Millimeter Wave Modulators Using Quantum Dots

Abstract

In this effort electro-optic modulators for millimeter wave sensing and imaging were developed and demonstrated via design, fabrication, and experimental characterization of multi layer quantum dot structures for enhanced electro-optic interaction. Millimeter waves carry small amounts of energy inspiring us to maximize the electro-optic (EO) effect in the developed sensor material. Traditional bulk materials do not have high enough EO coefficients for this application so the goal is to custom design novel materials with optimized EO properties. InAs quantum dot samples were grown via MBE and characterized via AFM, XRD, and photoluminescence. In addition quantum dot samples were also grown in a waveguide structure, which was further incorporated in an external Mach-Zehnder Interferometer setup to characterize the electro-optic effect of the quantum dots. A reference waveguide in which bulk GaAs replaces the quantum dot materials was prepared to demonstrate the quantum dot enhancement unambiguously.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2008
Accession Number
ADA494764

Entities

People

  • Dennis W. Prather

Organizations

  • University of Delaware

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aspect Ratio
  • Coefficients
  • Crystal Lattice Vibrations
  • Density Functional Theory
  • Electric Fields
  • Electro-Optic Modulators
  • Electrons
  • Geometry
  • Mach Zehnder Interferometers
  • Materials
  • Millimeter Waves
  • Modulation
  • Modulators
  • Optical Modulators
  • Optical Properties
  • Quantum Dots
  • Waveguides

Fields of Study

  • Materials science
  • Physics

Readers

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

Technology Areas

  • 5G
  • Quantum Computing