All-dielectric metasurface-based roll-angle sensor

Chen, Xiuguo; Tao, Zhenyi; Chen, Chao; Cai, Wei; Wang, Li; Jiang, Hao; Fan, Daniel; Ekinci, Yasin; Liu, Shiyuan

doi:10.1016/j.sna.2018.06.058

Cited by 16 publications

(5 citation statements)

References 33 publications

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“…However, as mentioned earlier, a strong far-field CO response of the CO axial type has been observed in an all-dielectric metamaterial acting as a uniaxial or a biaxial medium, wherein symmetry breaking of the unit cell along the direction of source propagation enables asymmetric transmission of the two CP components of incident linearly polarized light ( 19 , 24 , 25 ). An additional deployment of geometric phase further enables independent phase-front manipulation of these two components ( 24 , 38 ). We demonstrate the generality of the model by applying it to an all-dielectric optical medium with a mirror-symmetry breaking chiral unit cell that enables asymmetric transmission of the two CP components, but without a geometric phase (section S10), and illustrate the conditions under which the Poynting vectors associated with the LCP and RCP components of a linearly polarized light normally incident on an all-dielectric biaxial medium can propagate in different directions within the medium.…”

Section: Resultsmentioning

confidence: 99%

Microscopic origin of the chiroptical response of optical media

et al. 2019

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The potential for enhancing the optical activity of natural chiral media using engineered nanophotonic components has been central in the quest toward developing next-generation circular-dichroism spectroscopic techniques. Through confinement and manipulation of optical fields at the nanoscale, ultrathin optical elements have enabled a path toward achieving order-of-magnitude enhancements in the chiroptical response. Here, we develop a model framework to describe the underlying physics governing the origin of the chiroptical response in optical media. The model identifies optical activity to originate from electromagnetic coupling to the hybridized eigenstates of a coupled electron-oscillator system, whereas differential absorption of opposite handedness light, though resulting in a far-field chiroptical response, is shown to have incorrectly been identified as optical activity. We validate the model predictions using experimental measurements and show them to also be consistent with observations in the literature. The work provides a generalized framework for the design and study of chiroptical systems.

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Section: Resultsmentioning

confidence: 99%

Microscopic origin of the chiroptical response of optical media

et al. 2019

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“…It is worth mentioning that when the values of d are 6 µm and 9 µm, the transmittances of the two valleys are different, which is caused by the mode coupling in the metamaterial. Moreover, since this mode coupling in the metamaterial can improve the sensitivity of the metamaterial sensors, it may have a certain impact on the sensing performance of the designed EIT sensor [35]. Considering the above factors, we choose both the values of v and s as 0 µm, the value of c as 11.5 µm and the value of d as 7.5 µm.…”

Section: Design and Analysis Of Eit Metamaterials Sensormentioning

confidence: 99%

A terahertz metamaterial sensor with high-sensitivity based on electromagnetically induced transparency effect

Zhu¹,

Wang²,

Li³

et al. 2023

Laser Phys.

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In this study, we design an electromagnetically induced transparency (EIT) effect based on a metamaterial sensor composed of three split-ring structures in the terahertz range. The EIT transparency window appears at 1.83 THz due to the electromagnetic coupling between the three split-rings. To analyze its physical mechanism, we use the ‘two-particle’ model and obtain good consistency between the simulation and theoretical results. The simulation results also show that when the thickness of the measured object is 15 μm and the refractive index is between 1 and 1.5, the refractive index sensitivity of the sensor is as high as 423.9 GHz RIU−1, and the figure of merit value is 6.9. In addition, the sensor is used to simulate the detection and distinction of different types of microbiota. We expect that this work will pave the way for designing high-sensitivity EIT sensors in the terahertz region and promote the development of terahertz sensing and label-free detection of pathogens.

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“…At present, for the pitch angle and deflection angle measurement mainly rely on selfcollimator based on laser collimation measurement technology and laser interferometer based on interference technology [2] . The traditional method for roll angle measurement is to use an electronic level, and there are also many studies on optical measurement methods based on interference [3,4] ,diffraction [5,6] and polarization characteristics [7,8] . The three-dimensional angle simultaneous measurement scheme mainly integrates the integration of each of these parameter measurement methods together.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous 3D small-angle laser measurement based on PZT feedback compensation

Wang,

Zhai,

Wang

2024

2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024)

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All-dielectric metasurface-based roll-angle sensor

Cited by 16 publications

References 33 publications

Microscopic origin of the chiroptical response of optical media

Microscopic origin of the chiroptical response of optical media

A terahertz metamaterial sensor with high-sensitivity based on electromagnetically induced transparency effect

Simultaneous 3D small-angle laser measurement based on PZT feedback compensation

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