The dynamical Franz-Keldysh effect in the deep ultraviolet probed by transient absorption and dispersion of diamond using a miniature beamline

2022/11/11 by Jan Reislöhner, Reislöhner, Jan, Doyeong Kim +5
Materials Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Laser-Matter Interactions and Applications #Optics (physics.optics)

paper · pdf · doi:10.48550/arxiv.2211.06364

openalex publication_date 2022/11/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The deep ultraviolet, the bandgap region of dielectrics, is not readily accessible for established methods of ultrafast spectroscopy. Here, a miniature beamline, where a tailored deep ultraviolet field is used immediately after the noncollinear generation without subsequent optical elements, is introduced for transient absorption and dispersion spectroscopy. The near-bandgap region of diamond in the presence of a few-femtosecond pump pulse is explored where the delayed dynamical Franz-Keldysh effect and the almost instantaneous optical Kerr effect coexist.

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