Publications

@article{Ikuta2019,

title = {Frequency-Multiplexed Photon Pairs Over 1000 Modes from a Quadratic Nonlinear Optical Waveguide Resonator with a Singly Resonant Configuration},

author = {Rikizo Ikuta and Ryoya Tani and Masahiro Ishizaki and Shigehito Miki and Masahiro Yabuno and Hirotaka Terai and Nobuyuki Imoto and Takashi Yamamoto},

url = {https://link.aps.org/doi/10.1103/PhysRevLett.123.193603},

doi = {10.1103/PhysRevLett.123.193603},

year  = {2019},

date = {2019-11-08},

urldate = {2019-11-08},

journal = {Phys. Rev. Lett.},

volume = {123},

pages = {193603},

organization = {arXiv},

abstract = {We demonstrate a frequency multiplexed photon pair generation based on a quadratic nonlinear optical waveguide inside a cavity which confines only signal photons without confining idler photons and the pump light. We monolithically constructed the photon pair generator by a periodically poled lithium niobate (PPLN) waveguide with a high reflective coating for the signal photons around 1600 nm and with antireflective coatings for the idler photons around 1520 nm and the pump light at 780 nm at the end faces of the PPLN waveguide. We observed a comblike photon pair generation with a mode spacing of the free spectral range of the cavity. Unlike the conventional multiple resonant photon pair generation experiments, the photon pair generation was incessant within a range of 80 nm without missing teeth due to a mismatch of the energy conservation and the cavity resonance condition of the photons, resulting in over 1000-mode frequency multiplexed photon pairs in this range.},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}

@article{Ikuta2018b,

title = {Frequency comb generation in a quadratic nonlinear waveguide resonator},

author = {Rikizo Ikuta and Motoki Asano and Ryoya Tani and Takashi Yamamoto and Nobuyuki Imoto},

url = {https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-12-15551},

doi = {10.1364/OE.26.015551},

year  = {2018},

date = {2018-06-06},

journal = {Optics Express},

volume = {26},

number = {12},

pages = {15551--15558},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}

@article{Ikuta2018bc,

title = {Frequency comb generation in a quadratic nonlinear waveguide resonator},

author = {Rikizo Ikuta and Motoki Asano and Ryoya Tani and Takashi Yamamoto and Nobuyuki Imoto},

url = {https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-12-15551},

doi = {10.1364/OE.26.015551},

year  = {2018},

date = {2018-06-06},

journal = {Optics Express},

volume = {26},

number = {12},

pages = {15551--15558},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}

@article{Asano2018,

title = {An opto-electro-mechanical system based on evanescently-coupled optical microbottle and electromechanical resonator},

author = {Motoki Asano and Ryuichi Ohta and Takashi Yamamoto and Hajime Okamoto and Hiroshi Yamaguchi},

url = {https://doi.org/10.1063/1.5022115},

doi = {10.1063/1.5022115},

year  = {2018},

date = {2018-05-15},

journal = {Appl. Phys. Lett.},

volume = {112},

pages = {201103},

keywords = {optical cavity, optomechanics},

pubstate = {published},

tppubtype = {article}

}

@article{Asano2018b,

title = {An opto-electro-mechanical system based on evanescently-coupled optical microbottle and electromechanical resonator},

author = {Motoki Asano and Ryuichi Ohta and Takashi Yamamoto and Hajime Okamoto and Hiroshi Yamaguchi},

url = {https://doi.org/10.1063/1.5022115},

doi = {10.1063/1.5022115},

year  = {2018},

date = {2018-05-15},

journal = {Appl. Phys. Lett.},

volume = {112},

pages = {201103},

keywords = {optical cavity, optomechanics},

pubstate = {published},

tppubtype = {article}

}

@article{Asano:16b,

title = {Visible light emission from a silica microbottle resonator by second- and third-harmonic generation},

author = {Motoki Asano and Shoichi Komori and Rikizo Ikuta and Nobuyuki Imoto and \c{S} and Takashi Yamamoto},

url = {http://ol.osa.org/abstract.cfm?URI=ol-41-24-5793},

doi = {10.1364/OL.41.005793},

year  = {2016},

date = {2016-12-01},

journal = {Opt. Lett.},

volume = {41},

number = {24},

pages = {5793--5796},

publisher = {OSA},

abstract = {We report the first observation of nonlinear harmonic generation and sum frequency generation (SFG) coupled with stimulated Raman scattering (SRS) via the second-order (\χ(2)) and the third-order (\χ(3)) nonlinearities in a silica microbottle resonator. The visible light emission due to third-harmonic generation (THG) was observed in both the output of a tapered fiber and the optical microscope images, which can be used to identify the axial mode profiles. SFG enabled by three- and four-wave mixing processes between the pump light and the light generated via SRS was also observed. Second-harmonic generation (SHG) and the SFG are enabled by \χ(2) induced in silica by surface effects and multipole excitations.},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}

