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HL: Fachverband Halbleiterphysik
HL 40: Thermal, acoustic and transport properties
HL 40.10: Vortrag
Mittwoch, 18. März 2020, 12:15–12:30, POT 151
Brillouin scattering in optophononic micropillar resonators at 300 GHz — •Martin Esmann1, Fabrice R. Lamberti1, Abdelmounaim Harouri1, Isabelle Sagnes1, Carmen Gomez-Carbonell1, Ivan Favero2, Olivier Krebs1, Loïc Lanco1, Aristide Lemaitre1, Pascale Senellart1, and Daniel Lanzillotti-Kimura1 — 1CNRS, Centre for Nanoscience and Nanotechnology (C2N), Palaiseau, France — 2Matériaux et Phénomènes Quantiques, CNRS, Université Paris Diderot, Paris, France
Inelastic scattering of light by acoustic phonons has potential for tailored optical frequency combs, narrow-line lasers [1], and all-optical data storage [2]. To be efficient, these applications require strong optical fields featuring a large overlap with the acoustic modes. So far, patterned waveguides and photonic crystal fibers allow tailoring the acoustic spectrum up to few tens of gigahertz.
Here, we introduce a monolithic Brillouin generator [3] based on a high-frequency nanoacoustic GaAlAs resonator operating at 300 GHz, which is embedded inside an optical micropillar cavity. This decouples the design of the Brillouin spectrum and the optical device. We develop a free-space filtering technique to detect the generated Brillouin signals. The micropillars could be readily integrated into fibered and on-chip architectures, and are compatible with epitaxial quantum dots, making them relevant for quantum communication.
[1] N. T. Otterstrom et al. Science 360, 1113 (2018).
[2] M. Merklein et al. Nature Commun. 8, 574 (2017).
[3] M. Esmann et al. Optica 6, 854 (2019).