Investigation of the interaction between the triangular-like quantum well of a HEMT-like structure and embedded quantum dots

Authors

Jasher John Ibañes ⋅ PH National Institute of Physics, University of the Philippines Diliman
Jonathan Azares ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elizabeth Ann Prieto ⋅ PH National Institute of Physics, University of the Philippines Diliman
Rafael Jaculbia ⋅ PH National Institute of Physics, University of the Philippines Diliman
Fritz Christian Awitan ⋅ PH National Institute of Physics, University of the Philippines Diliman
Ma. Herminia Balgos ⋅ PH National Institute of Physics, University of the Philippines Diliman
Michael Defensor ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We present the preliminary results of our investigation of an n-AlGaAs/GaAs HEMT-like heterostructure with InAs/GaAs quantum dots embedded near the channel. We carried out van der Pauw Hall Effect measurement and photocurrent spectroscopy of the HEMT-like heterostructure to determine the electrical and optical properties of the heterostructure. It was shown that when the distance of the InAs dots from the channel was 300 Å, the two-dimensional electron gas (2DEG) was strongly scattered as evidenced by 300 K van der Pauw Hall Effect measurement. The photocurrent response of the embedded dots was also found to peak at 1.15eV.

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Issue

2008: Proceedings of the 26th Samahang Pisika ng Pilipinas Physics Congress

Taking physics to the summit
22-24 October 2008, University of the Philippines Baguio, Baguio City

Article ID

SPP-2008-3A-02

Section

Materials Physics

Published

2008-10-22

How to Cite

[1]

JJ Ibañes, J Azares, EA Prieto, R Jaculbia, FC Awitan, MH Balgos, M Defensor, A Salvador, and A Somintac, Investigation of the interaction between the triangular-like quantum well of a HEMT-like structure and embedded quantum dots, Proceedings of the Samahang Pisika ng Pilipinas 26, SPP-2008-3A-02 (2008). URL: https://proceedings.spp-online.org/article/view/SPP-2008-3A-02.