Demonstration of highly efficient forward stimulated Brillouin scattering in partly suspended silicon nanowire racetrack resonators
Demonstration of highly efficient forward stimulated Brillouin scattering in partly suspended silicon nanowire racetrack resonators
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DOI：
10.1063/1.4994023
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发表时间：
2017-07
影响因子：
4
通讯作者：
Ruiwen Zhang;Junqiang Sun;Guodong Chen;M. Cheng;Jialin Jiang
中科院分区：
文献类型：
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作者：
Ruiwen Zhang;Junqiang Sun;Guodong Chen;M. Cheng;Jialin Jiang
我们演示了部分悬浮硅纳米线跑道谐振腔中的前向受激布里渊散射（FSBS）。为了实现纳米级硅芯中的横向声学模式的紧密限制，跑道谐振器由微小柱支撑。在8mW的低功率泵浦下，谐振腔半径为100 μm时，布里渊放大率达到2.25dB。分析了波导宽度和微柱顶部宽度对布里渊频移和布里渊增益的影响。布里渊频移可以方便地通过改变波导宽度来控制。我们提出的方法为集成光子电路中利用FSBS提供了一种替代方案。
We demonstrate the forward stimulated Brillouin scattering (FSBS) in a partly suspended silicon nanowire racetrack resonator. To realize the tight confinement of the transverse acoustic modes in the nanoscale silicon core, the racetrack resonator is supported by the tiny pillar. The Brillouin amplification of 2.25 dB is achieved with the resonator radius of 100 μm under a low-power pump laser of 8 mW. The influences of the waveguide width and the top width of the tiny pillar on the Brillouin frequency shift and Brillouin gain are presented and analyzed. The Brillouin frequency shift is conveniently manipulated by the changes in waveguide widths. Our proposed approach furnishes an alternative towards harnessing FSBS in integrated photonic circuits.