论文标题
用于二维偶性激子的微观晶格
A Microscopic Lattice for Two-dimensional Dipolar Excitons
论文作者
论文摘要
我们报告了限制在GAAS双重量子井中的偶极激发子的二维人造晶格。在探索每个晶格填充物的大填充物的状态，我们验证了晶格深度是否与激子的折叠式偶极相互作用竞争，以控制晶格电位中的定位程度。此外，我们表明偶极激子辐射狭窄的波段光致发光，在局部和分离式化方案中，光谱宽度为340 mk的几百个微EV。这使我们的设备适合于周期性潜力探索偶极激子准敏。
We report a two-dimensional artificial lattice for dipolar excitons confined in a GaAs double quantum well. Exploring the regime of large fillings per lattice site, we verify that the lattice depth competes with the magnitude of excitons repulsive dipolar interactions to control the degree of localisation in the lattice potential. Moreover, we show that dipolar excitons radiate a narrow-band photoluminescence, with a spectral width of a few hundreds of micro-eV at 340 mK, in both localised and delocalised regimes. This makes our device suitable for explorations of dipolar excitons quasi-condensation in a periodic potential.
