1. Directional couplers based on long-range air-hole assisted subwavelength waveguides.
- Author
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Weikang Zhou, Xiao Liang, Canbin Lin, Lintao Liu, Jin Tao, and Xu Guang Huang
- Subjects
DIRECTIONAL couplers ,FINITE difference time domain method ,PHOTONICS ,FINITE difference method ,WAVEGUIDES - Abstract
In this paper, we propose X-type and K-type couplers based on the novel long-range air-hole assisted subwavelength waveguides. A finite-difference time-domain (FDTD) method is used to simulate and analyze their characteristics. The results reveal that both the X-type and K-type couplers have very small transverse widths, which is suitable for high-density photonic integration. The excess losses of two couplers are less than 0.25 dB in one coupling period. Also, they can be integrated with other long-range air-hole assisted subwavelength waveguide devices to constitute large-scale planar integrated functional systems, which cannot be achieved by other waveguide couplers. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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