245 citations · 376 across the 4 of their papers we have counts for
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Observation of an Inner-Shell Orbital Clock Transition in Neutral Ytterbium Atoms
Taiki Ishiyama, Koki Ono, Tetsushi Takano +2
We observe a weakly allowed optical transition of atomic ytterbium from the ground state to the metastable state for all five bosonic and two fermionic iso…
Gallium-nitride-based interference-filter-stabilized external cavity diode laser with a surface-activated-bonded output coupler
Hisashi Ogawa, Tatsuya Kemmochi, Tetsushi Takano
We report on an interference-filter-stabilized external cavity diode laser using a gallium-nitride-based violet laser diode. Surface-activated-bonded glass substrates were employed…
Real-time geopotentiometry with synchronously linked optical lattice clocks
Tetsushi Takano, Masao Takamoto, Ichiro Ushijima +7
According to the Einstein's theory of relativity, the passage of time changes in a gravitational field. On earth, raising a clock by one centimetre increases its tick rate by 1.1 p…
Lamb-Dicke spectroscopy of atoms in a hollow-core photonic crystal fibre
Shoichi Okaba, Tetsushi Takano, Fetah Benabid +6
Unlike photons, which are conveniently handled by mirrors and optical fibres without loss of coherence, atoms lose their coherence via atom-atom and atom-wall interactions. This de…