Room temperature negative differential resistance in terahertz quantum cascade laser structures

Room temperature negative differential resistance in terahertz quantum cascade laser structures

Broadly tunable monolithic room-temperature terahertz quantum cascade laser sources.

Electrically pumped room-temperature semiconductor sources of tunable terahertz radiation in 1-5 THz spectral range are highly desired to enable compact instrumentation for THz sensing and spectroscopy. Quantum cascade lasers with intra-cavity difference-frequency generation are currently the only room-temperature electrically pumped semiconductor sources that can operate in the entire 1-5 THz ...

Anti-Reflective Coatings for Room Temperature Terahertz Quantum Cascade Laser Sources

and Introduction: There are currently no electrically-pumped semiconductor lasers that can operate in the 1-5 terahertz (THz) spectral range at room temperature. An alternative method of producing room temperature THz light is based on intra-cavity difference frequency generation (DFG) in dual wavelength mid-infrared quantum cascade lasers. Our THz DFG sources can provide tunable output of over...

Ethylene spectroscopy using a quasi-room-temperature quantum cascade laser.

Spectroscopic measurements on ethylene were performed using a quasi-room-temperature quantum cascade (QC) laser operated in pulsed mode in the 10.3 microm range. Using transmission spectroscopy, a broadening of the ethylene absorption spectrum was observed with increasing laser pulse duration, due to an increase of the laser linewidth. This linewidth was determined from the measured absorption ...

Room temperature negative differential resistance in molecular nanowires

Irena Kratochvilova,* Milan Kocirik, Adriana Zambova, Jeremiah Mbindyo, Thomas E. Mallouk and Theresa S. Mayer Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Praha 8, Czech Republic. E-mail: [email protected] J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskova 3, 18223 Praha 8, Czech Republic Department of Electr...