HACT Spatial Light Modulator
Abstract
High contrast ratio exceeding 1200:1 has been obtained in Fabry-Perot structures consisting of InGaAs-GaAs multiple quantum well layers and AlAs/GaAs 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 6000:1, 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 AlGaAs/GaAs 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1992
- Accession Number
- ADA256994
Entities
People
- F. Jain
- Thomas W. Grudkowski
Organizations
- United Technologies Corporation