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Novel concept for THz signals generation in heterostructures
Author(s) -
Ong Duu Sheng,
Hartnagel Hans L.
Publication year - 2007
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200701067
Subject(s) - terahertz radiation , heterojunction , schematic , electron , reflection (computer programming) , ballistic conduction , physics , range (aeronautics) , monte carlo method , optics , optoelectronics , materials science , computer science , quantum mechanics , mathematics , electrical engineering , engineering , statistics , composite material , programming language
We demonstrate by a Monte Carlo simulation that the reflection of quasi‐ballistically accelerated electrons at the interfaces of an In 0.52 Al 0.48 As/In 0.53 Ga 0.47 As/In 0.52 Al 0.48 As double‐heterojunction structure is able to generate current oscillations at frequencies in the THz range. The possibility of taking advantage of this mechanism to generate THz signals has been demonstrated in structures with well dimension close to the electron ballistic transport length in In 0.53 Ga 0.47 As.A schematic illustration of quasi‐ballistic electrons undergoing multiple reflections from the heterojunction interface. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)