2013 Fiscal Year Final Research Report
A study on ultra broad band terahertz wave generation using nonlinear optical waveguide
| Project/Area Number |
22360026
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
KAWASE Kodo 名古屋大学, エコトピア科学研究所, 教授 (00296013)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | 非線形光学 / テラヘルツ |
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| Research Abstract |
We have studied the combination of state of the art techniques with the aim to overcome limitation.For THz emission, generation from a LiNbO3 crystal in a ridge-type waveguide structure (width 5 um; thickness 3.8 um; length 10 mm) using 1.56 um wavelength, 17 fs pump pulses was demonstrated. The THz radiation was coupled out by a spherical Si prism enhancing the THz radiation from the pump beam. To overcome this limitation, a reverse geometry, so that the optical and the THz beam are both incident onto the contact side of the antenna, can be used. Yet, the challenge is to focus the THz wave to the PCA. To solve this problem, we use a metal V groove structure (gap size about 200 um) to super focus the beam beyond the diffraction limit. This focusing technique has been shown to enhance the intensity of the THz detection in a THz-TDS system based on chaotic oscillation in a laser.
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[Presentation] Nonlinear optical THz generation and applications2012
Author(s)
K. Kawase, S. Hayashi, H. Minamide
Organizer
2-nd International Conference "Terahertz and Microwave radiation : Generation, Detection and Applications" (TERA-2012)
Place of Presentation
p.9, Lomonosov Moscow State University, Russia
Year and Date
20120620-22
Invited
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