Gain and Loss in Active Waveguides Based on Lithographically Defined Quantum Dots

Author

Silverman, Kevin L. ; Miaja-Avila, Luis ; Verma, V.B. ; Coleman, J.J. ; Mirin, Richard P.

Author_Institution

Nat. Inst. of Stand. & Technol., Boulder, CO, USA

Volume

26

Issue

13

fYear

2014

fDate

1-Jul-14

Firstpage

1283

Lastpage

1286

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.

Keywords

ground states; laser beams; laser variables measurement; optical loss measurement; quantum dot lasers; self-assembly; waveguide lasers; active waveguides; as-cleaved facets; ground state emission; ground state lasing; injection current; lasing action; lithographically defined quantum dots; maximum modal gain; nominally identical structure; optical gain; optical loss; peak gain; resonant pulse transmission; self-assembled quantum dots; two-layer structure; Current measurement; Gallium arsenide; Optical waveguides; Quantum dot lasers; Quantum dots; Stationary state; Temperature measurement; Nanolithography; quantum dots; semiconductor lasers; semiconductor optical amplifiers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2321140

Filename

6828000