1 / 12

BioHarvesting: Use of Natural Forms For Photonics

BioHarvesting: Use of Natural Forms For Photonics. Richard A. Vaia Air Force Research Laboratory, Materials & Manufacturing Directorate. Funding: Bio-Inspired Concept Theme, Air Force Office of Scientific Research (AFOSR) Asian Office of Aerospace Research & Development (AOARD)

roddy
Télécharger la présentation

BioHarvesting: Use of Natural Forms For Photonics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BioHarvesting: Use of Natural Forms For Photonics Richard A. Vaia Air Force Research Laboratory, Materials & Manufacturing Directorate Funding: Bio-Inspired Concept Theme, Air Force Office of Scientific Research (AFOSR) Asian Office of Aerospace Research & Development (AOARD) Air Force Research Lab/Materials & Manufacturing Dir. (AFRL/ML) Collaborative Center for Polymer Photonics (CCPP)

  2. BioHarvesting Natural Forms Team Prof. Sergei Lyuksyutov Univ. Akron Prof. Liming Dia Univ. Akron Prof. Edwin Thomas MIT Sam Ha MIT Edwin Chan MIT/U. Mass Prof. Paul Matsudaira Whitehead Institute Jennifer Shin Whitehead Institute Dr. Andrew Smith Natural History Museum, London, UK Dr. Terje Dokland Inst. Molecular and Cell Biology, Singapore Prof. Vernon Ward Univ. Otago Jason Brunton Univ. Otago Shane Juhl AFRL/ML Ryan Kramer AFRL/ML Dr. Corey Radloff AFRL/ML Dr. Morley Stone AFRL/ML Dr. Rajesh Naik AFRL/ML Dr. Joe Constantino AFRL/ML Dr. Barry Farmer AFRL/ML John Murry AFRL/ML

  3. BioHarvesting Natural Forms For Photonics Introduction: Photonic Band Gap Materials Bio-Templating Scaffolds and Top-Down Replication Bio-Colloids Self, Forced & Directed Assembly Summary

  4. 0.3a, e =12.96 0.7a, e=1 Periodic Potential: efluct(r) a Periodic function: E(r) e(x) = e0efluct(x) S. John, Univ. Toronto Andrew Reynolds, Univ. Glasgow Photonic Band Gap Materials(PBGs) Periodicity (L) + Dielectric Contrast (e) + Geometry = forbidden frequency for wave propagation (photonic band gap)

  5. k 2r k morphology continuum ls <ls> Periodic Random Photonic Band Gap Materials(PBGs) Periodicity (L) + Dielectric Contrast (e) + Geometry = forbidden frequency for wave propagation (photonic band gap)

  6. Challenge:Approaches for ‘Large Area’ PBG Fabrication • Methods to form ordered, anisotropic structures • Microcontact printing • Block copolymer templating • Colloidal crystal processing • Lithography (nano) • Holography • TPA MicroFab • Surfactant(micelle) directed • Pattern-directed dewetting • Polyelectrolyte deposition • …. • Trade-offs • Cost-effect, rapid access to ‘complex’ structures • ‘Defect’ engineering Role for Natural Forms? Bio-chemical Approaches? 3d silicon arrays Lin et. al., MRS Woodpile E. Ozbay; S. Noda; S. Lin Selenium, inverse FCC Braun, et. al, Adv. Mat Microcircuitry Joannopoulis

  7. Interference / Iridescence • 1D: Morpho Butterfly, Abalone Shells, Humming Bird • 2D: Sea Mouse • 3D: Opals Structural Color in Nature Scattering Rayleigh

  8. Top-Down: Replication Bottom-Up: Assembly 100 nm scale bar = 15 nm Scheuring, S.; et al. Mol. Microbiol. 2002, 44(3), 675-684. Sara, M.; et al J. Bacteriol. 2000, 182(4), 859. Structure and Form in Nature Chem. Mater. 9: 1731-1740, 1997 Proc. Natl. Acad. Sci. 95: 6234-6238, 1998

  9. BioHarvesting Natural Forms For Photonics Introduction: Photonic Band Gap Materials Bio-Templating Scaffolds and Top-Down Replication Bio-Colloids Self, Forced & Directed Assembly Summary

  10. Mathematician’s Cidaris Cidaris Skeletal graph of the P-surface Gap Map Schwartz’s P-Surface “Plumber’s Nightmare” 2-3 Gap Closes 3.75:1 5-6 Gap Closes 3:1 Image from http://www.msri.org/publications/sgp/jim/geom/level/skeletal/index.html Level Set Equation 10(cosx + cosy + cosz) – 5(cosx cosy + cosy cosz + cosz cosx) = t Ha, et al.

  11. Various Stereom Morphologies Smith, A.B. “The stereom microstructure of the echinoid test.” Special Papers in Palaeontology, 25, p.1 (1981). Andrew B. Smith Department of Paleontology, Natural History Museum Ha, et al.

  12. Size Reduction & Infiltration Scheme Inverse SiO2 Structure Native Structure Ha, et al.

More Related