epsilon-near-zero (enz) materials  (Photonics Inc)

Journal: Scientific Reports

Article Title: All-optical phase control in nanophotonic silicon waveguides with epsilon-near-zero nanoheaters

doi: 10.1038/s41598-021-88865-6

Figure Lengend Snippet: Illustration of the proposed all-optical phase shifter. The optical heater is an ENZ material that heats up due to the absorbed optical power of the TM polarized mode. The phase shift is induced for TE polarization by exploiting the silicon thermo-optic coefficient and leads to low optical loss due to the pass polarizer operation of the hybrid waveguide section.

Article Snippet: Thermo-optic all-optical phase tuning is achieved using an ENZ material as a compact, low-loss, and efficient optical heat source.

Techniques:

Journal: Scientific Reports

Article Title: All-optical phase control in nanophotonic silicon waveguides with epsilon-near-zero nanoheaters

doi: 10.1038/s41598-021-88865-6

Figure Lengend Snippet: Derived parameters from the complex effective index of TE and TM modes of the hybrid ENZ/Si waveguide as a function of the loss of the ENZ material, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\varepsilon _{ENZ}''$$\end{document} ε ENZ ′ ′ , and for different ENZ layer thickness, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$t_{ENZ}$$\end{document} t ENZ . Propagation loss for ( a ) TE and ( b ) TM polarized modes. ( c ) Figure of merit. ( d ) Real part of the effective index for the TE mode. Values are given for \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\lambda =1550$$\end{document} λ = 1550 nm while imposing \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\varepsilon _{ENZ}'=0$$\end{document} ε ENZ ′ = 0 .

Article Snippet: Thermo-optic all-optical phase tuning is achieved using an ENZ material as a compact, low-loss, and efficient optical heat source.

Techniques: Derivative Assay