Broadband THz Pulse Non-Colinear Parametric Detection in Slab Lithium Niobate Waveguide

Gabriel Gandubert; Joel Edouard Nkeck; Jonathan Lafreniere-Greig; Xavier Ropagnol; Francois Blanchard

doi:10.1109/PN70808.2026.11657691

Broadband THz Pulse Non-Colinear Parametric Detection in Slab Lithium Niobate Waveguide

Gabriel Gandubert
, Joel Edouard Nkeck
, Jonathan Lafreniere-Greig
, Xavier Ropagnol
, Francois Blanchard

Ecole de technologie supérieure (ETS)
École de technologie supérieure
École de technologie supÉrieure (ÉTS)

Research output: Contribution to journal › Conference article › peer-review

Abstract

Non-colinear parametric detection of broadband terahertz (THz) waves enable high-sensitivity detection through spatial separation of sum- and difference-frequency generation (SFG and DFG). This approach provides an efficient route to sensitive and frequency-resolved THz detection. In this work, we demonstrate non-colinear THz parametric detection using a 20-μ m-thick lithium niobate slab waveguide, where phase matching is governed by the effective THz refractive index of the waveguide rather than the bulk crystal.

Original language	English
Journal	Photonics North, PN
Issue number	2026
DOIs	https://doi.org/10.1109/PN70808.2026.11657691
Publication status	Published - 2026
Event	2026 Photonics North, PN 2026 - Quebec City, Canada Duration: 2 Jun 2026 → 5 Jun 2026

!!!Keywords

Nonlinear optics
Parametric detection
Terahertz detection
Thin-film lithium niobate

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10.1109/PN70808.2026.11657691

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title = "Broadband THz Pulse Non-Colinear Parametric Detection in Slab Lithium Niobate Waveguide",

abstract = "Non-colinear parametric detection of broadband terahertz (THz) waves enable high-sensitivity detection through spatial separation of sum- and difference-frequency generation (SFG and DFG). This approach provides an efficient route to sensitive and frequency-resolved THz detection. In this work, we demonstrate non-colinear THz parametric detection using a 20-μ m-thick lithium niobate slab waveguide, where phase matching is governed by the effective THz refractive index of the waveguide rather than the bulk crystal.",

keywords = "Nonlinear optics, Parametric detection, Terahertz detection, Thin-film lithium niobate",

author = "Gabriel Gandubert and Nkeck, \{Joel Edouard\} and Jonathan Lafreniere-Greig and Xavier Ropagnol and Francois Blanchard",

note = "Publisher Copyright: {\textcopyright} 2026 IEEE.; 2026 Photonics North, PN 2026 ; Conference date: 02-06-2026 Through 05-06-2026",

year = "2026",

doi = "10.1109/PN70808.2026.11657691",

language = "English",

journal = "Photonics North, PN",

issn = "2693-8324",

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number = "2026",

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TY - JOUR

T1 - Broadband THz Pulse Non-Colinear Parametric Detection in Slab Lithium Niobate Waveguide

AU - Gandubert, Gabriel

AU - Nkeck, Joel Edouard

AU - Lafreniere-Greig, Jonathan

AU - Ropagnol, Xavier

AU - Blanchard, Francois

PY - 2026

Y1 - 2026

N2 - Non-colinear parametric detection of broadband terahertz (THz) waves enable high-sensitivity detection through spatial separation of sum- and difference-frequency generation (SFG and DFG). This approach provides an efficient route to sensitive and frequency-resolved THz detection. In this work, we demonstrate non-colinear THz parametric detection using a 20-μ m-thick lithium niobate slab waveguide, where phase matching is governed by the effective THz refractive index of the waveguide rather than the bulk crystal.

AB - Non-colinear parametric detection of broadband terahertz (THz) waves enable high-sensitivity detection through spatial separation of sum- and difference-frequency generation (SFG and DFG). This approach provides an efficient route to sensitive and frequency-resolved THz detection. In this work, we demonstrate non-colinear THz parametric detection using a 20-μ m-thick lithium niobate slab waveguide, where phase matching is governed by the effective THz refractive index of the waveguide rather than the bulk crystal.

KW - Nonlinear optics

KW - Parametric detection

KW - Terahertz detection

KW - Thin-film lithium niobate

UR - https://www.scopus.com/pages/publications/105049061389

U2 - 10.1109/PN70808.2026.11657691

DO - 10.1109/PN70808.2026.11657691

M3 - Conference article

AN - SCOPUS:105049061389

SN - 2693-8324

JO - Photonics North, PN

JF - Photonics North, PN

IS - 2026

T2 - 2026 Photonics North, PN 2026

Y2 - 2 June 2026 through 5 June 2026

ER -

Broadband THz Pulse Non-Colinear Parametric Detection in Slab Lithium Niobate Waveguide

Abstract

!!!Keywords

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