Ultrafast THz Intersubband Polariton Saturable Absorber Integrated With A Quantum Cascade Frequency CombPaper (OPTO11)
Fri, 13 Nov 2020 05:45pm to 06:00pm
We devise a THz polaritonic saturable absorber exploiting ultra-strong coupled intersubband cavity polaritons generated in a multi quantum well (MQW) heterostructure. By coupling the polaritonic saturable absorber reflector with a high bandwidth heterogeneous THz QCL frequency comb (2.3-3.8 THz) we demonstrate spectral reshaping of the QCL emission and a major increase of the comb operational dynamic range up to 38% characterized by a stable single and narrow intermode beatnote.
Authors: Viti, Leonardo; Mezzapesa, Francesco; Raab, Juergen; Li, Liahne; Davies, Giles; Linfield, Edmund; Lange, Christoph; Huber, Rupert; Vitiello, Miriam
CNR-NANO, Department of Physics, University of Regensburg, School of Electronic and Electrical Engineering, University of Leeds