Gain and Loss in active waveguides based on lithographically defined quantum dots

Published

June 1, 2014

Author(s)

Kevin L. Silverman, Luis Miaja Avila, Varun B. Verma, Richard P. Mirin, James J. Coleman

Abstract

We report on the optical gain and loss of waveguides containing lithographically defined quantum dots. Lasing action has previously been demonstrated in a nominally identical structure. Measurements are made by monitoring the transmission of a resonant pulse while varying the injection current. We measure a maximum modal gain of 1.8 cm^-1 at the peak of the ground state emission for a two-layer structure. The peak gain is insufficient for ground state lasing to be achieved in a structure with as-cleaved facets, but the gain per dot is comparable with that demonstrated in self- assembled quantum dots.

Citation

IEEE Photonics Technology Letters

Volume

26

Issue

13

Pub Type

Journals

Download Paper

https://doi.org/10.1109/LPT.2014.2321140

Keywords

quantum dots, semiconductor optical amplifiers, electron beam lithography, nanostructures

Citation

Silverman, K. , Miaja, L. , Verma, V. , Mirin, R. and Coleman, J. (2014), Gain and Loss in active waveguides based on lithographically defined quantum dots, IEEE Photonics Technology Letters, [online], https://doi.org/10.1109/LPT.2014.2321140 (Accessed October 8, 2025)