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Electromagnetic Black Hole Made of Metamaterials

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Electromagnetic Black Hole Made of Metamaterials B96901128 Outline 1. Introduction 2. Theory & Structures 3. Experiments & Results 4. – PowerPoint PPT presentation

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Title: Electromagnetic Black Hole Made of Metamaterials


1
Electromagnetic Black Hole Made of Metamaterials
  • B96901128 ???

2
Outline
  • 1. Introduction
  • 2. Theory Structures
  • 3. Experiments Results
  • 4. Conclusions
  • 5. References

3
What is Black Hole?
  • 1. Laplaces view
  • 2. Schwarzschilds solution of Einsteins vacuum
    field equation (general relativity)

4
Analogy Between Mechanics and Electromagnetic
  • Curved space----inhomogeneous metamaterial
  • Least action principle----Fermats principle

5
Characteristics
  • Non-resonant structurebroad band light
    absorption
  • Omnidirectional
  • Lossy core and lossless shell.

6
Usage
  • Cross-talk reduction
  • Thermal light emitting source
  • Solar light harvesting

7
Theoretic Analysis
  • Hamilton equations
  • pgeneralized momentum qgeneralized coordinate
  • H Hamiltonian

8
Theoretic Analysis
  • For cylindrical structure,
  • use semiclassical analysis3
  • Inhomogeneous permittivity different
    potential.

9
Inhomogeneous Permeability
  • For n-1, 1, 2, 3
  • Choose n2
  • easiest to fabricate

10
Structures
  • Lossy circular inner coreELC resonator (20
    layers)
  • Lossless circular shellI-shaped metamaterials
    (40 layers)

11
ELC resonator
  • t1.6mm,g0.3mm,p0.15mm,s0.65mm
  • Resonate at 18GHz

12
I-shaped
  • w0.15mm, q1.1mm, 18GHz
  • Different m, different e

13
Experiment condition
  • 18GHz
  • Cell 1.8mm
  • R108mm, Rc36mm, height5.4mm
  • Fabricate on styrofoam board
  • Parallel-plate waveguide near-field scanning
    system to measure

14
Simulation
  • Gaussian beam
  • Absorbing rate 99.94, 98.72

15
Simulation Experiment
  • Narrow beam simulation, experiment

16
Simulation of Plane wave
  • Electric field and power flow.

17
Simulation Experiment
  • Nearby source excitation.

18
Optical Frequency
  • R20µm, Rc8.4µm, ?1.5 µm

19
Conclusion
  • Designed, fabricated, and measured an
    electromagnetic black hole.
  • Really useful in solar light harvesting?

20
Reference
  • 1 Cheng,Q., Cui,T.J., Jiang,W.X., Cai,B.G. An
    electromagnetic black hole made of metamaterials,
    2009
  • 2 Narimanov, E. E., Kildishev, A. V. Optical
    black hole Broadband omnidirectional light
    absorber. Appl.Phys. Lett. 95, 041106 (2009).
  • 3 Landau, L. D., Lifshitz, E. M. The
    Classical Theory of Fields, 4th ed. (Butterworth
    Heinemann, 1999).
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