Direct Observation of Phase-Free Propagation in a Silicon Waveguide

作者：Reshef Orad^*; Camayd Munoz Philip; Vulis Daryl I; Li Yang; Loncar Marko; Mazur Eric

来源：ACS Photonics, 2017, 4(10): 2385-2389.

DOI：10.1021/acsphotonics.7b00760

• silicon photonics
• nanophotonics
• metamaterials
• zero refractive index
• interferometry

We demonstrate silicon waveguides that support phase free propagation in the telecom regime. These waveguides have smaller footprints and exhibit improved energy transfer capabilities as compared to previous optical waveguides that support phase advance-free modes. We measure the effective refractive index using on-chip interferometry and observe a zero-crossing around a wavelength of lambda = 1625 nm. At this wavelength, we observe the coherent oscillations of waves that span the entire length of the waveguide. These waveguides are based on a 220-nm-thick silicon-on insulator platform and, thus, are inherently compatible with established silicon photonic technologies.

• 出版日期2017-10