Photonic Band Gap Effect in MidIR Metallic Photonic Crystals

1
Growth of All-Metal 3D Photonic Crystals With a
Large Infrared Band Gap
The tungsten 3D photonic crystal was made by
selectively removing Si from already fabricated
polysilicon/SiO2 structures, and back-filling the
resulting mould with chemical vapour deposited
(CVD) tungsten.
This method could be extended to create almost
any 3D single-crystal metallic photonic crystal
at infrared wavelengths such photonic crystals
have not previously been achievable.
J.G. Fleming, S. Y.Lin, I. El-Kady, R. Biswas,
and K. M. Ho, Nature 417, 52 (2002)
2
Mid-IR Metallic Layer-by-Layer Photonic Crystals
Experimental Transmission, Reflection,
and Absorption Spectra
Unpolarized Incidence
(001)
Z
Reflection
Y
Transmission
Absorption
Wavelength (?m )
4-Layer Tungsten Photonic Crystal a4.2um,
w1.2um, h1.5um
J.G. Fleming et al., Nature 417, 52 (2002)