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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Design of a continuous-wave tunable terahertz source using waveguide-phase-matched GaAs.

Alireza Marandi¹, Thomas E Darcie, Poman P M So

¹Department of Electrical and Computer Engineering, University of VictoriaVictoria, BC, V8P 5C2, Canada. marandi@ece.uvic.ca

|July 9, 2008

Summary

A new method generates tunable terahertz radiation using difference frequency generation in GaAs. This approach integrates optical and terahertz waveguides for efficient continuous-wave output.

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Published on: August 30, 2012

Area of Science:

Optics and Photonics
Solid-State Physics
Terahertz Science and Technology

Background:

Terahertz (THz) radiation offers unique properties for various applications, but efficient and tunable sources remain a challenge.
Difference Frequency Generation (DFG) is a nonlinear optical process capable of generating THz radiation.
Gallium Arsenide (GaAs) possesses favorable nonlinear optical properties for THz generation.

Purpose of the Study:

To propose and theoretically investigate a novel continuous-wave (CW) THz radiation source.
To achieve tunable THz output using DFG in a GaAs crystal.
To address phase-matching requirements for efficient THz generation.

Main Methods:

Utilizing difference frequency generation (DFG) in a GaAs crystal.
Integrating optical and terahertz waveguides to manage phase matching.
Leveraging the dispersive properties of GaAs for phase matching.
Tuning incident laser wavelengths to control output THz frequency.

Main Results:

Demonstrated a novel DFG-based source for continuous-wave THz radiation.
Achieved frequency tunability of the THz output from 0 to 3.5 THz.
Successfully employed waveguide integration for phase matching in GaAs.

Conclusions:

The proposed DFG source in GaAs offers a viable route to tunable CW THz radiation.
Waveguide integration is crucial for achieving efficient phase matching in this system.
This technology has potential for applications requiring specific THz frequencies.