Low loss Photonic Crystal Cladding Waveguide with Large Photonic Band Gap

2003 ◽  
Vol 797 ◽  
Author(s):  
Yasha Yi ◽  
Peter Bermel ◽  
Shoji Akiyama ◽  
Jessica G. Sandland ◽  
Xiaoman Duan ◽  
...  
Keyword(s):  
Band Gap ◽  
Light Propagation ◽  
Photonic Band Gap ◽  
Waveguide Structure ◽  
Low Loss ◽  
Active Materials ◽  
Optical Amplification ◽  
Potential Applications ◽  
Index Contrast ◽  
Photonic Band

ABSTRACTLight propagation in a low index core (e.g. SiO2) is realized by a Photonic Band Gap (PBG) cladding waveguide structure with large dielectric index contrast layers (Si/Si3N4). The waveguide is fabricated with a CMOS compatible process. The measured loss for the asymmetric PBG cladding waveguide is about 0.5dB/cm for both polarizations at a wavelength of 1550nm. Potential applications include optical amplification when the SiO2 core is doped with optical active materials (e.g. Er).

Reduction of Refractive Index Contrast Threshold for Photonic Band-Gap in Square Lattices

2005 ◽  
Vol 22 (12) ◽  
pp. 3094-3096
Author(s):  
Wang Jian-Feng ◽  
Huang Yi-Dong ◽  
Zhang Wei ◽  
Peng Jiang-De
Keyword(s):  
Refractive Index ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Contrast Threshold ◽  
Refractive Index Contrast ◽  
Index Contrast ◽  
Photonic Band

Low Loss Plastic Terahertz Photonic Band-Gap Fibres

2008 ◽  
Vol 25 (11) ◽  
pp. 3961-3963 ◽  
Author(s):  
Geng You-Fu ◽  
Tan Xiao-Ling ◽  
Zhong Kai ◽  
Wang Peng ◽  
Yao Jian-Quan
Keyword(s):  
Band Gap ◽  
Photonic Band Gap ◽  
Low Loss ◽  
Photonic Band

scholarly journals Isotropic properties of the photonic band gap in quasicrystals with low-index contrast

2011 ◽  
Vol 84 (12) ◽  
Author(s):  
Priya Rose T. ◽  
E. Di Gennaro ◽  
G. Abbate ◽  
A. Andreone
Keyword(s):  
Band Gap ◽  
Photonic Band Gap ◽  
Index Contrast ◽  
Photonic Band

Novel applications of photonic band gap materials: Low‐loss bends and high Q cavities

1994 ◽  
Vol 75 (9) ◽  
pp. 4753-4755 ◽  
Author(s):  
Robert D. Meade ◽  
A. Devenyi ◽  
J. D. Joannopoulos ◽  
O. L. Alerhand ◽  
D. A. Smith ◽  
...  
Keyword(s):  
Band Gap ◽  
Photonic Band Gap ◽  
Low Loss ◽  
High Q ◽  
Photonic Band Gap Materials ◽  
Novel Applications ◽  
Photonic Band

EXISTENCE OF A PHOTONIC BAND GAP AND UNDERLYING PHYSICAL PROCESSES

2001 ◽  
Vol 15 (16) ◽  
pp. 529-534 ◽  
Author(s):  
G. K. JOHRI ◽  
AKHILESH TIWARI ◽  
SAUMYA SAXENA ◽  
MANOJ JOHRI
Keyword(s):  
Refractive Index ◽  
Band Gap ◽  
Lattice Structure ◽  
Photonic Band Gap ◽  
Filling Fraction ◽  
Refractive Index Contrast ◽  
Fcc Lattice ◽  
Index Contrast ◽  
Scattering Strength ◽  
Photonic Band

Mechanisms of the overlapping of gaps due to a refractive index difference minimum and Anderson localization for photonic band gap (PBG) have been used and they give a refractive index contrast difference of less than two percent for X-, L-, and W-points of the Brillouin zone for the pseudogap. Another physical process for the existence of PBG is the use of scattering strength (ε r ≥ 1) for fcc lattice structure. We have found refractive index contrast in the range 2.41–14.21 for the existence of the complete photonic band gap for bound photons (ε r ≥ 1). The lowest limit to yield a gap is 2.41 for valence photons (ε r = 1) at volume filling fraction 85.5% for spherical air atoms and at 14.5% for dielectric spheres. This work is reported for the first time and it is useful for maintaining connectivity and for easier fabrication of photonic crystals.

ON THE POSSIBILITY OF SUPPRESSING DIFFRACTION OSCILLATIONS NEAR THE PHOTONIC BAND GAP

2010 ◽  
Vol 24 (09) ◽  
pp. 921-936 ◽  
Author(s):  
A. H. GEVORGYAN
Keyword(s):  
Photonic Crystal ◽  
Band Gap ◽  
Half Space ◽  
Light Propagation ◽  
Photonic Band Gap ◽  
Modified Method ◽  
Photonic Band

Oblique light propagation through a chiral photonic crystal (PC) layer with gradient parameters of modulation is considered. The problem is solved by Ambartsumian's layer addition modified method. It is shown that suppressing of diffraction oscillations near the photonic band gap (PBG) is possible at certain conditions. Thus, at certain conditions, the spectra for the finite PC layer is the same as that for the half space.

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