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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

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Strip-shaped samples in a microwave Corbino spectrometer.

Marc Scheffler¹, Serife Kilic, Martin Dressel

¹1 Physikalisches Institut, Universität Stuttgart, 70550, Stuttgart, Germany. scheffl@pi1.physik.uni-stuttgart.de

The Review of Scientific Instruments

|September 4, 2007

Summary

Researchers adapted the Corbino geometry for microwave spectroscopy, enabling the study of strip-shaped samples. This innovation enhances sensitivity for conductive materials and allows analysis of anisotropic properties.

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Area of Science:

Materials Science
Spectroscopy
Electrical Engineering

Background:

The Corbino geometry is a standard method for broadband microwave spectroscopy.
Traditionally, this technique requires samples to fully cover the Corbino probe.

Purpose of the Study:

To investigate the feasibility of using strip-shaped samples with Corbino geometry.
To enhance sensitivity for highly conductive samples.
To enable the study of anisotropic materials using this setup.

Main Methods:

Adaptation of the established Corbino geometry probe layout.
Utilizing strip-shaped samples instead of full-coverage samples.
Broadband microwave spectroscopy measurements.

Main Results:

Demonstrated successful application of Corbino geometry with strip-shaped samples.
Observed increased sensitivity for highly conductive samples.
Established a new method for studying anisotropic material properties.

Conclusions:

The Corbino geometry can be effectively used with strip-shaped samples.
This modified approach offers improved sensitivity and new possibilities for material analysis, particularly for anisotropic conductors.