lect30 - Alexandra Boltasseva: Nanophotonics METAMATERIALS...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Alexandra Boltasseva: Nanophotonics METAMATERIALS Lecture materials provided by V. Shalaev (Purdue)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Alexandra Boltasseva: Nanophotonics Major breakthroughs are often materials related •S t o n e Age, Iron Age, Si Age, metamaterials •P e o p l e realized the utility of naturally occurring materials c i e n t i s t s are now able to engineer new functional nanostructured materials Is it possible to engineer new materials with useful optical properties •Y e s ! • Wonderful things happen when structural dimensions are ≈ λ light and much less What are the smallest possible devices with optical functionality ? c i e n t i s t s have gone from big lenses, to optical fibers, to photonic crystals, to… •D o e s the diffraction set a fundamental limit? • Possible solution: metal optics/plasmonics/metamaterials Motivation
Background image of page 2
Alexandra Boltasseva: Nanophotonics Outline What are metamaterials? Electrical metamaterials Magnetic metamaterials Negative index metamaterials Perfect lens and superlens Optical cloaking
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Alexandra Boltasseva: Nanophotonics What is a Metamaterial? - Metamaterials are engineered composites tailored for specific electromagnetic properties that are not found in nature and not observed in the constituent materials  = meta = beyond (Greek) A natural material with its atoms A metamaterial with artificially structured atoms
Background image of page 4
Alexandra Boltasseva: Nanophotonics Metamaterial: Not Found in Nature?
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Alexandra Boltasseva: Nanophotonics Metamaterial: Artificial Periodic Structure?
Background image of page 6
Alexandra Boltasseva: Nanophotonics Electromagnetic Properties v.s. Characteristic Sizes a a a Example: Optical crystals Metamaterials Example: Photonics crystals Phased array radar X-ray diffraction optics Example: Lens system Shadows PC-”metamaterials” are not considered
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Alexandra Boltasseva: Nanophotonics Natural Crystals ... have lattice constants much smaller than light wavelengths: a << are treated as homogeneous media with parameters , , n, Z (tensors in anisotropic crystals)
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/12/2012 for the course ECE 414 taught by Professor Alenxendra during the Spring '11 term at Purdue University-West Lafayette.

Page1 / 26

lect30 - Alexandra Boltasseva: Nanophotonics METAMATERIALS...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online