Three-Dimensional Chirped High-Contrast Grating Hollow-Core Waveguide

A 3-D chirped high-contrast grating hollow-core waveguide (HCG-HW) exhibits highly efficient 2-D (transverse and lateral) light confinement. Compared with step-index ones, laterally chirped HCG-HWs (graded index) can pronouncedly reduce the propagation loss (>; 10×) without compromising the later...

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Bibliographic Details
Published inIEEE photonics journal Vol. 4; no. 5; pp. 1372 - 1380
Main Authors Yang Yue, Lin Zhang, Xue Wang, Hao Huang, Weijian Yang, Ferrara, J., Karagodsky, V., Chase, C., Tur, M., Chang-Hasnain, Connie J., Willner, A. E.
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2012
Subjects
Chirp
engineered photonic nanostructures
Gratings
Indexes
Optical waveguides
optics
Propagation losses
Reflectivity
Silicon
subwavelength structures
Waveguides
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Summary:A 3-D chirped high-contrast grating hollow-core waveguide (HCG-HW) exhibits highly efficient 2-D (transverse and lateral) light confinement. Compared with step-index ones, laterally chirped HCG-HWs (graded index) can pronouncedly reduce the propagation loss (>; 10×) without compromising the lateral index contrast. Simulation results show that a propagation loss as low as 0.04 dB/cm can be achieved. For a chirped HCG-HW with a 6-μm core height, it exhibits 30and 141-nm spectral widths for 0.1and 1-dB/cm loss requirements. The chirped HCG-HW also shows an ultralow nonlinear coefficient, which is on the order of 10 -5 /W/m.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2012.2210279