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18 September 2018 Quantum and classical phenomena in bio-plasmonic nanostructures and assemblies (Conference Presentation)
Alexander Govorov, Lucas Besteiro
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Proceedings Volume 10734, Quantum Nanophotonics 2018; 107340F (2018) https://doi.org/10.1117/12.2323391
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States
Abstract
Metal nanocrystals and semiconductor quantum dots have the ability to absorb and scatter light very efficiently. This study concerns special designs of hybrid nanostructures with electromagnetic hot spots, where the electromagnetic field becomes strongly enhanced and concentrated. Overall, plasmonic nanostructures with hot spots demonstrate strongly amplified optical and energy-related effects: (1) Using nanoparticle arrays made of different metals, one can transfer plasmonic signals coherently and with small losses [1]. (2) Plasmonic hot spots efficiently generate energetic electrons, which can be used for photochemistry and photodetection [2,3]. (3) Nanostructures with hot spots can strongly enhance the optical generation of heat, and also confine high photo-temperatures in small volumes [4,5,6]. (4) Colloidal nanocrystal assemblies and metasurfaces with plasmon resonances allow us to strongly enhance chiral optical responses (circular dichroism) of biomolecules and drugs [7,8,9]. [1] E.-M. Roller, et al., Nature Physics, 13, 761 (2017). [2] A.O. Govorov, H. Zhang, H.V. Demir and Y. K. Gun’ko, Nano Today 9, 85 (2014). [3] H. Harutyunyan, et al., Nature Nanotech. 10, 770 (2015). [4] A. O. Govorov and H. Richardson, Nano Today 2, 20 (2007). [5] C. Jack, et al., Nat. Commun. 7, 10946 (2016). [6] X.-T. Kong, et al., Nano Letters, DOI: 10.1021/acs.nanolett.7b05446 [7] A. O. Govorov, et al., Nano Letters 10, 1374–1382 (2010). [8] A. Kuzyk, et al., Nature 483, 311 (2012). [9] X.-T. Kong, et al., Nano Letters 17, 5099–5105 (2017).
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Alexander Govorov and Lucas Besteiro "Quantum and classical phenomena in bio-plasmonic nanostructures and assemblies (Conference Presentation)", Proc. SPIE 10734, Quantum Nanophotonics 2018, 107340F (18 September 2018); https://doi.org/10.1117/12.2323391
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KEYWORDS
Nanostructures
Nanolithography
Plasmonics
Electromagnetism
Metals
Nanocrystals
Light scattering
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