=12, r=0.2a

r=0.3a

Red = TE (E-field parallel to plane of periodicity)Blue = TM (E-field perpendicular to plane of periodicity)

http://ab-initio.mit.edu/photons/tutorial/photonic-intro.pdf

Dielectric columns in air

negative positive

Dielectricband

Airband

TMD-field

TEH-field

negative positive

Dielectricband

Airband

Dielectric veins in air

FROM: Photonic Crystals by J.D. Joannopoulos, R.D. Meade, J.N. Winn (Princeton Univ. Press: NJ, 1995)

Assumes =11.4

0.46

0.45

0.14

Requires feature size of ~ 54 nm

Requires feature size of ~ 420 nm