标题： 原子表面散射用于高灵敏度光谱学 显示英文标题

标题： Surface scattering of atoms for high-sensitivity spectroscopy

摘要： 高灵敏度激光光谱学在原子钟、量子计算机和化学传感等应用中是必不可少的。降低原子温度会减少光谱多普勒展宽并增加通过激发激光的传输时间。我们发现，涂有聚二甲基硅氧烷（PDMS）的表面可以通过表面散射将铁原子从约1400 K冷却到室温。显然，一次散射事件就足以使原子与PDMS表面温度达到平衡。此外，我们展示了铁和镱原子在PDMS上的吸附非常低，这种效应在表面温度达到200 K时仍然存在。通过数值模拟，我们证明了表面散射在制造室温下具有增强通量和相比没有表面散射情况下的更小速度的准直原子源方面的潜力。 显示英文摘要

摘要： High-sensitivity laser spectroscopy is integral to applications like atomic clocks, quantum computers, and chemical sensing. Lowering atomic temperature decreases spectral Doppler broadening and increases transit time across the excitation laser. We find that a polydimethylsiloxane (PDMS) coated surface can cool iron atoms from ~1400 K to room temperature by surface scattering. It is also apparent that a single scattering event is enough for atoms to equilibrate with the PDMS surface temperature. Further, we show the very low adsorption of iron and ytterbium atoms on PDMS, an effect that persists to surface temperatures of 200 K. Through numerical simulation, we demonstrate the potential use of surface scattering in making a room temperature source of collimated atoms with enhanced flux and reduced velocity compared to that without surface scattering.