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Subsurface near-field scanning tomography.

K P Gaikovich¹

¹Institute for Physics of Microstructures of RAS, GSP-105, Nizhniy Novgorod, Russia, 603950.

Physical Review Letters

|May 16, 2007

Summary

A new scanning tomography method enables electromagnetic sounding of 3D dielectric structures. This versatile technique offers deep analysis for applications from nanophysics to geophysics, achieving subwavelength resolution in medical imaging.

Area of Science:

Electromagnetism
Geophysics
Medical Imaging
Nanophysics

Background:

Electromagnetic sounding is crucial for analyzing subsurface and material structures.
Existing methods have limitations in resolution and depth for complex 3D inhomogeneous dielectric half-spaces.
Advanced imaging techniques are needed for diverse applications ranging from nanoscale to geological scales.

Purpose of the Study:

To develop a scanning tomography method for electromagnetic sounding of 3D inhomogeneous dielectric half-spaces.
To demonstrate the suitability of known physical diagnostics for this tomography across various frequency ranges.
To highlight the broad applicability of this approach in diverse scientific and industrial fields.

Main Methods:

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Development of a scanning tomography technique for electromagnetic analysis.
Adaptation of physical diagnostics methods for tomographic imaging.
Application of the method to microwave scanning tomography of living tissues.

Main Results:

The developed scanning tomography method is effective for 3D inhomogeneous dielectric structures.
The technique supports analysis depths from nanometers (optical frequencies) to kilometers (ultralow frequencies).
Subwavelength resolution was achieved in microwave scanning tomography of living tissues.

Conclusions:

The scanning tomography method provides a versatile tool for electromagnetic sounding across multiple scales.
This approach has significant potential in nanophysics, biological and medical diagnostics, geophysics, and geology.
The demonstrated subwavelength resolution in biological tissues underscores its practical utility.