波导阵列中混合光-物质粒子的布洛赫振荡
Bloch Oscillations of Hybrid Light-Matter Particles in a Waveguide Array
AI总结：
本文在耦合微腔波导阵列中通过设计恒定能量梯度，首次实现并直接观测了激子-极化激元的布洛赫振荡，并用修正Gross-Pitaevskii方程数值模拟验证实验结果，将量子力学基本概念拓展到集成固态器件。
摘要：
布洛赫振荡是量子力学中众所周知的现象，其中晶格中的电子在电场梯度存在时经历振荡运动。在此，我们报告了被称为激子-极化激元的混合光-物质粒子的布洛赫振荡，这些粒子被限制在耦合微腔波导阵列中。为此，我们精心设计了波导的宽度及其相互耦合，使得在与传播的激子-极化激元运动方向垂直的方向上产生恒定的能量梯度。该技术使我们能够在实空间和动量空间中直接观察和研究布洛赫振荡。此外，我们通过基于修正的Gross-Pitaevskii方法的数值模拟支持了我们的实验结果。我们的工作利用光的量子流体，将量子力学的基本概念重要地转移到了集成固态器件中。
英文摘要：
Bloch oscillations are a phenomenon well known from quantum mechanics where electrons in a lattice experience an oscillatory motion in the presence of an electric field gradient. Here, we report on Bloch oscillations of hybrid light-matter particles, called exciton-polaritons, being confined in an array of coupled microcavity waveguides. To this end, we carefully design the waveguides, widths and their mutual couplings such that a constant energy gradient is induced perpendicular to the direction of motion of the propagating exciton-polaritons. This technique allows us to directly observe and study Bloch oscillations in real- and momentum-space. Furthermore, we support our experimental findings by numerical simulations based on a modified Gross-Pitaevskii approach. Our work provides an important transfer of basic concepts of quantum mechanics to integrated solid state devices, using quantum fluids of light.
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