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10 March 2020 Directed assembly of 3D nanophotonic systems from building blocks (Conference Presentation)
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Complex 3D nanophotonic devices demand robust methods for the design and rapid prototyping of heterogeneous material structures with sub-100 nm resolution. Here we present an automated optical tweezer platform for assembling nanoparticles of multiple materials. In pursuit of higher throughput, we have demonstrated record nanoparticle manipulation speeds >150 um/s. To design structures, we use a coupled dipole model that is orders of magnitude faster than commercial tools. In developing this method, we have found that a longstanding practice of basing a metallic nanoparticle’s dipole moment on its skin depth is significantly less accurate than calculations based on full particle volume.
Conference Presentation
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Euan McLeod, Jeffrey Melzer, and Weilin Liu "Directed assembly of 3D nanophotonic systems from building blocks (Conference Presentation)", Proc. SPIE 11289, Photonic and Phononic Properties of Engineered Nanostructures X, 112890A (10 March 2020);

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