1. Classical electrodynamics, spring 2007

2. suggested topics
Goos-Hanchen effect, Imbert-Federov effect
surface plasmon, plasmonics
ultraslow light
fast light and causality
Rotating light
EM wave in ionosphere
multiferroics
left-handed material
various types of antenna
wireless energy transfer
EM wave scattering by a sphere
polarization in the sky
...

3. Goos-Hanchen effect (forward jump) and
Imbert-Federov effect (side jump)
Imbert, Phys. Rev. D, 1972

4. Fresnel’s equations
(E // plane of incidence, nonmagnetic) wi wt

5. Surface plasma (for E // plane of incidence only)
SP dispersion
SP cannot be excited by just shining a light
Barnes, Dereux, and Ebbesen, Nature 2003

6. Enhanced transmission by concentric periodic grooves
Light in a tiny hole
Ozbay, Science 2006

7. Metal surface with periodic structure
Plasmonics (light on a wire)
Genet and Ebbesen, Nature 2007

8. Dielectric function and refraction coefficient
anomalous dispersion often accompanied by strong absorption
wave form is strongly distorted, which makes the concept of “group velocity” useless
undistorted pulse is NOT impossible (S. Chu, 1982 PRL), but will be attenuated
Figs from
farside.ph.utexas.edu/teaching/jk1/lectures/node68.html

9. Slow light AC Stark shift
Electromagnetically induced transparency (EIT)
micro ring resonator
stimulated Brillouin scattering (SBS) …
w/o pumping w/ pumping
Xiao et al, PRL 1995

10. Coupled-resonator induced transparency (CRIT)
different designs:
Xu, et al, PRL 2006
Due to destructive interference between 2 absorbing pathways
Spheres
Disks
others

11. Fast light fast/loss gain/slow
Gain doublet
Fast light
(Wang et al, Nature 2000)
fast/loss gain/slow
Is it possible to get both fast and gain?

12. Greatly attenuated and “front-loaded”
Pulse re-shaping
Greatly attenuated and “front-loaded”
the peak can exit the cell “before” the reference pulse’s arrival
group velocity can > C but signal (front) velocity always < C
Stenner et al, Nature 2003

13. Rotating light
Colloidal particles trapped in an optical vortex (Grier, Nature 2003)

14. suggested topics
Goos-Hanchen effect, Imbert-Federov effect
surface plasmon, plasmonics
ultraslow light
fast light and causality
Rotating light
EM wave in ionosphere
multiferroics
left-handed material
various types of antenna
wireless energy transfer
EM wave scattering by a sphere
polarization in the sky
...

15.   Grand unified diagram of electromagnetism 1 1
(electric) Gyrotropic material
multiferroics
No propagating wave
ferromagnet 1
Plasma
ferroelectric  1
(magnetic) Gyrotropic material
Left-handed material
No propagating wave

17. Multiferroics

18. Left-handed material (Veselego, 1968)
reverse Doppler shift
backward Cherenkov radiation
… etc

19. Linden and Hormann, Optical Express 2006

20. suggested topics
Goos-Hanchen effect, Imbert-Federov effect
surface plasmon, plasmonics
ultraslow light
fast light and causality
Rotating light
EM wave in ionosphere
multiferroics
left-handed material
various types of antenna
wireless energy transfer
EM wave scattering by a sphere
polarization in the sky
...

21. Radio & microwave regions (3 kHz – 300 GHz)

22. antennas
Yagi-Uda (八木 -宇田) antenna
dipole
Corner reflector
monopole

24. Wireless energy transfer
Tesla’s tower at Waldenclyffe (1901)
Product from Splashpower
Short range
Long range
Soljacic, MIT (2006)
Mid-range
1) Power from mains to antenna, which is made of copper
2) Antenna resonates at a frequency of 6.4MHz, emitting electromagnetic waves
3) 'Tails' of energy from antenna 'tunnel' up to 5m (16.4ft)
4) Electricity picked up by laptop's antenna, which must also be resonating at 6.4MHz. Energy used to re-charge device
5) Energy not transferred to laptop re-absorbed by source antenna. People/other objects not affected as not resonating at 6.4MHz
From BBC news

25. Rayleigh scattering, Mie scattering

26. Light scattering regimes
Particle size/wavelength
Refractive index
Mie Scattering
Rayleigh Scattering
Totally reflecting objects
Geometrical optics
Rayleigh-Gans Scattering
Large ~ ~0
~ ~ Large
There are many regimes of particle scattering, depending on the particle size, the light wavelength, and the refractive index.
Air
Rainbow

27. Skylight is polarized if the sun is to your side.
Right-angle scattering
is polarized
This polarizer transmits
horizontal polarization
(of which there is very little).
Polarizer transmitting vertical polarization
Multiple scattering yields some light of the other polarization.
In clouds, much multiple scattering occurs, and light there is
unpolarized.

28. Polarization in the sky
Smith, Am. J. Phys. 2007
Tail-wagging dance of the bee
(K.v. Frisch 1944)
Haidinger’s brush (1844)
wikipedia

29. The end