High-resolution imaging of Rydberg atoms in optical lattices using an aspheric-lens objective in vacuum

Shen, Chuyang; Chen, Cheng; Wu, Xiaoling; Dong, Shikui; Cui, Yue; You, Li; Tey, Meng Khoon

doi:10.1063/5.0006026

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…The mixture is then loaded into an optical dipole trap (ODT) formed by a 1064-nm light beam and transferred to the desired initial states 85 Rb 5S 1/2 , F = 3, m F = −3 and 87 Rb 5S 1/2 , F = 2, m F = −2 via microwave driven adiabatic passages. Subsequently, the ultracold mixture is transported to a science chamber 21 cm away from the MOT chamber and loaded into a 1D optical lattice [37]. At this stage, we have typically 2.2 × 10 5 85 Rb atoms and 7.1 × 10 5 87 Rb atoms at a temperature of ∼10 µK.…”

Section: Methodsmentioning

confidence: 99%

Two-Color Optical Nonlinearity in an Ultracold Rydberg Atom Gas Mixture

Chen,

Yang,

et al. 2021

Preprint

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We report the experimental observation of strong two-color optical nonlinearity in an ultracold gas of 85 Rb-87 Rb atom mixture. By simultaneously coupling two probe transitions of 85 Rb and 87 Rb atoms to Rydberg states in electromagnetically induced transparency (EIT) configurations, we observe significant suppression of the transparency resonance for one probe field when the second probe field is detuned at ∼ 1 GHz and hitting the EIT resonance of the other isotope. Such a crossabsorption modulation to the beam propagation dynamics can be described by two coupled nonlinear wave equations we develope. We further demonstrate that the two-color optical nonlinearity can be tuned by varying the density ratio of different atomic isotopes, which highlights its potential for exploring strongly interacting multi-component fluids of light.

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Section: Methodsmentioning

confidence: 99%

Two-Color Optical Nonlinearity in an Ultracold Rydberg Atom Gas Mixture

Chen,

Yang,

et al. 2021

Preprint

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“…A first lens inside vacuum can reduce the marginal ray angles and hence aberrations by the following window. Imaging systems of this type have been demonstrated with moderate NAs around 0.5 [87][88][89]. Their disadvantage is that the relative alignment of in-and ex-vacuum components is absolutely crucial and that great care must be taken to prevent mechanical vibrations or long-term drifts.…”

Section: Initial Options and Considerationsmentioning

confidence: 99%

A ship-in-a-bottle quantum gas microscope setup for magnetic mixtures

Sohmen,

Mark,

Greiner

et al. 2023

SciPost Phys.

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Quantum gas microscopes are versatile and powerful tools for fundamental science as well as promising candidates for enticing applications such as in quantum simulation or quantum computation. Here we present a quantum gas microscopy setup for experiments with highly magnetic atoms of the lanthanoid elements erbium and dysprosium. Our setup features a non-magnetic, non-conducting, large-working-distance, high-numerical-aperture, in-vacuum microscope objective, mounted inside a glue-free quartz glass cell. The quartz glass cell is enclosed by a compact multi-shell ferromagnetic shield that passively suppresses external magnetic field noise by a factor of more than a thousand. Our setup will enable direct manipulation and probing of the rich quantum many-body physics of dipolar atoms in optical lattices, and bears the potential to put exciting theory proposals - including exotic magnetic phases and quantum phase transitions - to an experimental test.

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“…32 1000 [23] 18.9 1000 [24] 21.4 1000 [25] 14.9 1000 [28] 摄物镜. 与之前的设计 [21][22][23][24][25][26][27][28] 相比, 该成像系统在保持比较大的倍率和视场(field of view, FOV)的同时, 缩短了原子与像平面之间的距离, 并可以在更大的真空窗厚度范围内使用. 显微物镜的NA为 0.47, 工作距离(working distance, WD)为32 mm.…”

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Design of compact high resolution imaging system for cold atom experiments

Shen,

Cheng,

Xia

2024

Acta Phys. Sin.

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In cold atom experiments, high resolution imaging systems have been used to extract in-situ density information when studying quantum gases, which is one of the hot topics in this field. Such a system is usually called 'quantum-gas microscope'. To achieve a long working distance and large magnification, high resolution imaging of cold atoms through a vacuum window typically demands a long distance between the atoms and the camera. However, implementing a long imaging system can be difficult due to the space constraints posed by a large number of nearby optical elements, which is a common situation in cold atom experiments. Here we present an imaging system that enables achieving a short distance between the atoms and the image plane with diffraction-limited 1 μm resolution and 50 magnification. The telephoto lens design is adopted to reduce the back focal length and enhance the pointing stability of the imaging lens. The system is optimized at an operating wavelength of 767 nm and corrects aberrations induced by a 5 mm thick silica vacuum window. At a working distance of 32 mm, a diffraction-limited field of view of 408 μm is obtained. The simulation shows that by changing the air spaces between lenses, our design operates across a wide range of window thicknesses (0-15 mm), which makes it robust to apply in typical labs. This compact imaging system is made from commercial on-shelf Φ2" singlets and consists of two components:a microscope objective with a numerical aperture of 0.47 and a telephoto objective with a long effective focal length of 1826 mm. Both are infinity-corrected, allowing the distance between them to be adjusted to insert optical elements for irradiating atoms with laser beams of different wavelengths without impairing the imaging resolution. Taking the manufacturing and assembling tolerances into consideration, the Monte Carlo analyses show that more than 95% of the random samples are diffraction-limited within the field of view. This high success rate ensures that the two objectives can be easily implemented in the experiment. Together with its performance with other wavelengths (470-1064 nm), this imaging system can be used for imaging different atom species, such as sodium, lithium, and cesium.

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High-resolution imaging of Rydberg atoms in optical lattices using an aspheric-lens objective in vacuum

Cited by 5 publications

References 31 publications

Two-Color Optical Nonlinearity in an Ultracold Rydberg Atom Gas Mixture

Two-Color Optical Nonlinearity in an Ultracold Rydberg Atom Gas Mixture

A ship-in-a-bottle quantum gas microscope setup for magnetic mixtures

Design of compact high resolution imaging system for cold atom experiments

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