Ilchenko V S, Gorodetsky M L, Yao X S, Maleki L
Opt Lett. 2001 Mar 1;26(5):256-8. doi: 10.1364/ol.26.000256.
We demonstrate a 165-mu;m oblate spheroidal microcavity with a free spectral range of 383.7 GHz (3.06 nm), a resonance bandwidth of 23 MHz (quality factor Q approximately 10(7)) at 1550 nm, and finesse F>/=10(4) . The highly oblate spheroidal dielectric microcavity combines a very high Q factor, typical of microspheres, with a vastly reduced number of excited whispering-gallery modes (by 2 orders of magnitude). The very large free spectral range in this novel microcavity-a few hundred gigahertz instead of a few gigahertz as in typical microspheres-is desirable for applications in spectral analysis, narrow-linewidth optical and rf oscillators, and cavity QED.
我们展示了一个165微米的扁球形微腔，其自由光谱范围为383.7吉赫兹（3.06纳米），在1550纳米处的共振带宽为23兆赫兹（品质因数Q约为10^7），精细度F≥10^4。这种高度扁球形的介质微腔结合了微球典型的非常高的品质因数，同时极大地减少了激发的回音壁模式数量（减少了2个数量级）。这种新型微腔中非常大的自由光谱范围——几百吉赫兹，而不是典型微球中的几吉赫兹——对于光谱分析、窄线宽光学和射频振荡器以及腔量子电动力学应用来说是很理想的。
