  Increased interest in pushing the frontier of gravitational wave searches to
higher frequencies (kHz and beyond) has resulted in a variety of different
proposed experimental concepts. A significant fraction of them are based on the
coupling between classical electromagnetism and gravity. We highlight some
differences and similarities between different approaches, showcasing the rich
phenomenology arising from this coupling. We use the opportunity to re-derive
the response function of interferometers as the low-frequency limit of a
broader picture. This article was prepared as proceedings for Moriond Cosmology
2024.
