Abstract
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 ̃105 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 1μm, causing the microresonator to switch from being a band-stop filter to a bandpass filter. Larger bubbles with submicrometer wall thickness were also fabricated.
| Original language | English |
|---|---|
| Pages (from-to) | 2113-2115 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 36 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1 Jun 2011 |
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