Signature of a three-dimensional photonic band gap observed on silicon inverse woodpile photonic crystals

Details Signature of a three-dimensional photonic band gap observed on silicon inverse woodpile photonic crystals Signature of a three-dimensional photonic band gap observed on silicon inverse woodpile photonic crystals

2010-12-23

arxiv.org/abs/1012.5263v2

Phys. Rev. B 83, 205313 (2011)

Physics

Optics

9 pages, 5 figures

Scientific paper

10.1103/PhysRevB.83.205313

We have studied the reflectivity of CMOS-compatible three-dimensional silicon inverse woodpile photonic crystals at near-infrared frequencies. Polarization-resolved reflectivity spectra were obtained from two orthogonal crystal surfaces corresponding to 1.88 pi sr solid angle. The spectra reveal broad peaks with high reflectivity up to 67 % that are independent of the spatial position on the crystals. The spectrally overlapping reflectivity peaks for all directions and polarizations form the signature of a broad photonic band gap with a relative bandwidth up to 16 %. This signature is supported with stopgaps in plane wave bandstructure calculations and with the frequency region of the expected band gap.

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