoshihisa, Irimajiri Shoichi, Shiba Norihiko, Sekine Iwao, Hosako Tomoki, Koyama Hroyuki, Maezawa Satoshi, Yamamoto |
| Copyright Year | 2010 |
| Abstract | We are developing THz-QCL (quantum cascade laser) as a local oscillator for heterodyne receivers. THz-QCLs are made of GaAs/Al0.15Ga0.85As using resonant LO phonon scattering depopulation scheme, and processed in a metal-metal waveguide using gold-gold thermo compression wafer bonding technique. CW mode operation of the THz-QCL has been achieved up to a heat-sink temperature of 74 K at the lasing frequency of 3.1 THz using a device with the size of 40 μm wide and 1.5 mm long fabricated by dry- etching method. The peak output power was measured to be about 34 μW at a heat-sink temperature of 15 K. We have also detected the QCL output with an HEB (Hot Electron Bolometer) mixer as a change in the I-V characteristic of the HEB mixer. The HEB mixers using an NbTiN ultra thin film as the superconducting material are coupled with the THz radiation by a quasi- optics twin slot antenna. The receiver noise temperature was measured to be 5600K in DSB. |
| Starting Page | 19 |
| Ending Page | 24 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| Volume Number | 110 |
| Alternate Webpage(s) | http://www.nrao.edu/meetings/isstt/papers/2011/2011101104.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
