Prospection Of Invisibility Devices For Space

Prospection of

Invisibility Devices for Space ARIADNA ARIADNA

Final Final Presentation Presentation Study Study 07/7001 07/7001

ARIADNA Final Presentation Study 7001/01,June 2008

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Hot topics in optics Negative refractive materials

POVRAY generated (G. Dolling et al. Opt. Expr. 14, 1842 (2006)

Potential applications •Perfect lenses •Miniaturized optical resonators •Phase compensators

ARIADNA Final Presentation Study 7001/01,June 2008

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Hot topics in optics Transformation optics Originated for designing “adaptive” grids

Possible devices Invisibility Cloak Perfect lens

Hyperlens

C. Croenne, NJP (2008) L. Bergamin, Metamaterials (2008)

J. Zhang, PRB 77 35116 (2008)

ARIADNA Final Presentation Study 7001/01,June 2008

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Hot topics in optics Transformation optics Potential for designing of optical devices x → x0

Possible devices Invisibility Cloak Perfect lens

Hyperlens

C. Croenne, NJP (2008) L. Bergamin, Metamaterials (2008)

J. Zhang, PRB 77 35116 (2008)

ARIADNA Final Presentation Study 7001/01,June 2008

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Hot topics in optics Optical Nanocircuits Example of technology “transfer” Subwavelength nanoparticles as lump circuits

Yagi-Uda RF Antenna

Directors Reflector Source Lumped elements

Nanoparticles

N. Engheta, Science 317 1698 (2007) ARIADNA Final Presentation Study 7001/01,June 2008

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Why are they “Hot”? •Negative refraction: Schuster(1904), Veselago (1968) •Geometrical interp. of

: Post (1965), Landau Lifshitz (1951)

Proposals require “extreme” material conditions

METAMATERIALS Available for λ from GHz to ??? ARIADNA Final Presentation Study 7001/01,June 2008

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Technological evolution of artificial μ

ARIADNA Final Presentation Study 7001/01,June 2008

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Studies performed by Universities + ACT Objective: Design Invisible Devices + route to visible 1. Device design: distribution of

εeff and μeff

Coordinate Transformation Technique and Dipole Cancellation

2. Structural design: distribution of εloc and

μloc

Homogenization techniques: Field Summation and Fresnel Inversion

3. Metamaterials Trade-off Different inclusions: metallic spirals, Ferroelectric rods, trans. lines…

4. Space applications Invisibility shutter, solar pressure effect, THz spectroscopy…

ARIADNA Final Presentation Study 7001/01,June 2008

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Bird´s-eye-view of the Workshop •Coor. Transformation •Cyl. And Sph. Cloaks •Non-orthogonal transf.

•Coor. Transformation •THz applications •Ferroelectrics rods •Hyper-lens

•Dipole canc. •Finite Cyl. Cover •Metallic spirals •Radiation pressure

•Coor. Transformation •Chiral particles •Transmission lines •Invisibility shutter

ARIADNA Final Presentation Study 7001/01,June 2008

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Thank you for your attention!

ARIADNA Final Presentation Study 7001/01,June 2008

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