TY - GEN
T1 - Low-threshold quantum-cascade lasers without injector regions, emitting at λ ∼ 6.7 μm
AU - Friedrich, A.
AU - Boehm, G.
AU - Amann, M. C.
PY - 2006
Y1 - 2006
N2 - We report on an unusual quantum-cascade laser design without injector miniband, designed as a five-level staircase. The aim of this design scheme is to prevent a thermal backfilling of the lower laser state, by using a double or triple LO-phonon resonance, respectively. These lasers show exceedingly small threshold current densities at low temperatures (0.2 kA/cm2 at 77 K) and a threshold voltage of about 10 V. At 300 K, threshold current densities of ∼ 2 kA/cm2 are achieved and the maximum operating temperature in pulsed mode is 380 K.
AB - We report on an unusual quantum-cascade laser design without injector miniband, designed as a five-level staircase. The aim of this design scheme is to prevent a thermal backfilling of the lower laser state, by using a double or triple LO-phonon resonance, respectively. These lasers show exceedingly small threshold current densities at low temperatures (0.2 kA/cm2 at 77 K) and a threshold voltage of about 10 V. At 300 K, threshold current densities of ∼ 2 kA/cm2 are achieved and the maximum operating temperature in pulsed mode is 380 K.
UR - https://www.scopus.com/pages/publications/33749987103
M3 - Conference contribution
AN - SCOPUS:33749987103
SN - 0780395581
SN - 9780780395589
T3 - Conference Proceedings - International Conference on Indium Phosphide and Related Materials
SP - 19
EP - 22
BT - 2006 International Conference on Indium Phosphide and Related Materials Conference Proceedings
T2 - 2006 International Conference on Indium Phosphide and Related Materials Conference Proceedings
Y2 - 7 May 2006 through 11 May 2006
ER -