A novel method for generating axial cosine structured light using spatial light modulator

2020 ◽  
Author(s):  
Xianlin Song ◽  
Jianshuang Wei ◽  
Lingfang Song
Keyword(s):  
Spatial Light Modulator ◽  
Structured Light ◽  
Light Modulator ◽  
Novel Method

Robust Structured Light Pattern for Use with a Spatial Light Modulator in 3-D Endoscopy

2013 ◽  
Vol 7 (2) ◽  
pp. 105-121 ◽  
Author(s):  
Benjamin Mertens ◽  
Benjamin De Leener ◽  
Olivier Debeir ◽  
Charles Beumier ◽  
Pierre Lambert ◽  
...  
Keyword(s):  
Spatial Light Modulator ◽  
Structured Light ◽  
Light Modulator ◽  
Light Pattern

Research on Axial Multi-Focus Scanning in Confocal Microscopy with Liquid Crystal Spatial Light Modulator

2017 ◽  
Vol 870 ◽  
pp. 27-33
Author(s):  
Li Min Zou ◽  
Meng Jiao Zhou ◽  
Bao Kai Wang ◽  
Xue Mei Ding
Keyword(s):  
Liquid Crystal ◽  
Confocal Microscopy ◽  
Spatial Light Modulator ◽  
Fresnel Lens ◽  
Light Modulator ◽  
Scanning Method ◽  
Mechanical Parts ◽  
Fixed Sample ◽  
Novel Method ◽  
Axial Scanning

In this paper, a non-mechanical axial zoom scanning method based on a phase only liquid crystal spatial light modulator is proposed. This novel method is to overcome the measurement error caused by moving mechanical parts in the axial mechanical scanning methods in the confocal microscopy system. The modulation on the incident wave front is completed by a spatial light modulator, which provides this scanning method some outstanding advantages including the flexibility of control and the absence of moving mechanical parts, especially suitable for the fixed sample imaging occasions. By simulating the multiple Fresnel lens with LCSLM to generate controllable multi-focal points and thus realizing this method of axial multi-focus scanning to enhance the axial scanning efficiency and the range. Simulations and experiments on the axial scanning features of the axial multi-focus zoom scanning method are carried out. Results of simulations and experiments indicate that non-mechanical axial zoom scanning can be realized with the use of a spatial light modulator in the confocal microscopy system.

scholarly journals Reconfigurable terahertz metasurfaces coherently controlled by wavelength-scale-structured light

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Kamalesh Jana ◽  
Emmanuel Okocha ◽  
Søren H. Møller ◽  
Yonghao Mi ◽  
Shawn Sederberg ◽  
...  
Keyword(s):  
Terahertz Radiation ◽  
Spatial Light Modulator ◽  
Coherent Control ◽  
Structured Light ◽  
Electric Polarization ◽  
Light Modulator ◽  
Structured Materials ◽  
Optical Metamaterials ◽  
Wavelength Scale ◽  
Transfer Structure

Abstract Structuring light–matter interaction at a deeply subwavelength scale is fundamental to optical metamaterials and metasurfaces. Conventionally, the operation of a metasurface is determined by the collective electric polarization response of its lithographically defined structures. The inseparability of electric polarization and current density provides the opportunity to construct metasurfaces from current elements instead of nanostructures. Here, we realize metasurfaces using structured light rather than structured materials. Using coherent control, we transfer structure from light to transient currents in a semiconductor, which act as a source for terahertz radiation. A spatial light modulator is used to control the spatial structure of the currents and the resulting terahertz radiation with a resolution of 5.6 ± 0.8  μm $5.6\pm 0.8\mathrm{\,\mu m}$ , or approximately λ / 54 $\lambda /54$ at a frequency of 1 THz. The independence of the currents from any predefined structures and the maturity of spatial light modulator technology enable this metasurface to be reconfigured with unprecedented flexibility.

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