ETH Zurich

ETH Zurich - Quantum Optoelectronics Group

ETH Zurich is one of the leading international universities for technology and the natural sciences. It is well known for its excellent education, ground-breaking fundamental research and for implementing its results directly into practice. Founded in 1855, to researchers, it today offers an inspiring working environment, to students, a comprehensive education. ETH Zurich regularly appears at the top of international rankings as one of the best universities in the world. Twenty-one Nobel Laureates have studied, taught or conducted research at ETH Zurich, underlining the excellent reputation of the university.

The Quantum Optoelectronics Group at ETH Zurich has a long experience in the modeling, realization and development of high performance quantum cascade lasers. Among the achievements of the group we can cite the first demonstration of room temperature CW operation of a Mid-IR QCL, the development of the bound-to-continuum design approach, the operation of broadband Mid- IR QCL in external cavity and the recent demonstration of the comb operation of quantum cascade lasers.

In the THz range, our group realized the first operation of THz QCL above liquid nitrogen, the lowest achieved frequency for a THz QCL. Recently, our group has also focused on the development of photonics for THz QCLs, with the realization of collimated THz emission from a 3rd order, double-metal DFB laser and the demonstration of THz QCL oscillating in an electronic-based resonator. Focusing on active region simulation, the group has recently developed a simulation device based on the density matrix approach that can reliably predict the electronic and optical characteristics of a QCL.


Role in FLASH

ETHZ will lead WP5. It will be in charge of:

  • electrical and optical characterization of RTDs, test Ge/SiGe multilayer structures and QCL samples (WP4-WP5)
  • feedback WP2-WP4 in order to optimize the electrical injection, the waveguide fabrication and  the active region design.


People in FLASH