| Budget Amount *help |
¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Fiscal Year 2013: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
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| Research Abstract |
Nuclear spin of rare-earth (RE) ion doped in an inorganic crystal is a solid-state system useful for processing quantum information. In order to utilize RE ions to build an integrated system of an individual spin qubits, the nuclear spins must be individually detected and controlled. However, only a few experiments were successful in resolving nuclear spin states of single RE ion in solid. The major obstacles in photo-luminescence detection of a single ion with a microscopic setup are weak emission of the ion and background emission from the whole crystal. One of the solutions is to use a crystal smaller than the focal volume. Here we took a different approach to develop a single-component aspheric reflecting objective. Owing to a larger solid-angle of a smaller focal volume, the SN ratio improved to a single-ion level.
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