Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 44: Laser Technology and Applications

Q 44.3: Vortrag

Donnerstag, 5. März 2026, 11:30–11:45, P 2

Ultrafast optical Kerr Gate at 1 GHz repetition rate with BBS glass and thin graphite films under focused illumination — •Amr Farrag¹, Assegid M. Flatae¹, Lenorah M. Stott², Alessandro Lagatti^3,5, Andrea Lapini^3,4, Doris Möncke², and Mario Agio^1,3,5 — ¹LaboratoryofNano-Optics, University of Siegen, 57072 Siegen, Germany — ²Inamori School of Engineering at the New York State College of Ceramics, Alfred University, Alfred, NY, 14802, USA — ³European Laboratory for Non-Linear Spectroscopy, 50019 Sesto Fiorentino, FI, Italy — ⁴Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, 43124 Parma, PR, Italy — ⁵Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), 50019 Sesto Fiorentino (FI), Italy

Ultrafast optical detection is vital for quantum technologies and nanophotonics, yet sub-picosecond processes remain challenging to resolve, especially at the single-emitter level. Optical Kerr gating (OKG) offers high detection efficiency and broadband operation, making it a strong candidate for ultrafast single-photon measurements.

We demonstrate a 1-GHz OKG scheme using bismuth-borosilicate (BBS) glass and thin graphite films, requiring <1 nJ gate-pulse energy under focused illumination. Temporal resolutions of 175 fs (BBS) and 141 fs (graphite films) are achieved. BBS glass provides a high nonlinear coefficient and sub-ps response, whereas graphene-based graphite films deliver exceptionally strong nonlinearity and are promising for integration in future on-chip ultrafast optical platforms.

Keywords: third-order nonlinear optical process; ultrafast phenomena; nonlinear optics; graphene-thin graphite films; BBS glass- 2D materials