SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 67: Optomechanics III
Q 67.7: Talk
Friday, March 10, 2023, 12:30–12:45, F442
Numerical analysis of a novel optical trap design based on optomechanical backactions — •Jose Manuel Monterrosas Romero1,2, Ester Koistinen1, Seyed Khalil Alavi1,2, and Sungkun Hong1,2 — 1Institute for Functional Matter and Quantum Technologies, Universität Stuttgart, 70569 Stuttgart, Germany — 2Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, 70569 Stuttgart, Germany
Optical traps have proven to be an invaluable tool for many scientific applications. However, due to the nature of the traps, their spatial shapes are diffraction limited, and a trapped object often suffers from severe absorption heating, especially in a high vacuum. To mitigate these issues, we propose a new type of optical trap based on the use of dynamic optomechanical backactions between optical nanocavities and a dielectric particle. Our trap consists of two photonic crystal nanobeam cavities (PCNC) closely placed in parallel. Numerical simulations confirm that an extremely sharp potential can be created in the middle between the two PCNCs, which can trap a dielectric nanoparticle stably at room temperature. Furthermore, we find that the dynamic optomechanical forces allow for trapping the particle with significantly suppressed optical heating, therefore reducing heat-induced trap instability. We also present the possibility of creating more complex trapping potentials by adding a second beam with different frequencies for each cavity. All of these unique properties make our system a promising trapping platform for levitated optomechanics.