Bias-free and compact mode-matched excitation of THz coaxial waveguides

Miguel Navarro-Cia; Jiang Wu; Huiyun Liu; Oleg Mitrofanov

doi:10.1109/IRMMW-THz.2016.7758478

Bias-free and compact mode-matched excitation of THz coaxial waveguides

Miguel Navarro-Cia, Jiang Wu, Huiyun Liu, Oleg Mitrofanov

Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

The large mode mismatch between free-space linearly-polarized beams and radially-polarized modes supported in coaxial waveguides leads to a very poor coupling efficiency that have hindered the widespread use of THz coaxial
waveguides. We show here a straightforward coupling mechanism that promises 100% efficiency. We exploit the THz pulse generation process from photoexcited charge density gradients to create a radially-polarized THz pulse with the profile matching the fundamental mode profile of the coaxial waveguide. Single mode propagation is demonstrated at the output of the coaxial waveguide

Original language	English
Title of host publication	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Number of pages	2
Volume	CFP16IMM‐ART
ISBN (Print)	978‐1‐4673‐8485‐8
DOIs	https://doi.org/10.1109/IRMMW-THz.2016.7758478
Publication status	Published - Oct 2016

Keywords

Terahertz
Photocurrent
Semiconductor
coaxial transmission lines
Near-field time-domain microscopy

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10.1109/IRMMW-THz.2016.7758478

Cite this

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title = "Bias-free and compact mode-matched excitation of THz coaxial waveguides",

abstract = "The large mode mismatch between free-space linearly-polarized beams and radially-polarized modes supported in coaxial waveguides leads to a very poor coupling efficiency that have hindered the widespread use of THz coaxialwaveguides. We show here a straightforward coupling mechanism that promises 100% efficiency. We exploit the THz pulse generation process from photoexcited charge density gradients to create a radially-polarized THz pulse with the profile matching the fundamental mode profile of the coaxial waveguide. Single mode propagation is demonstrated at the output of the coaxial waveguide",

keywords = "Terahertz, Photocurrent, Semiconductor, coaxial transmission lines, Near-field time-domain microscopy",

author = "Miguel Navarro-Cia and Jiang Wu and Huiyun Liu and Oleg Mitrofanov",

year = "2016",

month = oct,

doi = "10.1109/IRMMW-THz.2016.7758478",

language = "English",

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publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

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Bias-free and compact mode-matched excitation of THz coaxial waveguides. / Navarro-Cia, Miguel; Wu, Jiang; Liu, Huiyun et al.
41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. Vol. CFP16IMM‐ART Institute of Electrical and Electronics Engineers (IEEE), 2016.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Bias-free and compact mode-matched excitation of THz coaxial waveguides

AU - Navarro-Cia, Miguel

AU - Wu, Jiang

AU - Liu, Huiyun

AU - Mitrofanov, Oleg

PY - 2016/10

Y1 - 2016/10

N2 - The large mode mismatch between free-space linearly-polarized beams and radially-polarized modes supported in coaxial waveguides leads to a very poor coupling efficiency that have hindered the widespread use of THz coaxialwaveguides. We show here a straightforward coupling mechanism that promises 100% efficiency. We exploit the THz pulse generation process from photoexcited charge density gradients to create a radially-polarized THz pulse with the profile matching the fundamental mode profile of the coaxial waveguide. Single mode propagation is demonstrated at the output of the coaxial waveguide

AB - The large mode mismatch between free-space linearly-polarized beams and radially-polarized modes supported in coaxial waveguides leads to a very poor coupling efficiency that have hindered the widespread use of THz coaxialwaveguides. We show here a straightforward coupling mechanism that promises 100% efficiency. We exploit the THz pulse generation process from photoexcited charge density gradients to create a radially-polarized THz pulse with the profile matching the fundamental mode profile of the coaxial waveguide. Single mode propagation is demonstrated at the output of the coaxial waveguide

KW - Terahertz

KW - Photocurrent

KW - Semiconductor

KW - coaxial transmission lines

KW - Near-field time-domain microscopy

U2 - 10.1109/IRMMW-THz.2016.7758478

DO - 10.1109/IRMMW-THz.2016.7758478

M3 - Conference contribution

SN - 978‐1‐4673‐8485‐8

VL - CFP16IMM‐ART

BT - 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016

PB - Institute of Electrical and Electronics Engineers (IEEE)

ER -

Bias-free and compact mode-matched excitation of THz coaxial waveguides

Abstract

Keywords

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