Accession Number:

ADA256994

Title:

HACT Spatial Light Modulator

Descriptive Note:

Final rept. 1 Apr 1991-30 Apr 1992

Corporate Author:

UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT

Report Date:

1992-09-01

Pagination or Media Count:

89.0

Abstract:

High contrast ratio exceeding 12001 has been obtained in Fabry-Perot structures consisting of InGaAs-GaAs multiple quantum well layers and AlAsGaAs dielectric mirrors on GaAs substrates. The tuning voltage ranges between 5-25 volts, and the wavelength shifts between 4-10 nm. The on-loss is about 5 dB. The design of couples-cavity Fabry-Perot structures have been completed to obtain a contrast of over 60001, and the fabrication is in progress. These structures are designed to yield lower on-loss along with a wider transmission spectrum of 1nm. Heterojunction Acoustic Charge Transport HACT devices have been fabricated in various formats including freeze frame features. The HACT device is a type of CCD which uses a surface acoustic wave to propagate charge along an AlGaAsGaAs heterostructure. It provides a method of addressing the SLM array without using multiple interconnect circuits. The integration of HACT with MQW SLM is in progress.

Subject Categories:

  • Industrial Chemistry and Chemical Processing
  • Line, Surface and Bulk Acoustic Wave Devices
  • Electrooptical and Optoelectronic Devices
  • Acoustooptic and Optoacoustic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE