fabrication-1-d-photonic-crystal-cavity-on-nanofiber-using

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

We present a protocol for fabricating 1-D Photonic Crystal (PhC) cavities on subwavelength-diameter tapered optical fibers, optical nanofibers, using ...

University of Electro-Communications

We implemented a photonic crystal nanofiber device by reversibly combining an optical nanofiber and a nanofabricated grating. Using the finite-difference time-domain method, we designed the system for minimal optical loss while tailoring the resonant wavelength and bandwidth of the device. Experimentally, we demonstrated that the combined system shows a strong photonic stop band in good agreement with numerical predictions. The resulting device may be used to realize strong light-matter coupling near the nanofiber surface.

Photonic crystal nanofiber using an external grating.

We demonstrate cavity QED conditions in the Purcell regime for single quantum emitters on the surface of an optical nanofiber. The cavity is formed by combining an optical nanofiber and a nanofabricated grating to create a composite photonic crystal cavity. By using this technique, significant enhancement of the spontaneous emission rate into the nanofiber guided modes is observed for single quantum dots. Our results pave the way for enhanced on-fiber light-matter interfaces with clear applications to quantum networks.

Cavity quantum electrodynamics on a nanofiber using a composite photonic crystal cavity.

We demonstrate a method for making precise measurements of the diameter of a tapered optical fiber with a sub-wavelength diameter waist (an optical nanofiber). The essence of the method is to create a composite photonic crystal cavity by mounting a defect-mode grating on an optical nanofiber. The resultant cavity has a resonance wavelength that is sensitive to the nanofiber's diameter, allowing the diameter to be inferred from optical measurements. This method offers a precise, nondestructive, and in situ way to characterize the nanofiber diameter.

Article	Year
Photonic crystal nanofiber using an external grating. Optics letters\| PubMed ID: 23939106	2013
Cavity quantum electrodynamics on a nanofiber using a composite photonic crystal cavity. Physical review letters\| PubMed ID: 25325641	2014
Diameter measurement of optical nanofibers using a composite photonic crystal cavity. Optics letters\| PubMed ID: 26368727	2015

Kohzo Hakuta

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