Here, we surpass the diffraction limit of light by a new class of all-dielectric artificial materials that are lossless. This overcomes one of the fundamental challenges of light confinement in metamaterials and plasmonics: metallic loss. Our approach relies on controlling the optical momentum of evanescent waves as opposed to conventional photonic devices which manipulate propagating waves. This leads to a counterintuitive confinement strategy for electromagnetic waves across the entire spectrum. We introduce two distinct photonic design principles that can ideally lead to sub-diffraction light confinement without metal. They are i) relaxed total internal reflection and ii) photonic skin-depth engineering. We present initial experimental results on a CMOS compatible platform that prove the enhanced confinement of our all-dielectric metamaterial design.
Saman Jahani and Zubin Jacob, "Photonic skin-depth engineering: universal spin-momentum locking of light (Conference Presentation)," Proc. SPIE 10113, High Contrast Metastructures VI, 1011310 (Presented at SPIE OPTO: February 02, 2017; Published: 28 April 2017); https://doi.org/10.1117/12.2256002.5395679955001.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.