Title :
Superheterodyne amplification of optical and terahertz pulses in n-GaN films
Author :
Grimalsky, V.V. ; Koshevaya, S.V. ; Zamudio-Lara, A. ; Rapoport, Yu.G.
Author_Institution :
CIICAp, Autonomous Univ. of Morelos (UAEM), Cuernavaca, Mexico
Abstract :
The superheterodyne amplification of electromagnetic (EM) pulses of optical and terahertz ranges is investigated under the three-wave interaction with the space charge wave (SCW) in n-GaN films. SCW is amplified due to the negative differential conductivity at the frequencies f ≤ 500 GHz. The three-wave resonant interaction of two counterpropagating EM waves with SCW is considered in the waveguides based on n-GaN film onto a dielectric substrate. The amplification of EM pulses of the optical range can reach 20...40 dB at the waveguide lengths ≤100 μm.
Keywords :
III-V semiconductors; amplification; gallium compounds; integrated optics; microwave photonics; optical films; optical waveguides; space charge waves; terahertz waves; wide band gap semiconductors; GaN; counterpropagating electromagnetic waves; dielectric substrate; negative differential conductivity; optical pulse; optical waveguides; space charge wave; superheterodyne amplification; terahertz pulses; three-wave resonant interaction; Gallium nitride; Microwave amplifiers; Optical films; Optical waveguides; Stimulated emission; electromagnetic pulses; n-GaN film; negative differential conductivity; space charge wave; superheterodyne amplification;
Conference_Titel :
Microwaves, Radar and Remote Sensing Symposium (MRRS), 2011
Conference_Location :
Kiev
Print_ISBN :
978-1-4244-9641-9
DOI :
10.1109/MRRS.2011.6053603
