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Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Polarimetric interferometer for nanoscale positioning applications.

S Xu¹, K Ouedraogo, L Chassagne

¹LISV, University of Versailles Saint-Quentin, PRES UniverSud, Versailles, France.

The Review of Scientific Instruments

|January 7, 2009

Summary

This study presents a subnanometric displacement control method using a Michelson interferometer and polarimeter. The system achieves 0.47 nm repeatability, enabling precise nanometrology applications.

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Area of Science:

Optics and Photonics
Metrology
Control Systems Engineering

Background:

Precise displacement control is crucial for advanced manufacturing and scientific research.
Existing methods often face limitations in achieving subnanometric resolution and repeatability.
Nanometrology demands highly accurate positioning systems for nanoscale characterization and manipulation.

Purpose of the Study:

To develop and demonstrate a novel displacement control method with subnanometric precision.
To investigate the influence of polarization state on positioning accuracy.
To establish the repeatability and potential applications of the developed system.

Main Methods:

Integration of a Michelson interferometer with a polarimeter for enhanced measurement capabilities.

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Utilization of a phase-locked loop (PLL) electronic board for real-time feedback and control.

Characterization of step-by-step displacements and repeatability over a 1 micrometer range.

Main Results:

Demonstration of step-by-step displacements with a 5 nm step value.
Achieved a repeatability of 0.47 nm over a 1 micrometer range.
Quantified positioning error to be less than 1 nm for residual ellipticity below 10 degrees.

Conclusions:

The proposed displacement control system achieves subnanometric precision and high repeatability.
The system's performance is sensitive to polarization state, requiring careful control.
The technology holds significant potential for millimeter-range displacements in controlled environments for nanometrology.