
189Photonic Crystal Biosensors
M
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Wave vector (K)
Band diagram for an infinitely long triangular lattice
photonic crystal of Si (e = 12.5) pillars in air (e =1)
K
TM
TE
M K
G
Normalized frequency (a/λ)
Г
Г
FIGURE 8.7
Band diagram of triangular lattice of silicon rods surrounded by air, solved using MIT Photonic Bands (MPB).
Wave vector (K)
Band diagram for an infinitely long square lattice
photonic crystal of Si (ε = 12.5) pillars in air (ε=1)
Normalized frequency (a/λ)
X
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
K
X K
TE
TM
G
Г
FIGURE 8.8
Band diagram of square lattice of silicon rods surrounded by air, solved using MPB.