@article{Asano:16bc,

title = {Visible light emission from a silica microbottle resonator by second- and third-harmonic generation},

author = {Motoki Asano and Shoichi Komori and Rikizo Ikuta and Nobuyuki Imoto and \c{S} and Takashi Yamamoto},

url = {http://ol.osa.org/abstract.cfm?URI=ol-41-24-5793},

doi = {10.1364/OL.41.005793},

year  = {2016},

date = {2016-12-01},

journal = {Opt. Lett.},

volume = {41},

number = {24},

pages = {5793--5796},

publisher = {OSA},

abstract = {We report the first observation of nonlinear harmonic generation and sum frequency generation (SFG) coupled with stimulated Raman scattering (SRS) via the second-order (\χ(2)) and the third-order (\χ(3)) nonlinearities in a silica microbottle resonator. The visible light emission due to third-harmonic generation (THG) was observed in both the output of a tapered fiber and the optical microscope images, which can be used to identify the axial mode profiles. SFG enabled by three- and four-wave mixing processes between the pump light and the light generated via SRS was also observed. Second-harmonic generation (SHG) and the SFG are enabled by \χ(2) induced in silica by surface effects and multipole excitations.},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}

@article{asano2016anomalous,

title = {Anomalous time delays and quantum weak measurements in optical microresonators},

author = {Motoki Asano and Konstantin Y Bliokh and Yury P Bliokh and Abraham G Kofman and Rikizo Ikuta and Takashi Yamamoto and Yuri S Kivshar and Lan Yang and Nobuyuki Imoto and \c{S} and Franco Nori},

doi = {10.1038/ncomms13488},

year  = {2016},

date = {2016-11-01},

journal = {Nature communications},

volume = {7},

pages = {13488},

publisher = {Nature Publishing Group},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}

@article{asano2016anomalousb,

title = {Anomalous time delays and quantum weak measurements in optical microresonators},

author = {Motoki Asano and Konstantin Y Bliokh and Yury P Bliokh and Abraham G Kofman and Rikizo Ikuta and Takashi Yamamoto and Yuri S Kivshar and Lan Yang and Nobuyuki Imoto and \c{S} and Franco Nori},

doi = {10.1038/ncomms13488},

year  = {2016},

date = {2016-11-01},

journal = {Nature communications},

volume = {7},

pages = {13488},

publisher = {Nature Publishing Group},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}

@article{doi:10.1002/lpor.201500243,

title = {Observation of optomechanical coupling in a microbottle resonator},

author = {Motoki Asano and Yuki Takeuchi and Weijian Chen and \c{S} and Rikizo Ikuta and Nobuyuki Imoto and Lan Yang and Takashi Yamamoto},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/lpor.201500243},

doi = {10.1002/lpor.201500243},

year  = {2016},

date = {2016-07-01},

journal = {Laser \& Photonics Reviews},

volume = {10},

number = {4},

pages = {603-611},

abstract = {Abstract In this work, we report optomechanical coupling, resolved sidebands and phonon lasing in a solid‐core microbottle resonator fabricated on a single mode optical fiber. Mechanical modes with quality factors (Qm) as high as 1.57 × 104 and 1.45 × 104 were observed, respectively, at the mechanical frequencies and . The maximum  Hz is close to the theoretical lower bound of 6 × 1012 Hz needed to overcome thermal decoherence for resolved‐sideband cooling of mechanical motion at room temperature, suggesting microbottle resonators as a possible platform for this endeavor. In addition to optomechanical effects, scatter‐induced mode splitting and ringing phenomena, which are typical for high‐quality optical resonances, were also observed in a microbottle resonator.},

keywords = {optical cavity, optomechanics},

pubstate = {published},

tppubtype = {article}

}

@article{doi:10.1002/lpor.201500243b,

title = {Observation of optomechanical coupling in a microbottle resonator},

author = {Motoki Asano and Yuki Takeuchi and Weijian Chen and \c{S} and Rikizo Ikuta and Nobuyuki Imoto and Lan Yang and Takashi Yamamoto},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/lpor.201500243},

