Optimality of optical forces and torques on nanoparticles via illumination/scattering channels
Type
PreprintKAUST Grant Number
2950Date
2018-05-29Permanent link to this record
http://hdl.handle.net/10754/632001
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Show full item recordAbstract
A universal property of resonant subwavelength scatterers is that their optical cross-sections are proportional to a square wavelength, $\lambda^2$, regardless of whether they are plasmonic nanoparticles, two-level quantum systems, or RF antennas. The maximum cross-section is an intrinsic property of the incident field: plane waves, with infinite power, can be decomposed into multipolar orders with finite powers proportional to $\lambda^2$. In this Letter, we identify $\lambda^2/c$ and $\lambda^3/c$ as analogous force and torque constants, derived within a more general quadratic scattering-channel framework for upper bounds to optical force and torque for any illumination field. This framework also simplifies the reverse problem: computing optimalSponsors
We thank Chia-Wei Hsu and Ognjen Ilic for helpful discussions. Y.L. and O.D.M. were supported by the Air Force Office of Scientific Research under award number FA9550-17-1-0093. L.F. was supported by a Shanyuan Overseas scholarship from the Hong Kong Shanyuan foundation at Nanjing University. S.G.J was supported in part by the Army Research Office under contract number W911NF-13-D-0001. N.F. was supported by the Air Force Office of Scientific Research (AFOSR) Multidisciplinary Research Program of the University Research Initiative (MURI), and from KAUST-MIT agreement #2950.Publisher
arXivarXiv
1805.11471Additional Links
http://arxiv.org/abs/1805.11471v1http://arxiv.org/pdf/1805.11471v1