Electroluminescence of InAs quantum dots-in-a well (DWELL) p-i-n structure

Authors

Jennette Mateo ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman
Marie Josephine De Luna ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnita Podpod ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Electroluminescence (EL) spectroscopy was performed on InAs dots-in-a-well (DWELL) samples at low current densities. Regularly-spaced peaks were observed in the EL spectra. The peak spacing (~20 meV) corresponds to the longitudinal optic (LO) phonon energy of InAs at high symmetry points X and L. It is then suggested that the features are due to LO phonon-assisted transitions (LO phonon modes). Moreover, the EL spectra of the samples with roughened edges shows a dominant emission at 1.18 eV attributed to transition in the InGaAs QW and a broad, featureless emission peak at 1.18 eV attributed to transition in the QDs. This indicates that the cleaved edges, which make the cavity, were able to support the modes. This shows that even at low current densities (~33 A/cm²) the InAs QDs have gain.

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Issue

2004: Proceedings of the 22nd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2004-PB-14

Section

Poster Session PB

Published

2004-10-25

How to Cite

[1]

J Mateo, E Estacio, MJ De Luna, A Podpod, A Somintac, and A Salvador, Electroluminescence of InAs quantum dots-in-a well (DWELL) p-i-n structure, Proceedings of the Samahang Pisika ng Pilipinas 22, SPP-2004-PB-14 (2004). URL: https://proceedings.spp-online.org/article/view/SPP-2004-PB-14.