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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

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Published on: November 21, 2019

Detectivity enhancement in THz electrooptical sampling.

Saima Ahmed¹, Janne Savolainen¹, Peter Hamm¹

¹Department of Chemistry, University of Zurich, Zurich, Switzerland.

The Review of Scientific Instruments

|February 13, 2014

Summary

This summary is machine-generated.

This study introduces a simple method using Brewster windows to boost terahertz electro-optical sampling detectivity. This technique significantly enhances the measurement of weak terahertz fields, especially with amplified laser systems.

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Area of Science:

Optics and Photonics
Terahertz (THz) Science and Technology

Background:

Terahertz electro-optical sampling is crucial for detecting weak THz fields.
Low-repetition rate amplified laser systems present challenges for sensitive THz measurements.

Purpose of the Study:

To develop a simple yet effective scheme for enhancing the detectivity of THz electro-optical sampling.
To improve the measurement capabilities for weak terahertz signals.

Main Methods:

Introduced a sequence of Brewster windows to increase the probe beam's ellipticity.
Varied window material and number of Brewster windows to adjust enhancement factor.
Demonstrated the scheme using ZnSe Brewster windows with a Ti:S laser system.

Main Results:

Achieved a significant enhancement in detectivity for THz electro-optical sampling.
Demonstrated an enhancement factor of approximately 20 using four ZnSe Brewster windows.
Showcased the scheme's effectiveness for measuring very small THz fields.

Conclusions:

The proposed Brewster window scheme offers a practical method to enhance THz electro-optical sampling detectivity.
This technique is particularly beneficial for applications involving low-repetition rate amplified laser systems and weak THz fields.