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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

Resonant waveguide device with vertical gratings.

Hyo-Chang Kim¹, Kazuhiro Ikeda, Yeshaiahu Fainman

¹Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0407, USA. hckim@emerald.ucsd.edu

|March 30, 2007

Summary

Silicon on insulator wafers were used to create novel transmission resonant filters. These filters exhibit a narrow transmission band, making them ideal for applications in lasers, switches, and tunable filters.

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Area of Science:

Photonics and optical engineering
Materials science

Background:

Waveguide-based optical filters are crucial components in integrated photonics.
Achieving narrow transmission bands with high quality factors is essential for advanced optical devices.

Purpose of the Study:

To design and fabricate transmission resonant filters utilizing vertical gratings on silicon on insulator (SOI) wafers.
To experimentally characterize the optical performance of these filters, focusing on transmission bands and stopbands.

Main Methods:

Fabrication of waveguide devices with vertical gratings on SOI wafers.
Experimental measurement of transmission spectra to determine filter characteristics.

Main Results:

Successful realization of transmission resonant filters in SOI.
Observation of a broad stopband (~19 nm) and a narrow transmission band (~0.5 nm).
Achieved a high quality factor (Q) of approximately 3000 for the transmission band.

Conclusions:

The fabricated filters demonstrate high-performance resonant cavity characteristics.
These devices are suitable for various photonic applications, including laser cavities, switches, modulators, detectors, and tunable filters.