Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 49: Poster – Photonics, Lasers, and Applications
Q 49.20: Poster
Wednesday, March 12, 2025, 17:00–19:00, Tent
Observation of the Spin Hall Effect of Light in Confocal Microscopy — •Anton Lögl1, Wenze Lan1, Meryem Benelajla2, Clemens Schäfermeier2, Khaled Karrai2, and Bernhard Urbaszek1 — 1Institute for Condensed Matter Physics, Technische Universität Darmstadt, 64289 Darmstadt, Germany — 2attocube systems AG, Eglfinger Weg 2, 85540 Haar, Germany
In the quantum picture of light the two spin states of photons correspond to right- and left-handed cicrular polarizations σ+ and σ−. Depending on the chirality of its circular polarization, the trajectory of a circularly polarized beam will shift above or below the plane of incidence when reflected off a surface. This Imbert-Fedorov shift is due to spin-orbit coupling of light upon each reflection and is typically several orders of magnitude smaller than the photon wavelength. For this reason, it has up to now required complex detection schemes and hence limiting detailed experimental investigations and practical applications. Here, we present a novel method to directly observe the spin-orbit coupling of light in confocal microscopy.
Keywords: confocal microscopy; spin Hall effect of light; beam shift; spin orbit coupling; cross polarization