TY - GEN
T1 - Efficient terahertz-wave generation in mid-infrared quantum-cascade lasers with a common dual-upper-state active region
AU - Fujita, K.
AU - Ito, A.
AU - Hitaka, M.
AU - Dougakiuchi, T.
AU - Edamura, T.
AU - Yamanishi, M.
AU - Jung, S.
AU - Belkin, M. A.
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/11/11
Y1 - 2015/11/11
N2 - We report the performance of room temperature, single mode terahertz sources based on intracavity difference frequency generation in mid-infrared quantum cascade lasers with a common dual-upper-state (DAU) active region. As a result of designing of DAU active region for giant optical nonlinearity, the DAU devices with a dual-period buried distributed feedback grating operate in two single-mode mid-infrared wavelengths at 10.7 um and 9.7 um, and produce single-mode THz output at ∼2.9 THz with a side mode suppression ratio of ∼25 dB. A high mid-infrared to THz conversion efficiency of 0.8 mW/W is obtained at room temperature.
AB - We report the performance of room temperature, single mode terahertz sources based on intracavity difference frequency generation in mid-infrared quantum cascade lasers with a common dual-upper-state (DAU) active region. As a result of designing of DAU active region for giant optical nonlinearity, the DAU devices with a dual-period buried distributed feedback grating operate in two single-mode mid-infrared wavelengths at 10.7 um and 9.7 um, and produce single-mode THz output at ∼2.9 THz with a side mode suppression ratio of ∼25 dB. A high mid-infrared to THz conversion efficiency of 0.8 mW/W is obtained at room temperature.
UR - http://www.scopus.com/inward/record.url?scp=84969199744&partnerID=8YFLogxK
U2 - 10.1109/IRMMW-THz.2015.7327480
DO - 10.1109/IRMMW-THz.2015.7327480
M3 - Conference contribution
AN - SCOPUS:84969199744
T3 - IRMMW-THz 2015 - 40th International Conference on Infrared, Millimeter, and Terahertz Waves
BT - IRMMW-THz 2015 - 40th International Conference on Infrared, Millimeter, and Terahertz Waves
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 40th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2015
Y2 - 23 August 2015 through 28 August 2015
ER -