| Research Project: Terahertz Quantum Cascade Lasers |
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The group currently concentrates on the physics and applications of
semiconductor quantum devices, and THz quantum cascade lasers. We are investigating physical and engineering issues relevant to devices operating in the under-utilized millimeter-wave, terahertz, and infrared frequencies. This frequency range has great potential for applications in remote sensing, spectroscopy, plasma diagnostics, and communications.
For more info, see our RLE Progress Report |
| Selected Research Publications |
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Sushil Kumar, Benjamin S. Williams, Stephen Kohen, Qing Hu, and John L. Reno, "Continuous-wave operation of terahertz quantum-cascade lasers above liquid-nitrogen temperature," Appl. Phys. Lett. 84, 2494 (2004). Hans Callebaut, Sushil Kumar, Benjamin S. Williams, Qing Hu, and John L. Reno, "Importance of electron-impurity scattering for electron transport in terahertz quantum-cascade lasers," Appl. Phys. Lett. 84, 645 (2004). Benjamin S. Williams, Sushil Kumar, Hans Callebaut, Qing Hu, and John L. Reno, "Terahertz quantum-cascade laser operating up to 137 K," Appl. Phys. Lett. 83, 5142 (2003). Benjamin S. Williams, Sushil Kumar, Hans Callebaut, Qing Hu, and John L. Reno, "Terahertz quantum-cascade laser at lambda approx 100 um using metal waveguide for mode confinement," Appl. Phys. Lett. 83, 2124 (2003). Hans Callebaut, Sushil Kumar, Benjamin S. Williams, Qing Hu, and John L. Reno, "Analysis of transport properties of terahertz quantum cascade lasers," Appl. Phys. Lett. 83, 207 (2003). Benjamin S. Williams, Hans Callebaut, Sushil Kumar, Qing Hu, and John L. Reno, "3.4-THz quantum cascade laser based on longitudinal-optical-phonon scattering for depopulation," Appl. Phys. Lett. 82, 1015 (2003).
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Last modified: July, 2004