Brunswick L A F, Hallacy L, Dost R, Clarke E, Skolnick M S, Wilson L R
School of Mathematical and Physical Sciences, University of Sheffield, Sheffield S3 7RH, U.K.
School of Electrical and Electronic Engineering, University of Sheffield, Sheffield S3 7HQ, U.K.
ACS Photonics. 2025 Jul 17;12(8):4315-4322. doi: 10.1021/acsphotonics.5c00606. eCollection 2025 Aug 20.
On-chip microcavities with embedded quantum emitters provide an excellent platform for high-performance quantum technologies. A major difficulty for such devices is overcoming the detrimental effects of fluctuations in the device dimensions caused by the limitations of the fabrication processes. We present a system based on a 1D photonic-crystal cavity with an embedded quantum dot. A microelectromechanical cantilever is used to tune the cavity mode wavelength via index modulation and the quantum-confined Stark effect is used to tune the quantum dot emission energy, thus mitigating the effect of fabrication imperfections. To demonstrate the operation of the device, a maximum voltage-controllable cavity tuning range of Δλ = 1.8 nm is observed. This signal is measured at the end of a bus waveguide which side-couples to the cavity, enabling the coupling of multiple cavities to a common waveguide, a key requirement for scale-up in these systems. Additionally, a quantum dot is tuned into resonance with the cavity mode, exhibiting an enhanced emission rate with a detector-resolution limited Purcell factor of = 3.5.
带有嵌入式量子发射器的片上微腔为高性能量子技术提供了一个出色的平台。此类器件面临的一个主要困难是克服由制造工艺限制导致的器件尺寸波动的有害影响。我们展示了一种基于带有嵌入式量子点的一维光子晶体腔的系统。一个微机电悬臂用于通过折射率调制来调谐腔模波长，并且利用量子限制斯塔克效应来调谐量子点发射能量，从而减轻制造缺陷的影响。为了演示该器件的运行，观察到最大电压可控腔调谐范围为Δλ = 1.8 nm。该信号在与腔侧面耦合的总线波导末端进行测量，这使得多个腔能够耦合到一个公共波导，这是这些系统扩大规模的关键要求。此外，一个量子点被调谐到与腔模共振，在探测器分辨率限制的珀塞尔因子为 = 3.5的情况下表现出增强的发射率。
