钙钛矿极化子波导中的有源相位与幅度调制
Active Phase and Amplitude Modulation in Perovskite Polaritonic Waveguides
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中文总结 AI 辅助
本研究在钙钛矿极化子波导中利用电热驱动结构相变实现有源相位和幅度调制，相位调谐效率比硅调制器低一个数量级，为紧凑非线性光子电路提供新途径。
中文摘要 AI 辅助
集成光子技术需要能够在紧凑尺寸和低损耗条件下提供大光学调制的有源材料。激子-极化子的强光学非线性为实现这些要求提供了有希望的途径，然而将其集成到光子电路中仍具挑战性，因为强光-物质相互作用必须与低损耗传输和空间局域控制相结合。在此，我们展示了与电微加热器集成的卤化物钙钛矿极化子波导中的有源相位和幅度调制。局部电热驱动引发钙钛矿中的结构相变，改变激子共振附近的复折射率色散。通过调节传播模式的激子分数，波导因此可以作为相位调制器运行，其调谐效率为0.2 mW mm，比类似几何结构的硅调制器低约一个数量级，或作为强度开关，在20 mW下提供1 dB/um的调制深度。我们的工作确立了相变激子重构作为紧凑极化子电路用于非线性光子应用的途径。
英文摘要
Integrated photonic technologies require active materials capable of providing large optical modulation within compact footprints and low losses. The large optical nonlinearities of exciton-polaritons offer a promising route to meet these requirements, yet their integration into photonic circuits remains challenging because strong light-matter interactions must be combined with low-loss transport and spatially localized control. Here, we demonstrate active phase and amplitude modulation in halide perovskite polaritonic waveguides integrated with electrical microheaters. Local electrothermal actuation drives a structural phase transition in the perovskite, modifying the complex refractive index dispersion near the excitonic resonance. By tuning the excitonic fraction of the propagating mode, the waveguides can therefore operate either as a phase shifter with a tuning efficiency of 0.2 mW mm, approximately one order of magnitude lower than silicon modulators with similar geometries, or as an intensity switch , providing 1 dB/um modulation depth at 20 mW. Our work establishes phase-change excitonic reconfiguration as a route towards compact polariton circuits for nonlinear photonic applications.
发表机构
- Nanyang Technological University（南洋理工大学）
- CNR NANOTEC Institute of Nanotechnology（意大利国家研究委员会纳米技术研究所）
- University of Southampton（南安普顿大学）
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