IP Library › Granted Patent US 12,321,048
Granted Patent B2
US 12,321,048 · App. 17/446,801 · Granted Jun 3, 2025

Method and system for time-domain integration of broadband terahertz pulses

Inventors: Alessandro Tomasino (Montréal, CA); Giacomo Balistreri (Longueuil, CA); Junliang Dong (Longueuil, CA); Yoann Jestin (Montréal, CA); Aycan Yurtsever (Longueuil, CA); José Azaña (Montréal, CA); Roberto Morandotti (Montréal, CA)
Assignee: INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE
G02F1/0121H01P3/10G02F2203/13
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Quick Facts
Patent No.
US 12,321,048
App. No.
17/446,801
Granted
Jun 3, 2025
Kind
B2
Abstract

A waveguide for time-domain integration of THz pulses, comprising two wires extending from an input gap g in to an output gap g out at a tapering angle θ relative to a longitudinal axis, a gap of the waveguide decreasing linearly from the input gap g in to the output gap g out , wherein a size of the output gap is at least one order of magnitude smaller than a central wavelength λ THz in a spectrum of the THz pulses, and a method for time-domain integration of THz pulses, comprising confining input THz pulses in the waveguide.

Claims (20)

1. A waveguide for time-domain integration of THz pulses, comprising two wires extending from an input gap g in to an output gap g out at a tapering angle θ relative to a longitudinal axis, a gap of the waveguide decreasing linearly from the input gap g in to the output gap g out , wherein a size of the output gap is at least one order of magnitude smaller than a central wavelength λ THz in a spectrum of the THz pulses.

2. The waveguide of claim 1 , wherein an input THz pulses have a frequency in a range between 0.1 and 10 THz.

3. The waveguide of claim 1 , wherein an input THz pulse central wavelength λ THz is comprised in a range between 0.03 and 3 mm.

4. The waveguide of claim 1 , wherein the tapering angle is selected in a range between 0° and a maximum tapering angle θmax selected depending on an input THz pulse central wavelength λ THz .

5. The waveguide of claim 1 , wherein the tapering angle is selected in a range between 0° and a maximum tapering angle θmax selected depending on an input THz pulse central wavelength λ THz as follows: θ_max=tan −1 [(1/2*(G THz ))/λ THz )], G THz being a maximum gap variation dependent on the THz pulse spectrum.

6. The waveguide of claim 1 , wherein a size of the output gap is selected in a range between 10 and 30 micrometers and a size of the input gap is selected in a range between 0.1 and 3 millimeters, for a maximum gap variation G THz of λ THz /10 dependent on the THz pulse spectrum.

7. The waveguide of claim 1 , wherein the wires are metallic wires of a radius at least equal to an input THz pulse central wavelength λ THz .

8. The waveguide of claim 1 , wherein the wires are made in one of: copper, gold and aluminum.

9. The waveguide of claim 1 , wherein the wires are supported in tension using polymer holders.

10. A method for time-domain integration of THz pulses, comprising confining input THz pulses in a waveguide comprising two wires separated by a gap linearly decreasing between an input gap and an output gap, wherein a size of the output gap is at most one order of magnitude smaller than a central wavelength λ THz in a spectrum of the input THz pulses.

11. The method of claim 10 , wherein the input THz pulses have a central frequency in a range between 0.1 and 10 THz.

12. The method of claim 10 , wherein an input THz pulses central wavelength λ THz is comprised in a range between 0.03 and 3 mm.

13. The method of claim 10 , wherein the wires extend from the input gap to the output gap at a tapering angle θ relative to a longitudinal axis, the tapering angle being selected in a range between 0° and a maximum tapering angle θmax, the maximum tapering angle θmax being selected depending on an input THz pulses central wavelength λ THz .

14. The method of claim 10 , wherein the wires extend from the input gap to the output gap at a tapering angle θ relative to a longitudinal axis, the tapering angle being selected in a range between 0° and a maximum tapering angle θmax selected depending on an input THz pulses central wavelength λ THz as follows: θ_max=tan −1 [(1/2*(G THz ))/λ THz )], G THz being a maximum gap variation dependent on the THz pulse spectrum.

15. The method of claim 10 , wherein the wires have a radius at least equal to an input THz pulses central wavelength λ THz .

16. The method of claim 10 , wherein the wires are supported in tension using polymer holders.

17. A system for time-domain integration of THz pulses, comprising a waveguide made of two wires separated by a gap linearly decreasing between an input gap and an output gap, wherein a size of the output gap is at most one order of magnitude smaller than a central wavelength λ THz in a spectrum of the THz pulses.

18. The system of claim 17 , wherein the wires have a radius at least equal to an input THz pulses central wavelength λ THz .

19. The system of claim 17 , wherein an input THz pulses have a frequency in a range between 0.1 and 10 THz.

20. The system of claim 17 , wherein the tapering angle is selected in a range between 0° and a maximum tapering angle θmax selected depending on an input THz pulses central wavelength λ THz .

Assignments (1)
NUNC PRO TUNC ASSIGNMENT Recorded Dec 17, 2021
From: TOMASINO, ALESSANDRO; BALISTRERI, GIACOMO; AZANA, JOSE; DONG, JUNLIANG; MORANDOTTI, ROBERTO; JESTIN, YOANN; YURTSEVER, AYCAN
To: INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE
Reel/Frame 058568/0128 →
Continuity (2)
Provisional Application 63078095 · Sep 14, 2020
Related Publication 20220082872A1 · Mar 17, 2022
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