LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

A mid-infrared biaxial hyperbolic van der Waals crystal

Photo by brambro from unsplash

α-MoO3 is demonstrated as a mid-infrared biaxial hyperbolic crystal supporting in-plane phonon polaritons with concave wavefronts. Hyperbolic media have attracted much attention in the photonics community due to their ability… Click to show full abstract

α-MoO3 is demonstrated as a mid-infrared biaxial hyperbolic crystal supporting in-plane phonon polaritons with concave wavefronts. Hyperbolic media have attracted much attention in the photonics community due to their ability to confine light to arbitrarily small volumes and their potential applications to super-resolution technologies. The two-dimensional counterparts of these media can be achieved with hyperbolic metasurfaces that support in-plane hyperbolic guided modes upon nanopatterning, which, however, poses notable fabrication challenges and limits the achievable confinement. We show that thin flakes of a van der Waals crystal, α-MoO3, can support naturally in-plane hyperbolic polariton guided modes at mid-infrared frequencies without the need for patterning. This is possible because α-MoO3 is a biaxial hyperbolic crystal with three different Reststrahlen bands, each corresponding to a different crystalline axis. These findings can pave the way toward a new paradigm to manipulate and confine light in planar photonic devices.

Keywords: van der; der waals; biaxial hyperbolic; mid infrared; infrared biaxial

Journal Title: Science Advances
Year Published: 2019

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.