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Self-referenced ultra-broadband transient terahertz spectroscopy using air-photonics
Optics Express
|May 4, 2016
Summary
Terahertz (THz) air-photonics enables ultra-broadband THz pulse generation and detection. This study provides guidelines for transient THz spectroscopy using air-photonics, including novel methods for phase error reduction and data analysis.
Area of Science:
- Physics
- Optics
- Spectroscopy
Background:
- Terahertz (THz) air-photonics utilizes nonlinear interactions of ultrashort laser pulses in air.
- Air's non-dispersive nature automatically satisfies optical-THz phase matching.
- This enables the generation and detection of ultra-broadband THz pulses across the entire spectrum.
Purpose of the Study:
- To present explicit guidelines for ultra-broadband transient THz spectroscopy utilizing air-photonics.
- To introduce a novel self-referenced signal acquisition method to minimize phase error.
- To detail a numerically accurate approach for transient reflectance data analysis.
Main Methods:
- Implementation of air-photonics for THz pulse generation and detection.
- Development of a self-referenced signal acquisition technique.
- Application of a numerically accurate data analysis method for transient reflectance.
Main Results:
- Established guidelines for ultra-broadband transient THz spectroscopy with air-photonics.
- Demonstrated a novel method for minimizing phase errors in signal acquisition.
- Validated a numerically accurate approach for analyzing transient reflectance data.
Conclusions:
- Air-photonics provides unique opportunities for ultra-broadband transient THz spectroscopy.
- The presented guidelines and methods address critical challenges in the technique.
- This work facilitates advanced applications of THz spectroscopy.
