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首页> 外文期刊>Physical review. B, Condensed Matter And Materals Physics >Evidence for terahertz acoustic phonon parametric oscillator based on acousto-optic degenerate four-wave mixing in a silicon doping superlattice
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Evidence for terahertz acoustic phonon parametric oscillator based on acousto-optic degenerate four-wave mixing in a silicon doping superlattice

机译：硅掺杂超晶格中基于声光简并四波混频的太赫兹声子参数振荡器的证据

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摘要

We report evidence for a 1.0-THz self-starting mirrorless acoustic phonon parametric oscillator (MAPPO) produced from acousto-optic phase-conjugate degenerate four-wave (D4WM) mixing in a THz laser-pumped silicon doping superlattice (DSL). The DSL was grown by molecular beam epitaxy on a (100) boron-doped silicon substrate. A superconducting NbTiN subwavelength grating was used to couple the THz laser radiation into the DSL. Superconducting granular aluminum bolometric detection, coupled with Si:B piezophonon spectroscopy, revealed excitation of THz coherent compressional and shear waves, along the < 111 > direction only. The Bragg scattering condition for distributed feedback, and the energy conservation requirement for the D4WM process, were both verified. A THz MAPPO could provide a test bed for studies of nonclassical acoustic phonon fields.
机译：我们报告的证据为在太赫兹激光泵浦硅掺杂超晶格（DSL）中混合声光相位共轭简并四波（D4WM）产生的1.0 THz自启动无镜声子参量振荡器（MAPPO）。 DSL通过分子束外延在（100）掺硼硅衬底上生长。 NbTiN亚波长超导光栅用于将THz激光辐射耦合到DSL中。超导颗粒铝辐射热检测，与Si：B压电声波谱相结合，显示仅沿<111>方向激发了THz相干压缩波和剪切波。验证了分布式反馈的布拉格散射条件以及D4WM过程的节能要求。太赫兹MAPPO可以为非经典声子场的研究提供测试平台。

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