Biologically enabled sub-diffractive focusing.

Evolution shows that photonic structures are a constituent part of many animals and flora. These elements produce structural color and are useful in predator-prey interactions between animals and in the exploitation of light for photosynthetic organisms. In particular, diatoms have evolved patterned hydrated silica external valves able to confine light with extraordinary efficiency. Their evolution was probably guided by the necessity to survive in harsh conditions of sunlight deprivation. Here, we exploit such diatom valves, in conjunction with structured illumination, to realize a biological super-resolving lens to achieve sub-diffractive focusing in the far field. More precisely, we consider a single diatom valve of Arachnoidiscus genus which shows symmetries and fine features. By characterizing and using the transmission properties of this valve using the optical eigenmode technique, we are able to confine light to a tiny spot with unprecedented precision in terms of resolution limit ratio, corresponding in this case to 0.21λ/NA.

[1]  K. Dholakia,et al.  In situ wavefront correction and its application to micromanipulation , 2010 .

[2]  T. Fuhrmann,et al.  Diatoms as living photonic crystals , 2004 .

[3]  Mark R. Dennis,et al.  A super-oscillatory lens optical microscope for subwavelength imaging. , 2012, Nature materials.

[4]  Luca De Stefano,et al.  Lensless light focusing with the centric marine diatom Coscinodiscus walesii. , 2007, Optics express.

[5]  Kishan Dholakia,et al.  Enhanced cell transfection using subwavelength focused optical eigenmode beams [Invited] , 2013 .

[6]  E. G. van Putten,et al.  Scattering lens resolves sub-100 nm structures with visible light. , 2011, Physical review letters.

[7]  Christian Grillet,et al.  Light transmission of the marine diatom Coscinodiscus wailesii , 2012, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[8]  K. Iyer,et al.  Diatom frustules as light traps enhance DSSC efficiency. , 2013, Nanoscale.

[9]  Kishan Dholakia,et al.  Optical eigenmode imaging , 2011, 1105.5949.

[10]  Alexander Hexemer,et al.  Biomimetic self-templating supramolecular structures , 2011, Nature.

[11]  Dusan Losic,et al.  Diatomaceous Lessons in Nanotechnology and Advanced Materials , 2009 .

[12]  Luca De Stefano,et al.  Nanostructures in diatom frustules: functional morphology of valvocopulae in Cocconeidacean monoraphid taxa. , 2005, Journal of nanoscience and nanotechnology.

[13]  P. Falkowski,et al.  Biogeochemical Controls and Feedbacks on Ocean Primary Production , 1998, Science.

[14]  Mohan Srinivasarao,et al.  Structural Origin of Circularly Polarized Iridescence in Jeweled Beetles , 2009, Science.

[15]  A. Mosk,et al.  Exploiting disorder for perfect focusing , 2009, 0910.0873.

[16]  S. Popoff,et al.  Measuring the transmission matrix in optics: an approach to the study and control of light propagation in disordered media. , 2009, Physical review letters.

[17]  Gerd Leuchs,et al.  Focusing light to a tighter spot , 2000 .

[18]  Michael H. Bartl,et al.  Photonic Structures in Biology: A Possible Blueprint for Nanotechnology , 2014 .

[19]  Miller,et al.  Electromagnetic degrees of freedom of an optical system , 2000, Journal of the Optical Society of America. A, Optics, image science, and vision.

[20]  Wei Chen,et al.  Highly Efficient Light-Trapping Structure Design Inspired By Natural Evolution , 2013, Scientific Reports.

[21]  K. Dholakia,et al.  Enhanced two-point resolution using optical eigenmode optimized pupil functions , 2011 .

[22]  Nikolay I. Zheludev,et al.  Far field subwavelength focusing using optical eigenmodes , 2011 .

[23]  J. Randerson,et al.  Primary production of the biosphere: integrating terrestrial and oceanic components , 1998, Science.

[24]  Luca De Stefano,et al.  Shedding light on diatom photonics by means of digital holography. , 2014, Journal of biophotonics.

[25]  P. Vukusic,et al.  Directionally Controlled Fluorescence Emission in Butterflies , 2005, Science.

[26]  Kishan Dholakia,et al.  Coherent control of plasmonic nanoantennas using optical eigenmodes , 2013, Scientific Reports.

[27]  I. Rendina,et al.  Multi-wavelength study of light transmitted through a single marine centric diatom. , 2010, Optics express.

[28]  Nikolay I. Zheludev,et al.  Super-oscillatory optical needle , 2013 .

[29]  Andrew R. Parker,et al.  Biomimetics of photonic nanostructures. , 2007, Nature nanotechnology.

[30]  M Mazilu,et al.  Optical eigenmodes; exploiting the quadratic nature of the energy flux and of scattering interactions. , 2010, Optics express.

[31]  Leszek Rychlewski,et al.  The Phaeodactylum genome reveals the evolutionary history of diatom genomes , 2008, Nature.