Canalization of subwavelength images | Prof. Pavel Belov скачать в хорошем качестве

Canalization of subwavelength images | Prof. Pavel Belov

Microwave Seminar at The Department of Physics & Engineering, ITMO | 18 Dec 2020 Timecodes are below the abstract. Prof. Pavel Belov, ITMO University Title: "Canalization of subwavelength images" Abstract: I will review results on subwavelength imaging by means of canalization regime and show results of experiments at microwave, THz and optical freqiuency ranges. 0:00:00 Intro 0:01:16 Introduction by the speaker 0:04:54 Diffraction limit in imaging systems and metamaterials definition 0:07:31 Presentation outline 0:08:47 Perfect lens concept 0:12:45 Concept of canalization 0:15:53 Fabry-Perot resonance based perfect transmission device 0:18:24 Question from George Zograf on the definition of complex angles of incid 0:19:31 Canalization in natural material 0:22:12 Wire medium as subwavelength waveguide 0:23:35 Question from George Zograf on wire thickness in the wire medium 0:24:42 Back to wire medium as subwavelength waveguide 0:27:13 Question from Mikhail Zubkov on array of images in a wire medium 0:27:57 Comment from George Zograf on the superlattice principle 0:29:28 Numerical simulation of wire medium 0:31:31 Experimental verification of a wire medium lens 0:32:39 Bandwidth of wire medium lens operation 0:34:33 Question from George Zograf on the definition of resolution in canalizat 0:37:03 Refined experimental setup for observing wire medium lens canalization 0:39:03 Question from Mikhail Zubkov on the nature of blurring in the image plan 0:40:33 Imaging performance on different frequencies 0:41:53 Imaging in THz range with embedded silver rods 0:43:29 Limits on resolution imposed by skin depth in the wire metal 0:44:45 Imaging in infrared region 0:46:55 Limits to imaging in the visible range 0:48:32 Imaging in the visible range with a layered metal-dielectric structures 0:54:24 Hyperlens for magnification and demagnification of images 0:57:18 Phase compensation in magnification/demagnification experiments 0:58:43 Flexible near-field endoscope 0:59:43 Question on the critical angle for endoscope function 1:03:09 Conclusions 1:04:30 Question from Sergei Kosulnikov on the possible metamaterial development 1:08:57 Question from Oleg Yermakov on wire medium dispersion properties 1:12:55 Question from George Zograf on similarity to other near-field microscopy 1:15:16 Questions from Mikhail Zubkov on field focusing during demagnification a 1:21:20 Comment from George Zograf on scanning electron microscopy 1:23:10 End The Department of Physics and Engineering of ITMO University (Saint Petersburg, Russia) hosts online weekly seminars to discuss recent scientific achievements of researchers from all over the world with a wide audience. The topics include experimental (Optical seminar) and theoretical (Theoretical seminar) aspects of nanophotonics, solid-state physics, material science, as well as design and applications of radiofrequency structures and devices (Microwave seminar). Upcoming and past events can be found at https://physics.itmo.ru/en/seminars   / physics.itmo     / physics_itmo     / physics.itmo   #MicrowaveSeminar #ITMO #новыйфизтех #scientificseminar