论文标题
Wurtzite量子线具有很强的空间限制：单线光谱中的极化各向异性
Wurtzite quantum wires with strong spatial confinement: polarization anisotropies in single wire spectroscopy
论文作者
论文摘要
我们报告了一维量子限制中的GAAS/藻类纳米线。在20-40 \，NM之间的超薄Wurtzite Gaas核心诱导了几十MEV的大量限制能，从而使我们能够在微观发光光谱中最多可解决四种良好的分离良好分离的亚带激励。我们详细的实验和理论极化分解的研究揭示了这些过渡的直径依赖性各向异性：我们证明，检测到的光致发光的极化受Wurtzite 1D量子量子带的对称性，一方面是一方面，但也由附近的几条材料构成了其他物质的材料。后一种效应导致薄电介质电线中垂直极化光的强大衰减，使藻类壳的厚度成为观察到的极化行为的重要因素。包括与纯wurtzite gaas量子线的基于K.P基于K.P的模拟极化分辨光谱的介电不匹配，我们发现实验和理论之间有着极好的一致性。
We report GaAs/AlGaAs nanowires in the one-dimensional (1D) quantum limit. The ultrathin wurtzite GaAs cores between 20-40\,nm induce large confinement energies of several tens of meV, allowing us to experimentally resolve up to four well separated subband excitations in microphotoluminescence spectroscopy. Our detailed experimental and theoretical polarization-resolved study reveals a strong diameter-dependent anisotropy of these transitions: We demonstrate that the polarization of the detected photoluminescence is governed by the symmetry of the wurtzite 1D quantum wire subbands on the one hand, but also by the dielectric mismatch of the wires with the surrounding material on the other hand. The latter effect leads to a strong attenuation of perpendicularly polarized light in thin dielectric wires, making the thickness of the AlGaAs shell an important factor in the observed polarization behavior. Including the dielectric mismatch to our k.p-based simulated polarization-resolved spectra of purely wurtzite GaAs quantum wires, we find an excellent agreement between experiment and theory.
