Probing interface layer qualities of GaAs/AlGaAs modulation-doped heterostructures using magnetic field-enhanced THz emission spectroscopy

Authors

Elmer S. Estacio ⋅ JP Institute of Laser Engineering, Osaka University
Carlito Ponseca Jr. ⋅ JP Institute of Laser Engineering, Osaka University
Nobuhiko Sarukura ⋅ JP Institute of Laser Engineering, Osaka University
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Michelle Bailon-Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

The magnetic field-enhanced terahertz (THz) emission from GaAs/AlGaAs modulation-doped heterostructures (MDH's) is studied in the context of assessing the quality of the GaAs/AlGaAs interface in relation to junction electric field and mobility. Three MDH samples with varying AlGaAs spacer thickness were investigated. The most intense THz radiation was observed for the MDH sample having the thinnest spacer layer. The effect of changing the polarity of a magnetic field applied parallel to the sample surface plane on THz radiation power is then presented. Results show that flipping the direction of the transverse 1-T magnetic field modifies the extent of field-induced THz radiation enhancement and is also dependent on the spacer layer thickness. The thin spacer layer sample appears to be least affected by the applied field polarity.

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Issue

2007: Proceedings of the 25th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2007-1D-01

Section

Condensed Matter Physics

Published

2007-10-24

How to Cite

[1]

ES Estacio, C Ponseca, N Sarukura, A Somintac, M Bailon-Somintac, and A Salvador, Probing interface layer qualities of GaAs/AlGaAs modulation-doped heterostructures using magnetic field-enhanced THz emission spectroscopy, Proceedings of the Samahang Pisika ng Pilipinas 25, SPP-2007-1D-01 (2007). URL: https://proceedings.spp-online.org/article/view/SPP-2007-1D-01.