scholarly journals Improvement of Microwave Electric Field Measurement Sensitivity via Multi-Carrier Modulation in Rydberg Atoms

2020 ◽  
Vol 10 (22) ◽  
pp. 8110
Author(s):  
Shaohua Li ◽  
Jinpeng Yuan ◽  
Lirong Wang
Keyword(s):  
Electric Field ◽  
Electromagnetically Induced Transparency ◽  
Signal To Noise Ratio ◽  
Rydberg Atom ◽  
High Sensitivity ◽  
Modulation Scheme ◽  
Measurement Sensitivity ◽  
System A ◽  
Spectral Signal ◽  
Induced Transparency

The microwave electric field intensity is precisely measured by the Autler–Townes splitting of electromagnetically induced transparency spectrum in a 5S1/2−5P3/2−57D5/2−58P3/2 four-level ladder-type 85Rb atomic system. A robust multi-carrier modulation scheme is employed to improve the spectral signal-to-noise ratio, which determines the optical readout of Rydberg atom-based microwave electrometry. As a result, a factor of 2 measurement sensitivity improvement is clearly achieved compared with the on resonant Autler–Townes splitting case credit to the advantage of matched filtering. This research paves the way for building a high sensitivity, portable sensor and offers a platform for achieving compact and sensitive receiver.

scholarly journals Sensing Enhancement of Electromagnetically Induced Transparency Effect in Terahertz Metamaterial by Substrate Etching

2021 ◽  
Vol 9 ◽  
Author(s):  
Tingling Lin ◽  
Yi Huang ◽  
Shuncong Zhong ◽  
Manting Luo ◽  
Yujie Zhong ◽  
...  
Keyword(s):  
Electric Field ◽  
Electromagnetically Induced Transparency ◽  
High Sensitivity ◽  
Strong Light ◽  
Refractive Index Sensing ◽  
Quadrupole Resonance ◽  
Matter Interaction ◽  
Potential Applications ◽  
Light Matter Interaction ◽  
Induced Transparency

A broad range of terahertz (THz) metamaterials have been developed for refractive index sensing. However, most of these metamaterials barely make sufficient use of the excited electric field which is crucial to achieve high sensitivity. Here, we proposed a metamaterial sensor possessing electromagnetically induced transparency (EIT) resonance that is formed by the interference of dipole and quadrupole resonance. In particular, the strengthening of light-matter interaction is realized through substrate etching, leading to a remarkable improvement in sensitivity. Hence, three kinds of etching mode were presented to maximize the utilization of the electric field, and the corresponding highest sensitivity is enhanced by up to ~2.2-fold, from 0.260 to 0.826 THz/RIU. The proposed idea to etch substrate with a strong light-matter interaction can be extended to other metamaterial sensors and possesses potential applications in integrating metamaterial and microfluid for biosensing.

scholarly journals Rydberg Level Shift due to the Electric Field Generated by Rydberg Atom Collision Induced Ionization in Cesium Atomic Ensemble

2020 ◽  
Vol 10 (16) ◽  
pp. 5646 ◽  
Author(s):  
Xin Wang ◽  
Jun He ◽  
Jiandong Bai ◽  
Junmin Wang
Keyword(s):  
Electric Field ◽  
Electromagnetically Induced Transparency ◽  
Signal To Noise Ratio ◽  
Classical Model ◽  
Rydberg Atom ◽  
Optical Excitation ◽  
Atomic Ensemble ◽  
High Signal ◽  
Level Shift ◽  
Atom Collision

We experimentally studied the Rydberg level shift caused by the electric field, which is generated by Rydberg atom collision induced ionization in a cesium atomic ensemble. The density of charged particles caused by collisions between Rydberg atoms is changed by controlling the ground-state atomic density and optical excitation process. We measured the Rydberg level shift using Rydberg electromagnetically-induced-transparency (EIT) spectroscopy, and interpreted the physical origin using a semi-classical model. The experimental results are in good agreement with the numerical simulation. These energy shifts are important for the self-calibrated sensing of microwave field by the employing of Rydberg EIT. Moreover, in contrast to the resonant excitation case, narrow-linewidth spectroscopy with high signal-to-noise ratio would be useful for high-precision measurements.

Improvement of Signal-to-Noise Ratio of Electromagnetically-Induced Transparency Spectra in the Ladder-Type Cesium 6S1/2-6P1/2-8S1/2Atomic System

2013 ◽  
Vol 33 (10) ◽  
pp. 1030003
Author(s):  
刘慧丰 Liu Huifeng ◽  
王杰 Wang Jie ◽  
杨保东 Yang Baodong ◽  
温馨 Wen Xin ◽  
靳刚 Jin Gang ◽  
...  
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Noise Ratio ◽  
Induced Transparency

scholarly journals Tunable Fano resonances in a robust quasicylindrical microresonator photonic system

2018 ◽  
Vol 189 ◽  
pp. 11009
Author(s):  
Xueying Jin ◽  
Mengyu Wang ◽  
Yongchao Dong ◽  
Liming Chen ◽  
Fei Li ◽  
...  
Keyword(s):  
Optical Switching ◽  
Electromagnetically Induced Transparency ◽  
High Sensitivity ◽  
Selective Excitation ◽  
Fano Resonances ◽  
All Optical ◽  
Induced Transparency ◽  
First Time ◽  
And Storage ◽  
All Optical Switching

The control of Fano resonances is of critical importance to opto-electronic and all-optical switching devices, light delay and storage, high sensitivity sensors, and quantum information processors. In this paper, we experimentally and theoretically demonstrate that controllable electromagnetically induced transparency (EIT)-like and Fano resonances can be achieved in a single quasi-cylindrical microresonator (QCMR). Robust and selective excitation of localized axial modes in a high quality QCMR is firstly demonstrated. Based on this stable platform, EIT-like lineshapes can be tuned and converted into Fano resonances by vertically moving the resonator. Moreover, by horizontally scanning the resonator, the transmission spectrum exhibits periodically changed Fano-like lineshapes. It is reported for the first time that the above two kinds of Fano resonances originated from different mechanisms can work on the same mode simultaneously. Our approach, demonstrated in this work, provides a robust photonic platform for accessing, controlling, and engineering the Fano resonances.

Rydberg electromagnetically induced transparency and Autler–Townes splitting in a weak radio-frequency electric field

2019 ◽  
Vol 28 (5) ◽  
pp. 053202 ◽  
Author(s):  
Liping Hao ◽  
Yongmei Xue ◽  
Jiabei Fan ◽  
Yuechun Jiao ◽  
Jianming Zhao ◽  
...  
Keyword(s):  
Electric Field ◽  
Radio Frequency ◽  
Electromagnetically Induced Transparency ◽  
Frequency Electric Field ◽  
Induced Transparency

scholarly journals Electromagnetically induced transparency of a cesium Rydberg atom in weak radio-frequency field

2017 ◽  
Vol 66 (9) ◽  
pp. 093202
Author(s):  
Yang Zhi-Wei ◽  
Jiao Yue-Chun ◽  
Han Xiao-Xuan ◽  
Zhao Jian-Ming ◽  
Jia Suo-Tang
Keyword(s):  
Radio Frequency ◽  
Electromagnetically Induced Transparency ◽  
Rydberg Atom ◽  
Radio Frequency Field ◽  
Frequency Field ◽  
Induced Transparency
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