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Updated: Jun 20, 2026

Patterning via Optical Saturable Transitions - Fabrication and Characterization

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Published on: December 11, 2014

Optical heterodyne sensor using the Goos-Hänchen shift.

T Hashimoto, T Yoshino

|September 16, 2009

Summary

A novel sensing technique utilizes the Goos-Hänchen shift for precise measurements. This method achieves high resolution and stability for applications like displacement sensing.

Area of Science:

Optics and Photonics
Metrology and Measurement Science

Background:

The Goos-Hänchen (GH) shift, a transverse displacement of a reflected light beam, is sensitive to optical properties.
Existing methods for detecting the GH shift can lack sensitivity or stability for practical applications.

Purpose of the Study:

To propose and demonstrate a new sensing scheme based on the Goos-Hänchen shift in the polarization phase domain.
To enhance the phase retardation of the GH shift using multiple reflections.
To develop a stable and sensitive detection method for the enhanced phase shift.

Main Methods:

Utilizing multiple reflections in a plane-parallel transparent plate to enhance phase retardation.
Employing an in-line heterodyne detection method for sensitive and stable measurement of the phase shift.

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Developing a displacement sensor application based on light beam deflection by a lens.

Main Results:

The proposed sensing scheme effectively measures quantities using the Goos-Hänchen shift.
The in-line heterodyne method provides sensitive and stable detection of the enhanced phase shift.
The developed displacement sensor achieved a resolution of 60 nm over a 120 micrometer dynamic range.

Conclusions:

The novel sensing scheme offers a promising approach for high-resolution measurements.
The combination of multiple reflections and in-line heterodyne detection enhances GH shift sensitivity.
The displacement sensor application demonstrates the practical utility of this sensing technique.