Related Experiment Video
Updated: Jun 20, 2026
05:57
Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
Published on: April 1, 2020
AlGaAs/GaAs optically controlled wave-plate modulator
Optics Letters
|September 29, 2009
Summary
We developed an optically controlled electro-optic modulator using AlGaAs/GaAs quantum wells. This device functions as a high-contrast optical switch with a fast switching speed, demonstrating potential for integrated optics applications.
Area of Science:
- Optoelectronics
- Materials Science
- Integrated Optics
Background:
- Semiconductor quantum wells offer unique optoelectronic properties.
- Integrated optics requires efficient and fast optical modulation.
- AlGaAs/GaAs heterostructures are suitable for optoelectronic devices.
Purpose of the Study:
- To demonstrate an optically controlled electro-optic wave-plate modulator.
- To evaluate its performance as an optical switch and wave plate.
- To characterize its electro-optic coefficients and photo-generated current sensitivity.
Main Methods:
- Fabrication of an AlGaAs/GaAs multiple-quantum-well device.
- Integration of optical waveguides for signal and control beams.
- Measurement of optical switching contrast ratios and throughput.
- Characterization of electro-optic coefficients and current sensitivity.
Main Results:
- Achieved output amplitude contrast ratios greater than 300:1 for optical switching.
- Obtained signal beam throughputs of 34%.
- Extrapolated a switching speed of 1.5 ns.
- Measured linear and quadratic electro-optic coefficients and photo-generated current sensitivity.
Conclusions:
- The AlGaAs/GaAs quantum well modulator shows promise for integrated optics.
- High contrast ratios and fast switching speeds are achievable.
- The device can function as both an optical switch and an optically controlled wave plate.
