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Dynamical Franz-Keldysh Effect in Diamond in the Deep Ultraviolet Probed by Transient Absorption and Dispersion
Jan Reislöhner1, Xiao Chen2, Doyeong Kim1
1Friedrich Schiller University Jena, Institute of Optics and Quantum Electronics, Abbe Center of Photonics, Max-Wien-Platz 1, 07743 Jena, Germany.
Physical Review Letters
|October 13, 2023
Summary
Researchers developed a compact spectroscopy beamline for studying diamond
Area of Science:
- Optics and Photonics
- Materials Science
- Spectroscopy
Background:
- Ultrafast spectroscopy probes dynamic processes in materials.
- Diamond exhibits unique optical properties relevant to advanced electronics and photonics.
Purpose of the Study:
- To introduce a novel miniature beamline for transient absorption and dispersion spectroscopy.
- To investigate the interplay of ultrafast optical effects in diamond's near-band-gap region.
Main Methods:
- Utilized a tailored deep ultraviolet field immediately after noncollinear generation.
- Employed a few-femtosecond pump pulse for excitation.
- Performed transient absorption and dispersion spectroscopy.
Main Results:
- Demonstrated a compact beamline design without subsequent optical elements.
- Observed the coexistence of the delayed dynamical Franz-Keldysh effect and the instantaneous optical Kerr effect in diamond.
- Characterized ultrafast optical dynamics in the near-band-gap region of diamond.
Conclusions:
- The miniature beamline enables efficient ultrafast optical characterization.
- The study provides insights into fundamental light-matter interactions in diamond under intense few-femtosecond excitation.
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