\begin{abstract} In this paper, we study the existence of normalized solutions to the following curl-curl problem \begin{equation*} \left\{ \begin{array}{ll} abla imes abla imes U+V(x)U+\lambda U=|U|^{p-2}U\quad ext{in}\ \mathbb{R}^{N}, \\ \int_{\mathbb{R}^{N}}|U|^2\,\mathrm {d}x=a>0, \end{array} ight. \end{equation*} which originates from the system of Maxwell equations, where $N\geq3$, $2