Study and improvement of near‐field diffraction limits of circular aperture imaging systems

2002 ◽  
Vol 25 (3) ◽  
pp. 335-340 ◽  
Author(s):  
Hone‐Ene Hwang ◽  
Gwo‐Huei Yang ◽  
Pin Han
Keyword(s):  
Near Field ◽  
Imaging Systems ◽  
Circular Aperture

Near field properties of circular aperture antennas with Gaussian amplitude distribution

2010 ◽  
Vol 22 (6) ◽  
pp. 1315-1318 ◽  
Author(s):  
余川 Yu Chuan ◽  
陈鑫 Chen Xin ◽  
薛长江 Xue Changjiang ◽  
孟凡宝 Meng Fanbao
Keyword(s):  
Near Field ◽  
Amplitude Distribution ◽  
Circular Aperture ◽  
Aperture Antennas

scholarly journals Terahertz Field Confinement in Nonlinear Metamaterials and Near-Field Imaging

Photonics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 22 ◽  
Author(s):  
George Keiser ◽  
Pernille Klarskov
Keyword(s):  
Terahertz Radiation ◽  
Terahertz Spectroscopy ◽  
Near Field ◽  
Terahertz Imaging ◽  
Imaging Systems ◽  
Near Field Imaging ◽  
Nonlinear Metamaterials ◽  
Terahertz Devices ◽  
Field Imaging ◽  
Sub Wavelength

This article reviews recent advances in terahertz science and technology that rely on confining the energy of incident terahertz radiation to small, very sub-wavelength sized regions. We focus on two broad areas of application for such field confinement: metamaterial-based nonlinear terahertz devices and terahertz near-field microscopy and spectroscopy techniques. In particular, we focus on field confinement in: terahertz nonlinear absorbers, metamaterial enhanced nonlinear terahertz spectroscopy, and in sub-wavelength terahertz imaging systems.

Near-field behavior from circular aperture antenna and tunable gain of a super-Gaussian beam

2011 ◽  
Vol 58 (12) ◽  
pp. 1041-1050
Author(s):  
Xinrong Shi ◽  
Yuan'an Liu ◽  
Fang Liu ◽  
Kaiming Liu ◽  
Gang Xie
Keyword(s):  
Gaussian Beam ◽  
Near Field ◽  
Circular Aperture ◽  
Aperture Antenna ◽  
Field Behavior
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