Title :
Distributed feedback Terahertz QCLs with a quasi-periodic Penrose patterning
Author :
Ronzani, Alberto ; Nobile, Michele ; Li, Luoqing ; Tredicucci, A. ; Linfield, Edmund ; Vitiello, M.S.
Author_Institution :
NEST, Ist. Nanosci., Scuola Normale Super., Pisa, Italy
Abstract :
We developed vertical emitting THz QCL sources having an optical resonator based on a quasi-periodic patterning of the top metal layer of a double-metal waveguide. The designed pattern induces a distributed feedback effect capable of providing optical feedback as well as vertical extraction in a sharply collimated far field.
Keywords :
distributed feedback lasers; laser feedback; optical design techniques; optical resonators; optical waveguides; quantum cascade lasers; submillimetre wave lasers; distributed feedback terahertz QCL; double-metal waveguide; optical feedback; optical resonator; quantum cascade laser; quasiperiodic Penrose patterning; quasiperiodic patterning; sharply collimated far field; top metal layer; vertical emitting THz QCL sources; vertical extraction; Distributed feedback devices; Lattices; Optical feedback; Optical resonators; Optical waveguides; Photonics; Quantum cascade lasers;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665450
