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Published on: November 30, 2012
Silver halide single-mode strip waveguides for the mid-infrared.
1Raymond and Beverly Sackler Faculty of Exact Science, School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel. tomerlew@post.tau.ac.il
Optics Letters
|June 30, 2012
Summary
Researchers developed single-mode silver halide (AgCl(x)Br(1-x)) strip waveguides for mid-infrared (MIR) applications. These waveguides are essential for creating MIR integrated optical circuits for chemical sensing and stellar interferometry.
Area of Science:
- Materials Science
- Optoelectronics
- Photonics
Background:
- Mid-infrared (MIR) integrated optical circuits are crucial for advanced sensing and astronomical applications.
- Developing efficient waveguide structures for the MIR spectrum remains a significant challenge.
Purpose of the Study:
- To demonstrate single-mode strip waveguides using silver chloride bromide (AgCl(x)Br(1-x)) for MIR applications.
- To lay the groundwork for fabricating complex MIR integrated optical circuits.
Main Methods:
- AgCl(x)Br(1-x) thin films were deposited onto a silicon-silicon dioxide (Si-SiO2) substrate.
- Photolithography and lift-off techniques were employed to pattern the strip waveguides.
- Propagation losses were measured at a wavelength of 10.6 μm using the cut-back method.
Main Results:
- Successfully fabricated single-mode AgCl(x)Br(1-x) strip waveguides.
- Measured propagation losses of 20 dB/cm at 10.6 μm.
- Demonstrated the feasibility of using AgCl(x)Br(1-x) for MIR integrated optics.
Conclusions:
- The developed AgCl(x)Br(1-x) waveguides represent a key advancement for MIR integrated optical circuits.
- These waveguides are suitable for applications including chemical sensing and stellar interferometry.
- Further development can lead to more sophisticated MIR photonic devices.
