Berlin 2024 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 44: Twisted Materials / Systems

TT 44.5: Talk

Wednesday, March 20, 2024, 12:30–12:45, H 3007

Double resonance of twisted photon states and related transfer of orbital angular momentum to chiral model systems — Silvia Müllner¹, •Peter Lemmens¹, and Angela Möller² — ¹IPKM, TU-BS, Braunschweig, Germany — ²Dept. Chemistry, JGU Mainz, Germany

Twisted photon states that contain spin (helicity) and orbital angular momentum (chirality) are used to probe topological properties of chiral model systems. As the latter we recently identified chiral liquid crystals [1]. Their optical properties are dominated by a twistedness with a pitch length tailored both by temperature and composition. Using these two parameters as well as curved interfaces introduced by dispersed nanoparticles we establish resonances of pitch length with the geometry as well as with the OAM transfer.

Work supported by DFG GrK 1952/2, Metrology for Complex Nanosystems, NanoMet and DFG EXC-2123 QuantumFrontiers - Light and Matter 390837967.

[1] S. Müllner, et al., Phys. Rev. Lett. 129 (2022) 207801.

Keywords: twisted light; orbital angular momentum; chirality; curved interfaces; geometric resonance