% !Mode:: "TeX:UTF-8"
\documentclass[tikz]{standalone}
\usepackage{fontspec}
\usepackage{unicode-math}
\usetikzlibrary{positioning}
\usetikzlibrary{calc}
\usetikzlibrary{arrows.meta}
\setmainfont{Libertinus Serif}
\setmathfont{Libertinus Math}
\begin{document}
	\begin{tikzpicture} [
			axis/.style={-Latex,draw=black},
			laxis/.style={font=\bfseries},
		]
		\path [axis] (0,0) -- (12.3,0) node [at end,below,laxis] {z};
		\foreach \a/\b/\col/\lab in {0/1/red/E,-0.5/-0.5/blue/B} {
			\begin{scope} [cm={1,0,\a,\b,(0,0)}]
				\path [axis] (0,0) -- (0,2) node [at end,left,laxis] {\lab};
				\path [draw=\col] (0,0) sin (1.2,2) cos (2.4,0) sin (3.6,-2) cos (4.8,0) sin (6,2) cos (7.2,0) sin (8.4,-2) cos (9.6,0) sin (10.8,2) cos (12,0);
				\foreach \x in {0.3,0.6,...,2.2,2.7,3,...,4.6,5.1,5.4,...,7,7.5,7.8,...,9.4,9.9,10.2,...,12} \draw [color=\col,-Latex] (\x,0) -- (\x,{2*sin(\x*180/2.4)});
			\end{scope}
		}
		\draw [help lines] (4.8,0) --+ (0,2.5) (9.6,0) --+ (0,2.5);
		\node (l) at (7.2,2.5) {$\lambda$};
		\draw [-Latex] (l) -- (4.8,2.5);
		\draw [-Latex] (l) -- (9.6,2.5);
	\end{tikzpicture}
\end{document}