论文标题
集成的光学涡流微磅
Integrated Optical Vortex Microcomb
论文作者
论文摘要
与无限尺寸的物理自由度的探索，例如轨道角动量和光的频率，已深刻地重塑了现代光学器件的景观，并具有代表性的光子功能设备，包括光涡流发射器和频率梳子。在纳米光子学中，耳语画廊模式微孔子自然支持光的光动量，并已被证明是单色光学涡旋的芯片发射器。另一方面，耳语画廊模式微孔子可以用作高效的非线性光学平台，用于在不同频率（即微核心）下产生光。在这里，我们通过在III-V集成的非线性微孔子上演示光学涡流梳来将光学涡流和微量磁体隔开。角度透明的非线性微孔同时发出的时空灯弹簧由50个轨道角动量模式组成，每个弹簧均与生成的微重物的频率分量（纵向窃窃图库模式）组成。我们通过仔细引入与时空光弹簧的特定模式相关关系，进一步通过实验性地产生具有时变轨道角动量的光脉冲。这项工作可能会立即促进综合非线性/量子光子学的发展，以探索基本的光学物理和推进光子量子技术。
The explorations of physical degrees of freedom with infinite dimensionalities, such as orbital angular momentum and frequency of light, have profoundly reshaped the landscape of modern optics with representative photonic functional devices including optical vortex emitters and frequency combs. In nanophotonics, whispering gallery mode microresonators naturally support orbital angular momentum of light and have been demonstrated as on-chip emitters of monochromatic optical vortices. On the other hand, whispering gallery mode microresonators serve as a highly efficient nonlinear optical platform for producing light at different frequencies - i.e., microcombs. Here, we interlace the optical vortices and microcombs by demonstrating an optical vortex comb on an III-V integrated nonlinear microresonator. The angular-grating-dressed nonlinear microring simultaneously emits spatiotemporal light springs consisting of 50 orbital angular momentum modes that are each spectrally addressed to the frequency components (longitudinal whispering gallery modes) of the generated microcomb. We further experimentally generate optical pulses with time-varying orbital angular momenta by carefully introducing a specific intermodal phase relation to spatiotemporal light springs. This work may immediately boost the development of integrated nonlinear/quantum photonics for exploring fundamental optical physics and advancing photonic quantum technology.
