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Chirped ordered pulses for ultra-broadband ESR spectroscopy
Jean-Baptiste Verstraete1, William K Myers2, Mohammadali Foroozandeh1
1Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom.
The Journal of Chemical Physics
|March 9, 2021
Summary
A new chirped excitation sequence, CHirped ORdered pulses for Ultra-broadband Spectroscopy (CHORUS), enhances ultra-broadband Electron Spin Resonance (ESR) spectroscopy by improving excitation uniformity and stability.
Area of Science:
- Electron Spin Resonance (ESR) Spectroscopy
- Quantum Control and Pulse Shaping
Background:
- Conventional pulsed Electron Spin Resonance (ESR) spectroscopy faces limitations in excitation bandwidth.
- Swept-frequency pulses offer a potential solution to overcome bandwidth constraints.
Purpose of the Study:
- To introduce a novel chirped excitation sequence, CHirped ORdered pulses for Ultra-broadband Spectroscopy (CHORUS).
- To demonstrate CHORUS's capability for ultra-broadband ESR spectroscopy.
- To address excitation non-uniformity and instrumental instability issues in ESR.
Main Methods:
- Development and theoretical analysis of the CHORUS sequence.
- Experimental implementation and validation of the CHORUS sequence.
- Presentation of calibration strategies for practical application.
Main Results:
- The CHORUS sequence significantly improves excitation uniformity compared to existing methods.
- CHORUS exhibits enhanced robustness against instrumental instabilities.
- Theoretical and experimental results confirm the effectiveness of the proposed sequence.
Conclusions:
- CHORUS is a highly effective method for ultra-broadband ESR spectroscopy.
- The sequence offers advantages in excitation uniformity and stability.
- CHORUS shows promise for broader applications in various ESR experiments beyond single excitation.
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