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HL: Fachverband Halbleiterphysik

HL 22: Focus Session: Young Semiconductor Forum

HL 22.19: Poster

Dienstag, 19. März 2024, 11:00–15:30, Poster F

Ultrahigh frequency Brillouin spectroscopy in optophononic Fabry-Perot cavities and optomechanical study of 2D materials in fiber Fabry-Perot cavities — •Anne Rodriguez — Chair for Nano and Quantum Sensors, Technische Universität München, Garching, Germany

The fine control achieved over acoustic phonon dynamics enabled the engineering of interactions with other excitations [1,2]. During my PhD thesis (C2N, CNRS, Université Paris-Saclay) my research was mainly focused on the study of acoustic phonons in GaAs/AlAs multilayered cavities where both light in the near-infrared range and acoustic phonons in the 20 GHz range can be simultaneously confined. I developed experimental approaches for Brillouin spectroscopy that can integrate a widely tunable excitation-source to probe ultra-high acoustic phonons [3,4]. My work also involved theoretical research on topological 1D phononic resonators [5]. In October 2023, I joined the Nano and Quantum Sensor group (TUM) where I am working on optomechanics with transition metal dichalcogenides membranes. I aim to study the mechanical properties and the strain coupling with a quantum emitter embedded in the membrane [6] in a fiber Fabry-Perot cavity. This would be a step forward in the study of spin-optomechanics [7].

[1]M. Yuan et al., AVS Quantum Sci. 4, 035901 (2022). [2]Y. Chu et al., Science 358, 199 (2017). [3]A. Rodriguez et al., Opt. Exp. 29, 2637 (2021). [4]A. Rodriguez et al., ACS Phot. 10, 1687 (2023). [5]A. Rodriguez et al., PRB 108, 205301 (2023). [6]K. Barthelmi et al., APL 117, 070501 (2020). [7]L. He et al., Sci. Adv. 2, e1600485 (2016).

Keywords: Brillouin scattering; Fabry-Perot cavity; 2D materials; optomechanics