Glebov Nikita V, Masharin Mikhail A, Yulin Alexei, Mikhin Alexey, Miah Md Rumon, Demir Hilmi Volkan, Krizhanovskii Dmitry N, Kravtsov Vasily, Samusev Anton K, Makarov Sergey V
School of Physics and Engineering, ITMO University, St. Petersburg 197101, Russia.
Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland.
ACS Nano. 2025 Apr 15;19(14):14097-14106. doi: 10.1021/acsnano.4c18847. Epub 2025 Apr 1.
Optical nonlinearities are crucial for advanced photonic technologies since they allow photons to be managed by photons. Exciton-polaritons resulting from strong light-matter coupling are hybrid in nature: they combine the small mass and high coherence of photons with strong nonlinearity enabled by excitons, making them ideal for ultrafast all-optical manipulations. Among the most prospective polaritonic materials are halide perovskites since they require neither cryogenic temperatures nor expensive fabrication techniques. Here, we study strikingly nonlinear self-action of ultrashort polaritonic pulses propagating in planar MAPbBr perovskite slab waveguides. Tuning the input pulse energy and central frequency, we experimentally observe various scenarios of its nonlinear evolution in the spectral domain, which include peak shifts, narrowing, or splitting driven by self-phase modulation, group velocity dispersion, and self-steepening. The theoretical model provides complementary temporal traces of pulse propagation and reveals the transition from the birth of a doublet of optical solitons to the formation of a shock wave, both supported by the system. Our results presented here represent an important step in ultrafast nonlinear on-chip polaritonics in perovskite-based systems.
光学非线性对于先进光子技术至关重要，因为它们使光子能够由光子来操控。强光与物质耦合产生的激子极化激元本质上是混合的：它们将光子的小质量和高相干性与激子所赋予的强非线性结合起来，使其成为超快全光操控的理想选择。卤化物钙钛矿是最具前景的极化激元材料之一，因为它们既不需要低温温度，也不需要昂贵的制造技术。在此，我们研究了在平面MAPbBr钙钛矿平板波导中传播的超短极化激元脉冲显著的非线性自作用。通过调整输入脉冲能量和中心频率，我们在实验中观察到其在光谱域非线性演化的各种情况，包括由自相位调制、群速度色散和自陡峭驱动的峰值移动、变窄或分裂。理论模型提供了脉冲传播的互补时间轨迹，并揭示了从光学孤子对的产生到冲击波形成的转变，这两者都得到了该系统的支持。我们在此展示的结果代表了基于钙钛矿的系统中超快非线性片上极化激元学的重要一步。
