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Terahertz quantum-cascade laser operating up to 137 K.

Journal Article · · Proposed for publication in Applied Physics Letters.
OSTI ID:1005069

We report operation of a terahertz quantum-cascade laser at 3.8 THz ({lambda} {approx} 79 {micro}m) up to a heat-sink temperature of 137 K. A resonant phonon depopulation design was used with a low-loss metal-metal waveguide, which provided a confinement factor of nearly unity. A threshold current density of 625 A/cm{sup 2} was obtained in pulsed mode at 5 K. Devices fabricated using a conventional semi-insulating surface-plasmon waveguide lased up to 92 K with a threshold current density of 670 A/cm{sup 2} at 5 K.

Research Organization:
Sandia National Laboratories
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
OSTI ID:
1005069
Report Number(s):
SAND2003-3252J
Journal Information:
Proposed for publication in Applied Physics Letters., Journal Name: Proposed for publication in Applied Physics Letters. Journal Issue: 25 Vol. 83; ISSN APPLAB; ISSN 0003-6951
Country of Publication:
United States
Language:
English

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