S
Sebastian A. Schulz
Researcher at University of St Andrews
Publications - 106
Citations - 2905
Sebastian A. Schulz is an academic researcher from University of St Andrews. The author has contributed to research in topics: Photonic crystal & Slow light. The author has an hindex of 19, co-authored 95 publications receiving 2349 citations. Previous affiliations of Sebastian A. Schulz include National and Kapodistrian University of Athens & Cork Institute of Technology.
Papers
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Journal ArticleDOI
Generating optical orbital angular momentum at visible wavelengths using a plasmonic metasurface
Ebrahim Karimi,Sebastian A. Schulz,Israel De Leon,Hammam Qassim,Jeremy Upham,Robert W. Boyd,Robert W. Boyd +6 more
TL;DR: Karimi et al. as mentioned in this paper showed that a plasmonic metasurface comprising an array of nano-antennas can couple spin-to-orbital angular momentum at thickness much smaller than the wavelength of the light with an efficiency of around 3%.
Journal ArticleDOI
Large optical nonlinearity of nanoantennas coupled to an epsilon-near-zero material
M. Zahirul Alam,Sebastian A. Schulz,Sebastian A. Schulz,Sebastian A. Schulz,Jeremy Upham,Israel De Leon,Robert W. Boyd,Robert W. Boyd +7 more
TL;DR: In this paper, a 50-nm-thick optical metasurface made of optical dipole antennas coupled to an epsilon-near-zero material exhibits a broadband (∼400nm bandwidth) and ultrafast (recovery time less than 1 ps) intensity-dependent refractive index n2 as large as −3.5 over a 200nm spectral range.
Journal ArticleDOI
Dispersion engineered slow light in photonic crystals: A comparison
Sebastian A. Schulz,Liam O'Faolain,Daryl M. Beggs,Thomas P. White,Andrea Melloni,Thomas F. Krauss +5 more
TL;DR: In this article, different types of dispersion engineered photonic crystal waveguides have been developed for slow light applications, and the group index bandwidth product (GBP) and the loss per delay in terms of dB ns −1 were compared.
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Femtosecond all-optical synchronization of an X-ray free-electron laser
Sebastian A. Schulz,Ivanka Grguras,Ivanka Grguras,C. Behrens,Hubertus Bromberger,John Costello,Marie Kristin Czwalinna,M. Felber,Matthias C. Hoffmann,Markus Ilchen,Haiyun Liu,Tommaso Mazza,Michael Meyer,Sven Pfeiffer,Pawel Predki,S. Schefer,Carla Schmidt,U. Wegner,Holger Schlarb,Adrian L. Cavalieri,Adrian L. Cavalieri +20 more
TL;DR: The analysis indicates that the performance of this optical synchronization is limited primarily by the free-electron laser pulse duration, and should naturally scale to the sub-10 femtosecond level with shorter X-ray pulses.
Journal ArticleDOI
Loss engineered slow light waveguides
Liam O'Faolain,Sebastian A. Schulz,Daryl M. Beggs,Thomas P. White,Marko Spasenović,Laurens Kuipers,Francesco Morichetti,Andrea Melloni,Simon Mazoyer,Jean-Paul Hugonin,Philippe Lalanne,Thomas F. Krauss +11 more
TL;DR: A theoretical model is developed that accurately describes the loss spectra of PhC waveguides and reveals that the entire hole contributes coherently to the scattering process, in contrast to previous models that added up the scattering from short sections incoherently.