SAMOP 2021 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 16: Quantum Optics
Q 16.2: Poster
Donnerstag, 23. September 2021, 16:30–18:30, P
Integrated free-space cavity optomechanics with AlGaAs heterostructures — •Anastasiia Ciers1, Sushanth Kini Manjeshwar1, Jamie M. Fitzgerald2, Shu Min Wang1, Philippe Tassin2, and Witlef Wieczorek1 — 1Department of Microtechnology and Nanoscience, Chalmers University of Technology, 41258 Gothenburg, Sweden — 2Department of Physics, Chalmers University of Technology, 41258 Gothenburg, Sweden
Cavity optomechanics exploit the coupling of mechanical resonators to light fields with applications in quantum-enhanced sensing, quantum networks, or for foundational studies. Multielement systems, whereby multiple mechanical resonators couple to the common light field, may allow reaching the single-photon strong coupling regime and open a path to explore collective effects such as synchronization or entanglement generation between mechanical resonators. Realization of these experiments is challenging due to the prerequisite of extremely precise positioning of highly reflective mechanical resonators within the cavity. In our work we address this challenge and fabricate and characterize suspended single- and bi-layer photonic crystal membranes in AlGaAs heterostructures, which simultaneously integrate a highly reflective distributed Bragg reflector. Our approach allows to create integrated, closely spaced membrane systems embedded in an optical microcavity. With proper design such systems can exhibit photonic bound states in the continuum, which can further increase the light-matter interaction. Our work paves the way for a versatile optomechanics platform realizing multielement mechanical resonators in high-Finesse microcavities.