School of Science Department of Physics 54 Development of Monitoring and Controlling Devices for Quantum Simulators Supervisor: JO Gyu Boong / PHYS Student: CHEN Xinpeng / PHYS-IRE Course: UROP 1100, Summer We introduce a relatively new method for producing a flat-top light field to trap the atoms. Compared with the traditional method, which includes a Fourier transformation on the focal plane, this method is not limited by the pixel size gained by holographic imaging and is faster since it doesn’t include a series of Fourier transformations. This article first introduces the background of the spatial light modulator and the underlying principle of the experiment. After that, the setup of the experiment will be discussed, followed by the description of the experiment. Later, we focus on analyzing the pattern captured by the camera. Finally, some remaining challenges are discussed. Development of Monitoring and Controlling Devices for Quantum Simulators Supervisor: JO Gyu Boong / PHYS Student: LI Yunchu / PHYS Course: UROP 4100, Fall External cavity diode lasers, referred as ECDL, are non-monolithic diode lasers where the laser cavity (resonator) is completed with external optical elements. In this report, we will introduce the design of 649nm ECDL, which will be applied in killing atoms in 3P0 orbits (mentioned in UROP3100 Report). This laser is expected to work under -3℃. In details, we provide the working theory, known as Litrrow configuration, the mechanical design, and the testing result. Additional attentions will be paid on design of vacuum chamber and heat dissipation components, which overcoming the technical and environmental issues from traditional ECDL structure under low temperature conditions. High-quality Two-dimensional Heterostructural Device: From Materials Synthesis to Device Fabrication Supervisor: LEI Shiming / PHYS Student: FAN Yeung / PHYS LI Zhuoqun / PHYS Course: UROP 1000, Summer UROP 1000, Summer MnBi₂Te₄ (MBT), as the first intrinsic antiferromagnetic topological insulator discovered, demonstrated great research potential as it can host a variety of quantum effects such as the quantum anomalous Hall effect and the quantum spin Hall effect (Li, et al., 2024). Hence, studies on this material are highly demanded. However, detecting these phenomena require MnBi₂Te₄ devices, which are still challenging to fabricate up to date. In this project, we explored methods to fabricate such devices with higher quality and efficiency utilizing thermoplastics. An improved procedure of fabricating such devices were developed.
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