Abstract
Optical devices capable of suppressing diffraction nature of light are of great technological importance to many nanophotonic applications. One important technique to achieve diffractionless optics is to exploit field canalization effect. However, current technological platforms based on metamaterial structures typically suffer from strict loss-confinement trade-off, or lack dynamic reconfigurability over device operations. Here we report an integrated canalization platform that can alleviate this performance trade-off. It is found that by leveraging material absorption of anisotropic 2D materials, the dispersion of this class of materials can flatten without increasing propagation losses and compromising confinement. The realization of such plasmon canalization can be considered using black phosphorus (BP), where topological transition from elliptic to hyperbolic curves can be induced by dynamically leveraging material absorption of BP. At the transition point, BP film can support long range, deeply subwavelength, near-diffractionless field propagation, exhibiting diffraction angle of 5.5°, propagation distance of 10λspp, and λspp < λ0/300.
Highlights
Technological platforms that can suppress the diffraction of light have been studied extensively as they can be utilized in applications that are restricted by diffraction limit such as nearfield spectroscopy, microscopy, energy harvesting, construction of self-trapping devices and free-space optical communications[1,2,3,4,5]
Plasmonic waveguides, constructed using 2D plasmonic materials have emerged as a popular optical platform for the realization of photonic devices on a deep subwavelength scale
We will discuss the opportunities afforded by leveraging material absorption to achieve flatband this case can be expressed as: σz kz4r σ2x 4σz kx[4]
Summary
Technological platforms that can suppress the diffraction of light have been studied extensively as they can be utilized in applications that are restricted by diffraction limit such as nearfield spectroscopy, microscopy, energy harvesting, construction of self-trapping devices and free-space optical communications[1,2,3,4,5]. It is shown that a more diffracting, elliptic wavefront is observed in the low material absorption regime, whereas a more confined, hyperbolic-like wavefront can be observed in the high dispersion within anisotropic 2D materials, which can allow canalization of optical fields in a 2D integrated setting.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
