0598699 - ÚPT 2025 RIV US eng J - Journal Article
Maňka, Tadeáš - Šiler, Martin - Liška, Vojtěch - Zemánek, Pavel - Šerý, Mojmír - Brzobohatý, Oto
Simulation of optomechanical interaction of levitated nanoparticle with photonic crystal micro cavity.
Optics Express. Roč. 32, č. 5 (2024), s. 7185-7196. ISSN 1094-4087
R&D Projects: GA MŠMT EH22_008/0004649; GA ČR(CZ) GF21-19245K; GA TA ČR(CZ) TN02000020
Grant - others:AV ČR(CZ) AP2002
Program: Akademická prémie - Praemium Academiae
Institutional support: RVO:68081731
Keywords : Optical trapping * photonic crystal cavity * resonator * finite difference time domain
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.2, year: 2023 ; AIS: 0.723, rok: 2023
Method of publishing: Open access
Result website:
https://opg.optica.org/oe/fulltext.cfm?uri=oe-32-5-7185&id=546570DOI: https://doi.org/10.1364/OE.515202

We propose and analyze theoretically a promising design of an optical trap for vacuum levitation of nanoparticles based on a one-dimensional (1D) silicon photonic crystal cavity (PhC). The considered cavity has a quadratically modulated width of the silicon wave guiding structure, leading to a calculated cavity quality factor of 8 x 105. An effective mode volume of approximately 0.16 mu m3 having the optical field strongly confined outside the silicon structure enables optical confinement on nanoparticle in all three dimensions. The optical forces and particlecavity optomechanical coupling are comprehensively analyzed for two sizes of silica nanoparticles (100 nm and 150 nm in diameter) and various mode detunings. The value of trapping stiffnesses in the microcavity is predicted to be 5 order of magnitudes higher than that reached for optimized optical tweezers, moreover the linear single photon coupling rate can reach MHz level which is 6 order magnitude larger than previously reported values for common bulk cavities. The theoretical results support optimistic prospects towards a compact chip for optical levitation in vacuum and cooling of translational mechanical degrees of motion for the silica nanoparticle of a diameter of 100 nm.
Permanent Link: https://hdl.handle.net/11104/0356320