TY  - JOUR
AU  - Sekine, Norihiko
AU  - Hosako, Iwao
PY  - 2009
DA  - 2009//
TI  - Intensity modulation of terahertz quantum cascade lasers under external light injection
T2  - Appl. Phys. Lett.
JO  - Applied Physics Letters
SP  - 201106(1
EP  - 3)
VL  - 95
KW  - QCL modulation
KW  - THz
KW  - terahertz
AB  - We investigated the light-current characteristics of terahertz (THz) quantum cascade lasers under external light injection, which excites interband transitions in the active materials. It was found that the amount of reduction in the THz power was constant for all injection currents above threshold, and the dependence of the reduction amount on the wavelength of the external light was observed to show a resonancelike feature. The dominant intensity modulation mechanism was found to be the loss change caused by interband transitions in the active region. Further, the effective coupling efficiency plays an important role in the intensity modulation.
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=630), last updated on Wed, 06 Jul 2011 09:11:20 -0500
ID  - Sekine+Hosako2009
ER  -