INVESTIGATION OF CYCLOTRON RADIATION FROM GRAPHENE-BASED DEVICES
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Authors
Planillo, Jordan
Subjects
terahertz
nanomaterials
5G
non-destructive inspection
band-conversion
solid-state cyclotron
nano-cyclotron
infrared
IR
far infrared
FIR
nanomaterials
5G
non-destructive inspection
band-conversion
solid-state cyclotron
nano-cyclotron
infrared
IR
far infrared
FIR
Advisors
Alves, Fabio Durante Pereira
Date of Issue
2023-09
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
Current solutions to address the terahertz gap—the range of frequencies from 0.3 THz to 3.0 THz in the electromagnetic spectrum—fall into two broad categories: microwave solutions and photonic solutions. The most promising solutions—high electron mobility transistors and quantum cascade lasers—while capable of producing the desired THz frequencies, are limited from widespread use due to cost and operating environment requirements. Graphene’s remarkable material properties have been extensively explored for applications as a replacement forsilicon in integrated circuits to novel biological sensors. Of particular interest is graphene’s exceptionally high carrier mobility and saturation velocity. These properties make it an excellent candidate for a solid state implementation of a cyclotron radiation source. With the appropriate design, a cyclotron style device that emits THz radiation is possible. This work details the modeling, design, simulation, fabrication, and characterization of graphene-based cyclotrons. Simulated finite element graphene arcs indicate that emissions of 1 THz or greater requires an arc radius of 67 nm or less. Fabricated micron scale model on commercial graphene wafers have demonstrated cyclotron radiation emissions at microwave frequencies (3 GHz–4 GHz), which is independent of the applied stimulus frequencies of 1.73 GHz and 10.16 GHz. Fabrication of nanoscale arc arrays exceeding 1 million per square millimeter was also demonstrated.
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Distribution Statement
Distribution Statement A. Approved for public release: Distribution is unlimited.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.