| Issue |
Europhys. Lett.
Volume 50, Number 4, May II 2000
|
|
|---|---|---|
| Page(s) | 466 - 472 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2000-00292-4 | |
| Published online | 01 September 2002 | |
Photonic crystals of coated metallic spheres
FOM Institute AMOLF - Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
Received:
23
August
1999
Accepted:
15
March
2000
It is shown that simple face-centered-cubic (fcc) structures of
both metallic and coated metallic spheres are ideal candidates to achieve
a tunable complete photonic bandgap (CPBG) for optical wavelengths using
currently available experimental techniques.
For coated microspheres with the coating width to plasma
wavelength ratio 
and the coating and host refractive indices 
and 
, respectively,
between 1 and 1.47, one can always find a
sphere radius 
such that the relative gap width 
(gap width to midgap frequency ratio) is larger
than 
and, in some cases, can exceed 
.
Using different coatings and supporting liquids, the width and
midgap frequency of a CPBG can be tuned considerably.
PACS: 42.70.Qs – Photonic bandgap materials / 82.70.Dd – Colloids / 42.70.Nq – Other nonlinear optical materials; photorefractive and semiconductor materials
© EDP Sciences, 2000
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