Lightspeed is the fastest velocity in the universe. Except when it isn't. Anyone who's seen a prism split white light into a rainbow has witnessed how material properties can influence the behavior of ...

Full coherent control of wave transport and localization is a long-sought goal in wave physics research, which encompasses many different areas from solid-state to matter-wave physics and photonics.

Bloch surface waves (BSWs) are electromagnetic modes confined at the interface between a periodic dielectric multilayer and its surrounding medium. Their low propagation losses, sharp resonance ...

(a) Total internal reflection of two Bloch waves at the interface of the photonic crystal. (b) Guidance condition: as a Bloch wave reflects twice, it duplicates itself. (c) Conventional and ...

Bound states in the continuum (BICs) are a special class of resonant states. Although they have the same momentum and energy as the propagating modes in free space, yet they are not coupled to the ...

Imagine a device that is selectively transparent to various wavelengths of light at one moment, and opaque to them the next, following a minute adjustment. Such a gatekeeper would enable powerful and ...

Charges are accelerated away from each other by the fluctuating electric field from a terahertz laser. (Courtesy: Brian Long) Researchers at the University of California at Santa Barbara in the US ...