Optimization of the optical near-field distribution of metal multilayer dielectric gratings for pulse compressors

AbstractIn this study, a new optical method is presented to determine the concentrations of NaCl and glucose aqueous solutions by using a thermo-elastic optical indicator microscope. By measuring the microwave near-field distribution intensity, concentration changes of NaCl and glucose aqueous solutions were detected in the 0–100 mg/ml range, when exposed to microwave irradiation at 12 GHz frequency. Microwave near-field distribution intensity decreased as the NaCl or glucose concentration increased due to the changes of the absorption properties of aqueous solution. This method provides a novel approach for monitoring NaCl and glucose in biological liquids by using a CCD sensor capable of visualizing NaCl and glucose concentrations without scanning.

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Near Field Moiré Effect of Subwavelength Dielectric Gratings

2018 International Conference on Optical MEMS and Nanophotonics (OMN) ◽

10.1109/omn.2018.8454607 ◽

2018 ◽

Author(s):

Chenyu Peng ◽

Liang Li ◽

Christopher Yap ◽

Guangya Zhou

Keyword(s):

Near Field ◽

Dielectric Gratings ◽

Moiré Effect

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Analysis of the near field image formation of dielectric gratings

Ultramicroscopy ◽

10.1016/0304-3991(94)00127-9 ◽

1995 ◽

Vol 57 (2-3) ◽

pp. 153-159 ◽

Cited By ~ 5

Author(s):

Yong Chen ◽

R.K. Kupka

Keyword(s):

Near Field ◽

Image Formation ◽

Dielectric Gratings

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Optimizing the optical field distribution of near-field SIL optical storage system using five-zone binary phase filters

Optics Communications ◽

10.1016/j.optcom.2012.02.070 ◽

2012 ◽

Vol 285 (13-14) ◽

pp. 3042-3045 ◽

Cited By ~ 2

Author(s):

Chaolong Fang ◽

Yaoju Zhang ◽

Haiyong Zhu

Keyword(s):

Field Distribution ◽

Near Field ◽

Storage System ◽

Optical Storage ◽

Optical Field ◽

Binary Phase

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Rectangular multilayer dielectric gratings with broadband high diffraction efficiency and enhanced laser damage resistance

Optics Express ◽

10.1364/oe.415847 ◽

2021 ◽

Author(s):

Lingyun Xie ◽

Jinlong Zhang ◽

Zhanyi Zhang ◽

Bin Ma ◽

Tongbao Li ◽

...

Keyword(s):

Diffraction Efficiency ◽

Laser Damage ◽

Damage Resistance ◽

Dielectric Gratings ◽

High Diffraction Efficiency ◽

High Diffraction ◽

Multilayer Dielectric

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Reconstruction of the near-field distribution in an X-ray waveguide array

Journal of Applied Crystallography ◽

10.1107/s1600576717004630 ◽

2017 ◽

Vol 50 (3) ◽

pp. 701-711 ◽

Cited By ~ 2

Author(s):

Qi Zhong ◽

Lars Melchior ◽

Jichang Peng ◽

Qiushi Huang ◽

Zhanshan Wang ◽

...

Keyword(s):

Layer Thickness ◽

Field Distribution ◽

Phase Retrieval ◽

Near Field ◽

Field Pattern ◽

Waveguide Array ◽

X Ray ◽

Field Patterns ◽

Thickness Variations ◽

Far Field Pattern

Iterative phase retrieval has been used to reconstruct the near-field distribution behind tailored X-ray waveguide arrays, by inversion of the measured far-field pattern recorded under fully coherent conditions. It is thereby shown that multi-waveguide interference can be exploited to control the near-field distribution behind the waveguide exit. This can, for example, serve to create a secondary quasi-focal spot outside the waveguide structure. For this proof of concept, an array of seven planar Ni/C waveguides are used, with precisely varied guiding layer thickness and cladding layer thickness, as fabricated by high-precision magnetron sputtering systems. The controlled thickness variations in the range of 0.2 nm results in a desired phase shift of the different waveguide beams. Two kinds of samples, a one-dimensional waveguide array and periodic waveguide multilayers, were fabricated, each consisting of seven C layers as guiding layers and eight Ni layers as cladding layers. These are shown to yield distinctly different near-field patterns.

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