Sumetsky M
Opt Lett. 2017 Mar 1;42(5):923-926. doi: 10.1364/OL.42.000923.
The theory of slow acoustic modes propagating along the optical fiber and being controlled by the nanoscale variation of the effective fiber radius (analogous to the theory of slow optical whispering gallery modes) is developed. Surprisingly, it is shown that, in addition to acoustic bottle resonators (which are similar to optical bottle resonators), there exist antibottle resonators, the neck-shaped deformations of the fiber that can fully confine acoustic modes. It is also shown that an eigenfrequency of the mechanical vibrations of a silica parabolic bottle resonator can match the separation between the eigenfrequencies of a series of its optical modes, thereby enabling the resonant mechanical excitation of these series. The developed theory paves the groundwork for slow-mode optomechanics in an optical fiber.
本文提出了一种慢声模沿光纤传播并受有效光纤半径纳米级变化控制的理论（类似于慢光学回音壁模理论）。令人惊讶的是，研究表明，除了声瓶谐振器（类似于光学瓶谐振器）之外，还存在反瓶谐振器，即光纤的颈部形状变形，它可以完全限制声模。研究还表明，二氧化硅抛物线形瓶谐振器的机械振动本征频率可以与一系列光学模的本征频率间隔相匹配，从而实现对这些光学模序列的谐振机械激发。所提出的理论为光纤中的慢模光力学奠定了基础。
