http://www.cnr.it/ontology/cnr/individuo/prodotto/ID295606

Combining focusing properties of a single diatom valve with optical eigenmodes in ultra-shrinking of light (Contributo in atti di convegno)

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Combining focusing properties of a single diatom valve with optical eigenmodes in ultra-shrinking of light (Contributo in atti di convegno) (literal)

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Lavanga L.; De Tommasi E.; De Luca A.C.; Dardano P.; De Stefano M.; De Stefano L.; Rendina I.; Dholakia K.; Mazilu M. (2014)
Combining focusing properties of a single diatom valve with optical eigenmodes in ultra-shrinking of light
in Complex Light and Optical Forces VIII; San Francisco, CA; United States
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Lavanga L.; De Tommasi E.; De Luca A.C.; Dardano P.; De Stefano M.; De Stefano L.; Rendina I.; Dholakia K.; Mazilu M. (literal)

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National Research Council, Institute for Microelectronics and Microsystems, Department of Naples, Via P. Castellino, I-80131, Naples, Italy; National Research Council, Institute of Protein Biochemistry, Via P. Castellino, I-80131 Naples, Italy; Second University of Naples, Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Via Vivaldi 43, I-81100 Caserta, Italy; SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St.-Andrews, KY16 9SS, United Kingdom (literal)

Titolo

Combining focusing properties of a single diatom valve with optical eigenmodes in ultra-shrinking of light (literal)

Abstract

It is known that a properly arranged distribution of nanoholes on a metallic slab is able to produce, in far field conditions, light confinement at sub-diffraction and even sub-wavelength scale. The same effect can also be implemented by the use of Optical Eigenmode (OEi) technique. In this case, a spatial light modulator (SLM) encodes phase and amplitudes of N probe beams whose interference is able to lead to sub-wavelength confinement of light focused by an objective. The OEi technique has been already used in a wide range of applications, such as photoporation, confocal imaging, and coherent control of plasmonic nanoantennas. Here, we describe the application of OEi technique to a single valve of a marine diatom. Diatoms are ubiquitous monocellular algae provided with an external cell wall, the frustule, made of hydrated porous silica which play an active role in efficient light collection and confinement for photosynthesis. Every frustule is made of two valves interconnected by a lateral girdle band. We show that, applying OEi illumination to a single diatom valve, we can achieve unprecedented sub-diffractive focusing for the transmitted light. (literal)

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