| Budget Amount *help |
¥24,960,000 (Direct Cost: ¥19,200,000、Indirect Cost: ¥5,760,000)
Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
Fiscal Year 2012: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Outline of Final Research Achievements |
An optical spring can be formed via radiation pressure by detuning a distance of two test masses in a gravitational-wave detector from a integer multiple of the laser wavelength. The susceptibility of the detector to gravitational waves is enhanced at the resonant frequency of the optical spring. We propose to use a non-linear crystal inside the signal-recycling cavity to increase the resonant frequency so that one can expect to observe gravitational waves from, for example, a merger of binary neutron stars.
We constructed a prototype interferometer at Tokyo Tech and succeeded in operating a signal-recycled Michelson interferometer with a non-linear crystal inside the recycling cavity. We propose this technique to a German detector and the success of our experiment is an important milestone.
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