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

IEEE Photonics Journal

Yang Yue¹  Weijian Yang²  Moshe Tur³  Xue Wang⁴  Connie J. Chang-Hasnain⁵  James Ferrara⁶  Christopher Chase⁶  Vadim Karagodsky⁶  Lin Zhang⁷  Alan E. Willner⁷  Hao Huang⁷ 

[1] $^{1}$Department of Electrical Engineering, University of Southern California, Los Angeles, CA, USA;$^{2}$Department of Electrical Engineering and Computer Sciences , University of California, Berkeley, CA, USA;$^{3}$School of Electrical Engineering, Tel Aviv University, Ramat Aviv, Israel;Department of Electrical Engineering , University of Southern California, Los Angeles, CA, USA;Department of Electrical Engineering and Computer Sciences, University of California , Berkeley, CA, USA;Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, USA;Department of Electrical Engineering, University of Southern California, Los Angeles, CA , USA;

关键词: Waveguides;    engineered photonic nanostructures;    gratings;    subwavelength structures;    optics;   

DOI  :  10.1109/JPHOT.2012.2210279

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown