Asymmetric Coupled Quantum Wells for High Speed Optical Modulators at Communication Wavelengths

Abstract

A novel design for electro-optic modulators operating at wavelengths compatible with fiber-based optical interconnects and networks is presented. This design uses InGaAs/InAlAs asymmetric coupled quantum wells (ACQWS) to enhance the electro-optic effect within the material and results in a low power modulator capable of high-speed operation. A device was fabricated which shows real charge transfer between the ACQWs. This device shows that without modulation doping and real charge transfer the quantum confined stark effect in InGaAs/InAlAs is insufficient to provide strong modulation at low drive voltages. Standard pump-probe techniques were also used to study the dynamics Of charge transfer between the wells. Picosecond recovery times were exhibited by these devices and were found to be independent of the barrier width. Electro- optic modulators, InGaAs/InAlAs Asymmetric Coupled Quantum Wells(ACQWs).

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1994
Accession Number
ADA281572

Entities

People

  • B. P. Mcginnis
  • Mark F. Krol
  • Michael J. Hayduk
  • N. Peyghamberian
  • Sergey Ten

Organizations

  • University of Arizona

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Charge Transfer
  • Electro-Optic Modulators
  • Electron Transfer
  • Energy Bands
  • Engineers
  • Long Wavelengths
  • Materials
  • Modulation
  • Modulators
  • Photonics
  • Picosecond Time
  • Quantum Wells
  • Scattering
  • Semiconductors
  • Steady State

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Quantum Computing