School of
Information Technology and Electrical Engineering

Terahertz quantum cascade lasers: physics and challenges in design, growth and fabrication

Dragan Indjin, Institute for Microwaves and Photonics, School of Electronic and Electrical Engineering, University of Leeds, UKTue, 09/04/2013 - 13:00
Aleksandar Rakic

Terahertz quantum-cascade lasers (THz QCLs), first realised in 2002, have now reached technological maturity. However, with maximum operating temperatures around 200K in pulsed mode, and ~ 250K in the strong magnetic field, a number of milestones have yet to be reached in order to achieve full commercialization potential. In this talk, we will focus on the underlying physics, recent design and modelling issues as well as on challenges in the growth, fabrication, and characterization of the device. Recent realisations, including electrically tunable heterogeneous cascade QCL and ambipolar dual-frequency QCL will be also discussed. Leeds experience in joint work and day-to-day interaction between the design/modelling and growth/fabrication/characterization teams will be shared with the auditorium.


Dr Indjin is Reader in Optoelectronics and Nanoscale Electronics at the School of Electronic and Electrical Engineering, University of Leeds and a member of the Institute of Microwaves and Photonics.  The School achieved outstanding results in the last UK’s Research Assessment Exercise (RAE2008) being rated as Number 1 between all schools of Electrical Engineering in UK. In 2005 he has been awarded a prestigious RC-UK Academic Fellowship to work on the new generation of semiconductor components for photonic applications. He has published more than 140 journal papers, contributed to more than 100 conference presentations and given a number of invited seminars and talks.

Seminar Type: 

ITEE Research Seminar