Physics Department, University College Cork, Cork, Ireland.
Opt Lett. 2011 Jun 1;36(11):2113-5. doi: 10.1364/OL.36.002113.
A single-input whispering gallery optical microbubble resonator is presented. Spherical microbubbles with diameters less than 100 μm, micrometer-sized wall thicknesses, and a single opening or input were fabricated by heating the tapered tip of a pressurized glass capillary using a CO(2) laser. Optical whispering gallery modes with Q factors of ∼10(5) were obtained. The bubbles were filled with water and mode shifts of ∼20 GHz were observed. Fano-type resonances were detected when the coupling optical fiber diameter was less than 1 μm, causing the microresonator to switch from being a band-stop filter to a bandpass filter. Larger bubbles with submicrometer wall thickness were also fabricated.
提出了一种单输入声回廊微泡谐振器。通过使用 CO2 激光加热加压玻璃毛细管的锥形尖端，制造出直径小于 100μm、微米级壁厚和单个开口或输入的球形微泡。获得了 Q 因子约为 10(5)的光学 whispering 回廊模式。当耦合光纤直径小于 1μm 时，微谐振器中观察到约 20GHz 的模式移动，微泡被填充入水后发生了模式移动。当耦合光纤直径小于 1μm 时，检测到了类 Fano 共振，这导致微谐振器从带阻滤波器切换为带通滤波器。还制造了具有亚微米级壁厚的较大微泡。
