Fujiwara Masazumi, Noda Tetsuya, Tanaka Akira, Toubaru Kiyota, Zhao Hong-Quan, Takeuchi Shigeki
Research Institute for Electronic Science, Hokkaido University, Sapporo, Hokkaido, Japan.
Opt Express. 2012 Aug 13;20(17):19545-53. doi: 10.1364/OE.20.019545.
We cooled ultrathin tapered fibers to cryogenic temperatures and controllably coupled them with high-Q microsphere resonators at a wavelength close to the optical transition of diamond nitrogen vacancy centers. The 310-nm-diameter tapered fibers were stably nanopositioned close to the microspheres with a positioning stability of approximately 10 nm over a temperature range of 7-28 K. A cavity-induced phase shift was observed in this temperature range, demonstrating a discrete transition from undercoupling to overcoupling.
我们将超薄锥形光纤冷却至低温，并在接近金刚石氮空位中心光学跃迁的波长下，将它们与高Q值微球谐振器可控地耦合。直径为310纳米的锥形光纤在7至28开尔文的温度范围内，以约10纳米的定位稳定性稳定地纳米定位在微球附近。在该温度范围内观察到了腔诱导相移，证明了从欠耦合到过耦合的离散转变。
