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Opt Lett. 2004 Dec 01;29(23):2791-3. doi: 10.1364/ol.29.002791.

Diminished normal reflectivity of one-dimensional photonic crystals due to dielectric interfacial roughness.

Optics letters

Karlene Rosera Maskaly, Garry R Maskaly, W Craig Carter, James L Maxwell

Affiliations

  1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. [email protected]

PMID: 15605507 DOI: 10.1364/ol.29.002791

Abstract

Dielectric reflectors that are periodic in one dimension, also known as one-dimensional photonic crystals (1DPCs), have become extremely useful tools in the optics industry due to the presence of wavelength-tunable photonic bandgaps. However, little is known about the practical effects of manufacturing defects, such as interfacial roughness, on this technologically useful property of 1DPCs. We employ a finite-difference time-domain code to gain further insight into the effect of interfacial roughness on the reflectivity of quarter-wave-tuned 1DPCs in the center of the bandgap at normal incidence. This provides an estimate of the magnitude of the effect of the roughness for even the most-robust incidence conditions.

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