公开(公告)号：US20210344168A1

公开(公告)日：2021-11-04

申请号：US17098942

申请日：2020-11-16

Applicant: ZHENGZHOU UNIVERSITY OF AERONAUTICS

Inventor： Yan LI ,  Facheng ZHONG ,  Yanyan WANG ,  Peng YANG ,  Kun XU ,  Pei DING ,  Fanguang ZENG

IPC: H01S5/10 ,  H01S5/04

Abstract: The disclosure provides a nanolaser based on a depth-subwavelength graphene-dielectric hyperbolic dispersive cavity, comprising a pumping light source and the depth-subwavelength graphene-dielectric hyperbolic dispersive cavity; wherein the depth-subwavelength graphene-dielectric hyperbolic dispersive cavity is a spherical or hemispherical hyperbolic dispersive microcavity formed by alternately wrapping a dielectric core with graphene layers and dielectric layers. Because the graphene plasmon has unique excellent performances, such as an electrical adjustability, a low intrinsic loss, a high optical field localization, and a continuously adjustable resonance frequency from mid-infrared to terahertz, compared with a common metal-dielectric hyperbolic dispersive characteristic, a graphene-dielectric hyperbolic dispersive metamaterial used by the disclosure not only may highly localize an energy of an electromagnetic wave in a more depth-subwavelength cavity, but also may reduce an ohmic loss and improve a quality factor.

公开(公告)号：US20230133255A1

公开(公告)日：2023-05-04

申请号：US17974603

申请日：2022-10-27

Applicant: Zhengzhou University of Aeronautics

Inventor： Fanguang ZENG ,  Yan LI ,  Huali MA ,  Peng YANG ,  Mingyu LI ,  Yajuan ZHENG ,  Zhen YAN ,  Ming JIANG ,  Mengyuan ZHAO ,  Zihua DONG ,  Qianqian LI ,  Weichao MA ,  Zhaojun TANG ,  Kun XU ,  Linjie FU

IPC: H01J9/02 ,  H01J37/073 ,  B22F10/28 ,  B22F12/41

Abstract: A quasi-macroscopic cold field emission electron gun and a manufacturing method thereof are provided, which includes a filament device and an electron gun base, wherein the filament device includes a cold cathode filament and a conductive capillary tube, the cold cathode filament passes through one end of the conductive capillary tube and is crimped through a pressing groove device, the other end of the conductive capillary tube is connected to the electron gun base, and the end of the cold cathode filament is the electron emission end. Through the coaxial nesting and pressing deformation of quasi-macroscopic carbon fiber and metal tube and using of the non welding electrical connection method, this technology avoids the problem that it is not easy to form a reliable electrical connection during the welding process due to the poor wettability between carbon fiber and metal.