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主办单位：
中国光学工程学会清华大学上海理工大学
名誉主编： 庄松林院士
国际主编： 顾敏院士
主编：
孙洪波教授仇旻教授
创刊：2020年3月
ISSN：2662-1991

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最新上线

Phase-gradient metasurface enables atomic spin chirality detection for elliptically polarized laser-pumped atomic magnetometer

Jiahao Zhang, Shuo Sun, Huanyu Zhou, Rongtong Zhu, Ruofan Li, Jin Li

doi: 10.1186/s43074-025-00189-0

Abstract(0) PDF(0)

Abstract:
The powerful light field manipulation capability of metasurfaces offers a novel development perspective for the quantum precision measurement. By applying the phase-gradient metasurface (PGM) to atomic magnetometers (AMs), we have proposed and experimentally demonstrated a new type of compact single-beam elliptically polarized atomic magnetometers (EPAMs). Employing the fabricated chiral beam splitter PGM with high cross-polarization transmittance, a new atomic spin chirality detection method was devised, enabling the ultra-high sensitivity for extremely weak magnetic field measurement and achieving a high sensitivity of 2.67 pT/Hz^1/2 under an external magnetic field of approximately 10,000 nT. The new AMs combine the pumping and probing polarized light, achieving a compact design. The fabricated PGM has a size of only 3 mm × 3 mm × 0.7 mm, which is beneficial for the miniaturization and integration of AMs. This work effectively expands the application of metasurfaces in the field of quantum precision measurement, and also provides a new viewpoint for the design and development of high-sensitivity and miniaturized AMs.

Surface plasmon driven atomic migration mediated by molecular monolayer

Qihong Hu, Jieyi Zhang, Ramya Emusani, Junchao Yang, Xin Zuo, Yiran Wang, Yonggang Huang, Dong Xiang

doi: 10.1186/s43074-025-00190-7

Abstract(2) PDF(0)

Abstract:
Highly efficient controlling the individual atomic migration is the basis of the modern atomic manufacturing. Although one-by-one atom migration can be realized precisely by STM technique, such a delicate operation is time consuming and restrictive conditions (e.g., high-vacuum) needed to be satisfied. Here, we reported that individual metal atoms can be efficiently transferred from the nanoparticle surface to the underneath substrate via instantaneous laser irradiation under ambient conditions. By inserting self-assembled monolayer (SAM) molecules into nanoparticle-on-mirror (NPoM) structures, a pronounced resonance shift that depends on the dipole moments of the SAM molecules, was observed upon laser irradiation. Assisted by the in-situ measurement of Raman spectra, synchronously capturing dark-field (DF) scattering spectra and DF imaging, it is clarified that the laser-induced localized surface plasmons, which generates strong dipole–dipole interactions, play a critical role in triggering atomic migration. Our study opens an avenue for the highly efficient fabrication of atomic patterns.

An ultra-highly sensitive LITES sensor based on multi-pass cell with ultra-dense spot pattern designed by multi-objective algorithm

Yufei Ma, Xiaorong Sun, Haiyue Sun, Ying He, Shunda Qiao

doi: 10.1186/s43074-025-00187-2

Abstract(16) PDF(0)

Abstract:
Multi-pass cell (MPC) with long optical path length (OPL) and high ratio of optical path length to volume (RLV) can significantly enhance the detection performance of light-induced thermoelastic spectroscopy (LITES) sensor and facilitate system integration. In this paper, an ultra-highly sensitive LITES sensor based on a MPC with ultra-dense spot pattern designed by multi-objective algorithm of parallel nondominated sorting genetic algorithm II (PNSGA-II) was reported for the first time. Five MPCs featuring different dense spot patterns were generated using this PNSGA-II algorithm. The experimental measured OPLs with an excellent RLV of > 20 cm⁻² closely matched the theoretical results, validating the PNSGA-II algorithm and our MPC calculation model as reliable guidance for designing MPCs with superior performance. An acetylene (C₂H₂)-LITES sensor system was constructed using the designed MPC with an actual OPL of 80.14 m. A self-designed round-head quartz tuning fork (QTF) with resonant frequency of 9.5 kHz was used as the detector. The C₂H₂-LITES sensor demonstrated good linear response to C₂H₂ concentration. The achieved minimum detection limit (MDL) for the C₂H₂-LITES sensor was 4.78 ppb, which has a 3.45-fold enhancement when compared to the standard commercial QTF with resonant frequency of 32.768 kHz. Furthermore, according to Allan deviation analysis, the MDL could improve to 891 ppt at an average time of 200 s, demonstrating its ultra-highly sensitive detection performance.

An 8 × 200 Gbps wavelength-division multiplexing transmitter using lithium tantalate

Mingyu Zhu, Fei Huang, Dajian Liu, Weihan Wang, Aoyun Gao, Weike Zhao, Shi Zhao, Daixin Lian, Chun Gao, Zejie Yu, Daoxin Dai

doi: 10.1186/s43074-025-00183-6

Abstract(11) PDF(0)

Abstract:
Large-capacity data transmission is increasingly required to meet the growing demands of big data and artificial intelligence applications. Wavelength-division multiplexing (WDM) technology is a reliable method of increasing link capacity by enabling multiple wavelength signals to be transmitted in a single channel. Here, for the first time, a large-capacity transmitter on thin-film lithium tantalate-on-insulator (LTOI) is demonstrated by monolithically integrating an 8-channel WDM and Mach–Zehnder interferometer (MZI) electro-optic modulators (EOMs). The integrated 8-channel WDM, comprised of 8 cascaded waveguide Bragg grating optical filters, realizes channel spacing of 16.8 nm, 1-dB bandwidth of 15.4 nm, and thermal sensitivity of 10 pm/ºC. The MZI EOMs show low direct current drift and 3-dB bandwidth beyond 67 GHz. Finally, the WDM transmitter achieves a data rate of 100 Gbps OOK and 200 Gbps PAM4 for a single channel, indicating the demonstrated total capacity of 1.6 Tbps. Therefore, the demonstrated large-capacity WDM transmitter will find many applications, such as artificial intelligence and data centers.

引用排行

Terahertz spectroscopy in biomedical field: a review on signal-to-noise ratio improvement

Yan Peng, Chenjun Shi, Yiming Zhu, Min Gu, Songlin Zhuang

2020, 1(1). doi: 10.1186/s43074-020-00011-z

PDF(39)

Recent advances in multi-dimensional metasurfaces holographic technologies

Ruizhe Zhao, Lingling Huang, Yongtian Wang

2020, 1(1). doi: 10.1186/s43074-020-00020-y

PDF(65)

Information Metamaterials: bridging the physical world and digital world

Qian Ma, Tie Jun Cui

2020, 1(1). doi: 10.1186/s43074-020-00006-w

PDF(66)

Vacuum-ultraviolet photodetectors

Lemin Jia, Wei Zheng, Feng Huang

2020, 1(1). doi: 10.1186/s43074-020-00022-w

PDF(37)

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