papers
Publications (2)
physics.optics2020
Mid-infrared monocrystalline interference coatings with excess optical loss below 10 ppm
G. Winkler, L. W. Perner, G. -W. Truong +13
We present high-reflectivity substrate-transferred single-crystal GaAs/AlGaAs interference coatings at a center wavelength of 4.54 um with record-low excess optical loss below 10 p…
physics.optics2019
Gain dynamics in a heterogeneous terahertz quantum cascade laser
C. G. Derntl, G. Scalari, D. Bachmann +4
The gain recovery time of a heterogeneous active region terahertz quantum cascade laser is studied by terahertz-pump,i terahertz-probe spectroscopy. The investigated active region,…