SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 10: Focus Session: Progress in Hybrid Phononic Quantum Technologies II
HL 10.10: Talk
Monday, March 27, 2023, 18:15–18:30, POT 151
Brillouin scattering selection rules in polarization-sensitive photonic resonators — Anne Rodriguez1, Priya Priya1, Edson Cardozo1, Abdelmounaim Harouri1, Isabelle Sagnes1, Florian Pastier2, Martina Morassi1, Aristide Lemaître1, Loic Lanco1, •Martin Esmann1,3, and Daniel Lanzillotti-Kimura1 — 1Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, Palaiseau, France — 2Quandela SAS, Palaiseau, France — 3Institut für Physik, Universität Oldenburg, Germany
Spontaneous Brillouin scattering in bulk crystalline solids is governed by intrinsic selection rules which lock the relative polarization of excitation laser and Brillouin signal. In this work, we independently manipulate the polarization states of the two, using polarization-sensitive optical resonances in elliptical micropillars [1,2].
The induced wavelength-dependent polarization rotation [3] enables a polarization-based filtering technique [4]. We employ it to experimentally detect acoustic phonon resonances with frequencies in the range of 20-100 GHz, difficult to access with both standard Brillouin and Raman spectroscopy techniques. The strong modification of selection rules extends to any optical system with polarization-sensitive modes: plasmonic resonators, photonic crystals, birefringent micro- and nanostructures. It is thus relevant for applications in optomechanical, optoelectronic, and quantum optics devices [1,2].
[1] H. Wang et al. Nat. Phot. 13, 770 (2019). [2] S. Gerhard et al. PRB 100, 115305 (2019). [3] B. Gayral et al. APL 72, 1421 (1998). [4] A. Rodriguez et al. arXiv:2209.12659 (2022).