公开(公告)号：US20180047856A1

公开(公告)日：2018-02-15

申请号：US15555132

申请日：2016-03-01

申请人： UNIVERSITY OF MARYLAND, COLLEGE PARK ,  THE GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY ,  MONASH UNIVERSITY

发明人： XINGHAM CAI ,  ANDREI B. SUSHKOV ,  MOHAMMAD K. JADIDI ,  DAVID KURT GASKILL ,  THOMAS E. MURPHY ,  MICHAEL FUHRER ,  HOWARD DENNIS DREW

IPC分类号： H01L31/028 ,  H01L31/0224 ,  G02B5/00 ,  H01L31/18 ,  H01L31/103 ,  G02B5/30 ,  H01L31/0352 ,  H01L31/0232

CPC分类号： H01L31/028 ,  B82Y30/00 ,  G02B5/008 ,  G02B5/3058 ,  H01L29/1606 ,  H01L31/0224 ,  H01L31/022408 ,  H01L31/02327 ,  H01L31/035281 ,  H01L31/08 ,  H01L31/09 ,  H01L31/103 ,  H01L31/1804 ,  H01S4/00 ,  Y02E10/547

摘要： A plasmon-enhanced terahertz graphene-based photodetector exhibits an increased absorption efficiency attained by utilizing a tunable plasmonic resonance in sub-wavelengths graphene micro-ribbons formed on SiC substrate in contact with an array of bi-metallic electrode lines. The orientation of the graphene micro-ribbons is tailored with respect to the array of sub-wavelengths bi-metallic electrode lines. The graphene micro-ribbons extend at the angle of approximately 45 degrees with respect to the electrode lines in the bi-metal electrodes array. The plasmonic mode is efficiently excited by an incident wave polarized perpendicular to the electrode lines, and/or to the graphene micro-ribbons. The absorption of radiation by graphene is enhanced through tunable geometric parameters (such as, for example, the width of the graphene micro-ribbons) and control of a carrier density in graphene achieved through tuning the gate voltage applied to the photodetector.

公开(公告)号：US20180315880A1

公开(公告)日：2018-11-01

申请号：US15735662

申请日：2016-06-14

申请人： UNIVERSITY OF MARYLAND, COLLEGE PARK

发明人： MOHAMMAD M. JADIDI ,  ANDREI B. SUSHKOV ,  DAVID KURT GASKILL ,  MICHAEL FUHRER ,  HOWARD DENNIS DREW ,  THOMAS E. MURPHY

IPC分类号： H01L31/09 ,  G01N21/3581

CPC分类号： H01L31/09 ,  G01N21/3581 ,  G01N2021/258 ,  H01G9/2045 ,  Y02E10/542

摘要： A new approach to graphene-enabled plasmonic resonant structures in the THz is demonstrated in a hybrid graphene-metal design in which the graphene acts as a gate-tunable inductor, and metal acts as a capacitive reservoir for charge accumulation. A large resonant absorption in graphene can be achieved using the metal-graphene plasmonic scheme, and the peak can approach 100% in an optimized device, ideal for graphene-based THz detectors. Using high mobility graphene (μ>50000 cm2V−1s−1) will allow anomalously high resonant THz transmission (near 100%) through ultra-subwavelength graphene-filled metallic apertures at a resonance frequency that is gate tunable. This metal-graphene plasmonic scheme enables near perfect tunable THz filter or modulator.