Electro-absorption and electro-refraction in an InAs quantum dot waveguide modulator

David Malins, Alvaro Gomez-Iglesias, Edik U. Rafailov, W Sibbett, Alan Miller

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Optical transmission measurements are reported in the 1.3-mu m region in an InAs quantum-dot (QD) waveguide modulator using a supercontinuum generator. A quantum-confined Stark shift of 15 nm was demonstrated in a five-layer QD stack with a field of 270 KV/cm. The electrically induced change in absorption has been measured and the change in refractive index (up to 0.001) has been estimated via the Kramers-Kronig relations. This highlights the potential of such a device as an electro-absorption or electrooptic phase modulator at telecommunication wavelengths.

Original languageEnglish
Pages (from-to)1118-1120
Number of pages3
JournalIEEE Photonics Technology Letters
Volume19
Issue number15
DOIs
Publication statusPublished - Jul 2007

Keywords

  • electroabsorption
  • electrorefraction
  • semiconductor quantum dots (QDs)
  • supercontinuum
  • PHASE MODULATION
  • WELL STRUCTURES

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