High‐Resolution Near‐Field Imaging and Far‐Field Sensing Using a Transmissive Programmable Metasurface

2021 ◽  
pp. 2101067
Author(s):  
He Li ◽  
Yun Bo Li ◽  
Gang Chen ◽  
Shu Yue Dong ◽  
Jia Lin Shen ◽  
...  
Keyword(s):  
High Resolution ◽  
Near Field ◽  
Far Field ◽  
Near Field Imaging ◽  
Field Sensing ◽  
Field Imaging

High-Resolution UHF Near-Field Imaging Probe

2018 ◽  
Vol 67 (10) ◽  
pp. 2353-2362 ◽  
Author(s):  
Mohamed A. Abou-Khousa ◽  
K. T. Muhammed Shafi ◽  
Xie Xingyu
Keyword(s):  
High Resolution ◽  
Near Field ◽  
Imaging Probe ◽  
Near Field Imaging ◽  
Field Imaging

scholarly journals A study on the realization of high resolution solid immersion lens-based near-field imaging optics by use of an annular aperture

2010 ◽  
Vol 18 (16) ◽  
pp. 17533 ◽  
Author(s):  
Hyungbae Moon ◽  
Yong-Joong Yoon ◽  
Wan-Chin Kim ◽  
No-Cheol Park ◽  
Kyoung-Su Park ◽  
...  
Keyword(s):  
High Resolution ◽  
Near Field ◽  
Solid Immersion Lens ◽  
Near Field Imaging ◽  
Annular Aperture ◽  
Field Imaging ◽  
Imaging Optics

scholarly journals Near-field imaging with far-field data

2016 ◽  
Vol 60 ◽  
pp. 36-42 ◽  
Author(s):  
Gang Bao ◽  
Peijun Li ◽  
Yuliang Wang
Keyword(s):  
Field Data ◽  
Near Field ◽  
Far Field ◽  
Near Field Imaging ◽  
Field Imaging

Near-Field Scanning Optical Microscopy

1987 ◽  
Vol 45 ◽  
pp. 184-187
Author(s):  
E. Betzig ◽  
M. Isaacson ◽  
A. Lewis ◽  
K. Lin
Keyword(s):  
Spatial Resolution ◽  
Structural Damage ◽  
Near Field ◽  
Far Field ◽  
Resolution Limit ◽  
Field Methods ◽  
General Applicability ◽  
Minimal Sample ◽  
Near Field Imaging ◽  
Field Imaging

The spatial resolution of most of the imaging or microcharacterization methods presently in use are fundamentally limited by the wavelength of the exciting or the emitted radiation being used. In general, the smaller the wavelength of the exciting probe, the greater the structural damage to the sample under study. Thus, the requirements of minimal sample alteration and high spatial resolution seem to be at odds with one another.However, the reason for this wavelength resolution limit is due to the far field methods for producing or detecting the radiation of interest. If one does not use far field optics, but rather the method of near field imaging, the spatial resolution attainable can be much smaller than the wavelength of the radiation used. This method of near field imaging has a general applicability for all wave probes.

High-efficiency and high-resolution fiber-optic probes for near field imaging and spectroscopy

1997 ◽  
Vol 71 (20) ◽  
pp. 2886-2888 ◽  
Author(s):  
M. N. Islam ◽  
X. K. Zhao ◽  
A. A. Said ◽  
S. S. Mickel ◽  
C. F. Vail
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Fiber Optic ◽  
Near Field ◽  
Near Field Imaging ◽  
Fiber Optic Probes ◽  
Imaging And Spectroscopy ◽  
Field Imaging

scholarly journals Phase-Controlled Planar Metalenses for High-Resolution Terahertz Focusing

Photonics ◽  
2021 ◽  
Vol 8 (5) ◽  
pp. 143
Author(s):  
Xin Yu ◽  
Yun Shen ◽  
Guohong Dai ◽  
Liner Zou ◽  
Tailin Zhang ◽  
...  
Keyword(s):  
High Resolution ◽  
Spatial Resolution ◽  
Imaging System ◽  
Incident Light ◽  
Near Field ◽  
Numerical Aperture ◽  
Full Width ◽  
Half Maximum ◽  
Near Field Imaging ◽  
Field Imaging

We experimentally demonstrate that high-resolution terahertz focusing can be realized in planar metalenses, which consist of arrays of different V-shaped antenna units on a silicon substrate. Numerical results show that a larger numerical aperture of metalenses can provide smaller full width at half maximum of field distribution, leading to higher spatial resolution. The measurement of fabricated metalenses samples was performed by a terahertz near-field imaging system, and experimental results agree well with the numerical prediction. Especially for 1.1 THz incident light, when the numerical aperture increases from 0.79 to 0.95, the full width at half maximum correspondingly decreases from 343 μm to 206 μm, offering an improvement of spatial resolution.

scholarly journals High Resolution and Polarization Independent Microwave Near-Field Imaging Using Planar Resonator Probes

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 191421-191432
Author(s):  
Andri Haryono ◽  
Khadeeja Aljaberi ◽  
Mohammed Saif Ur Rahman ◽  
Mohamed A. Abou-Khousa
Keyword(s):  
High Resolution ◽  
Near Field ◽  
Near Field Imaging ◽  
Field Imaging ◽  
Polarization Independent
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