Quasi-periodic surface plasmon gratings based on the Fibonacci sequence are studied as distributed feedback resonators for terahertz quantum cascade lasers. The simulations indicate a quality factor comparable with standard DFB resonators. The fabricated devices show grating-dependent emission, but suppression of higher transverse waveguide modes will be necessary to unambiguously identify the fundamental resonance frequencies of the grating. (C) 2007 Elsevier B.V. All rights reserved.
File in questo prodotto:
Non ci sono file associati a questo prodotto.