Nonlinear optics with resonant metasurfaces
- PDF / 2,119,166 Bytes
- 11 Pages / 585 x 783 pts Page_size
- 40 Downloads / 219 Views
Introduction In recent years, metasurfaces have attracted a great deal of attention from the optics community as highly functional, broadband, and large-area structures for flat-optics components, which are rapidly advancing toward real applications. While the study of linear properties of metasurfaces is already being used in engineering, applications of nonlinear metasurfaces are just beginning to emerge. Detection and generation of light with new frequencies as well as generation and control of single photons for quantum information applications are significant for a range of modern technologies, and they drive research in nonlinear optical metasurfaces to improve both performance and functionalities of photonic devices. In this article, we overview how nonlinear properties of metasurfaces can be engineered for applications. Multipolar interferences and enhanced local and collective resonances drive nonlinear light generation from nanoscale elements, with controlled direction of high-harmonic generation and frequency mixing. The nonlinear processes are empowered by the excitation of electric and magnetic Mie resonances (defined as localized solutions of Maxwell’s equations for subwavelength particles) and their nonlinear material interaction, such as switching the phase of the fundamental and harmonic fields due to the nonlinear response of the component materials and precise control of structural dimensions at the nanoscale.
We concentrate on the most recent achievements in the field, which have been enabled by multiple advances to control light by nanostructured dielectric metasurfaces made from resonant structures and strongly nonlinear materials, (e.g., semiconductors or perovskites). In contrast to the long established field of metal-based plasmonic metasurfaces, their low-loss twin, the field of all-dielectric metasurfaces, has just emerged in the past few years. With respect to the many applications that enable the control of metasurface parameters, dielectric nanostructures fabricated from a multitude of high-index optical materials have already outperformed established metals in particular due to their considerably lower intrinsic losses. Recently, research on dielectric metasurfaces has broadened to active1 and nonlinear structured surfaces, where in addition to the low loss, the increased field overlap of the excited Mie-like resonances with the nonlinear dielectrics and the higher damage threshold became equally important. Though this field is relatively new, it has already attracted substantial attention, since it is expected to enable many advanced photonic applications in imaging, sensing, signal processing, and communication. There have been several recent reviews.2–8 Here, we concentrate on the major processes that enable this progress. We discuss recent new perspectives in materials, technologies, and applications. We start by introducing major linear resonance effects exploited to boost and control the
Thomas Pertsch, Friedrich Schiller University Jena, and Fraunhofer Institute for Applied O
Data Loading...
