| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2013: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2011: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2010: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
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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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