doi = {10.1002/lpor.201500243},

year  = {2016},

date = {2016-07-01},

journal = {Laser \& Photonics Reviews},

volume = {10},

number = {4},

pages = {603-611},

abstract = {Abstract In this work, we report optomechanical coupling, resolved sidebands and phonon lasing in a solid‐core microbottle resonator fabricated on a single mode optical fiber. Mechanical modes with quality factors (Qm) as high as 1.57 × 104 and 1.45 × 104 were observed, respectively, at the mechanical frequencies and . The maximum  Hz is close to the theoretical lower bound of 6 × 1012 Hz needed to overcome thermal decoherence for resolved‐sideband cooling of mechanical motion at room temperature, suggesting microbottle resonators as a possible platform for this endeavor. In addition to optomechanical effects, scatter‐induced mode splitting and ringing phenomena, which are typical for high‐quality optical resonances, were also observed in a microbottle resonator.},

keywords = {optical cavity, optomechanics},

pubstate = {published},

tppubtype = {article}

}

@article{Asano:16b,

title = {Stimulated Brillouin scattering and Brillouin-coupled four-wave-mixing in a silica microbottle resonator},

author = {Motoki Asano and Yuki Takeuchi and \c{S} and Rikizo Ikuta and Lan Yang and Nobuyuki Imoto and Takashi Yamamoto},

url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-24-11-12082},

doi = {10.1364/OE.24.012082},

year  = {2016},

date = {2016-05-01},

journal = {Opt. Express},

volume = {24},

number = {11},

pages = {12082--12092},

publisher = {OSA},

abstract = {We report the first observation of stimulated Brillouin scattering (SBS) with Brillouin lasing, and Brillouin-coupled four-wave-mixing (FWM) in an ultra-high-Q silica microbottle resonator. The Brillouin lasing was observed at the frequency of \ΩB $=$ 2\π \× 10.4 GHz with a threshold power of 0.45 mW. Coupling between Brillouin and FWM was observed in both backward and forward scattering directions with separations of 2\ΩB. At a pump power of 10 mW, FWM spacing reached to 7th and 9th order anti-Stokes and Stokes, respectively.},

keywords = {optical cavity, optomechanics},

pubstate = {published},

tppubtype = {article}

}

@article{Asano:16d,

title = {Stimulated Brillouin scattering and Brillouin-coupled four-wave-mixing in a silica microbottle resonator},

author = {Motoki Asano and Yuki Takeuchi and \c{S} and Rikizo Ikuta and Lan Yang and Nobuyuki Imoto and Takashi Yamamoto},

url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-24-11-12082},

doi = {10.1364/OE.24.012082},

year  = {2016},

date = {2016-05-01},

journal = {Opt. Express},

volume = {24},

number = {11},

pages = {12082--12092},

publisher = {OSA},

abstract = {We report the first observation of stimulated Brillouin scattering (SBS) with Brillouin lasing, and Brillouin-coupled four-wave-mixing (FWM) in an ultra-high-Q silica microbottle resonator. The Brillouin lasing was observed at the frequency of \ΩB $=$ 2\π \× 10.4 GHz with a threshold power of 0.45 mW. Coupling between Brillouin and FWM was observed in both backward and forward scattering directions with separations of 2\ΩB. At a pump power of 10 mW, FWM spacing reached to 7th and 9th order anti-Stokes and Stokes, respectively.},

keywords = {optical cavity, optomechanics},

pubstate = {published},

tppubtype = {article}

}

@article{doi:10.1063/1.4948922,

title = {Controlling slow and fast light and dynamic pulse-splitting with tunable optical gain in a whispering-gallery-mode microcavity},

author = {Motoki Asano and \c{S} and Weijian Chen and Rikizo Ikuta and Lan Yang and Nobuyuki Imoto and Takashi Yamamoto},

url = {https://doi.org/10.1063/1.4948922},

doi = {10.1063/1.4948922},

year  = {2016},

date = {2016-01-01},

journal = {Applied Physics Letters},

volume = {108},

number = {18},

pages = {181105},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}

@article{doi:10.1063/1.4948922b,

title = {Controlling slow and fast light and dynamic pulse-splitting with tunable optical gain in a whispering-gallery-mode microcavity},

author = {Motoki Asano and \c{S} and Weijian Chen and Rikizo Ikuta and Lan Yang and Nobuyuki Imoto and Takashi Yamamoto},

url = {https://doi.org/10.1063/1.4948922},

doi = {10.1063/1.4948922},

year  = {2016},

date = {2016-01-01},

journal = {Applied Physics Letters},

volume = {108},

number = {18},

pages = {181105},

keywords = {optical cavity},

pubstate = {published},

tppubtype = {article}

}