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Opto-Electronic Advances
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2019
Volume: 2 Issue 3
5 Article(s)
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IAPLE Special Issue of Opto‐Electronic Advances
[in Chinese]
The International Academy of Photonics and Laser Engineering (IAPLE) is a non-profit, non-governmental, non-political, non-religious, international academic institute, consisting of elected Fellows from different countries with the highest academic/engineering achievements and reputation in the fields of photonic scien
The International Academy of Photonics and Laser Engineering (IAPLE) is a non-profit, non-governmental, non-political, non-religious, international academic institute, consisting of elected Fellows from different countries with the highest academic/engineering achievements and reputation in the fields of photonic sciences and laser engineering, as well as corporation members..
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Opto-Electronic Advances
Publication Date: Jan. 01, 1900
Vol. 2, Issue 3, 1 (2019)
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IAPLE Special Issue of Opto‐Electronic Advances
[in Chinese]
The International Academy of Photonics and Laser Engineering (IAPLE) is a non-profit, non-governmental, non-political, non-religious, international academic institute, consisting of elected Fellows from different countries with the highest academic/engineering achievements and reputation in the fields of photonic scien
The International Academy of Photonics and Laser Engineering (IAPLE) is a non-profit, non-governmental, non-political, non-religious, international academic institute, consisting of elected Fellows from different countries with the highest academic/engineering achievements and reputation in the fields of photonic sciences and laser engineering, as well as corporation members..
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Opto-Electronic Advances
Publication Date: Jan. 01, 1900
Vol. 2, Issue 3, 1 (2019)
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Original Article
All-metallic wide-angle metasurfaces for multifunctional polarization manipulation
Xiaoliang Ma, Mingbo Pu, Xiong Li, Yinghui Guo, and Xiangang Luo
Optical camouflage is a magical capability of animals as first noticed in 1794 by Erasmus Darwin in Zoonomia, but current biomimetic camouflage strategies cannot be readily applied in complex environments involving multispectral and in particular multi-polarization detection. Here we develop a plasmonic approach toward
Optical camouflage is a magical capability of animals as first noticed in 1794 by Erasmus Darwin in Zoonomia, but current biomimetic camouflage strategies cannot be readily applied in complex environments involving multispectral and in particular multi-polarization detection. Here we develop a plasmonic approach toward broadband infrared polarimetric crypsis, where the polarized thermal emission near the pseudo-Brewster angle is the main signal source and no existing polarizing camouflage technique has been discovered in nature. Based on all-metallic subwavelength structures, an electrodynamic resistance-reduction mechanism is proposed to avoid the significant polarization-dependent infrared absorption/radiation. It is also found that the structured metal surface presents giant extrinsic anisotropy regarding the phase shift between orthogonal polarization states, which helps to realize ultrahigh-efficiency and tunable polarization conversion in an unprecedented manner. Finally, we note that the catenary optical theory may provide a useful means to explain and predict these unusual performances..
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Opto-Electronic Advances
Publication Date: Jan. 01, 1900
Vol. 2, Issue 3, 180023 (2019)
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Hierarchical microstructures with high spatial frequency laser induced periodic surface structures possessing different orientations created by femtosecond laser ablation of silicon in liquids
Dongshi Zhang, and Koji Sugioka
High spatial frequency laser induced periodic surface structures (HSFLs) on silicon substrates are often developed on flat surfaces at low fluences near ablation threshold of 0.1 J/cm2, seldom on microstructures or microgrooves at relatively higher fluences above 1 J/cm2. This work aims to enrich the variety of HSFLs-c
High spatial frequency laser induced periodic surface structures (HSFLs) on silicon substrates are often developed on flat surfaces at low fluences near ablation threshold of 0.1 J/cm2, seldom on microstructures or microgrooves at relatively higher fluences above 1 J/cm2. This work aims to enrich the variety of HSFLs-containing hierarchical microstructures, by femtosecond laser (pulse duration: 457 fs, wavelength: 1045 nm, and repetition rate: 100 kHz) in liquids (water and acetone) at laser fluence of 1.7 J/cm2. The period of Si-HSFLs in the range of 110–200 nm is independent of the scanning speeds (0.1, 0.5, 1 and 2 mm/s), line intervals (5, 15 and 20 μm) of scanning lines and scanning directions (perpendicular or parallel to light polarization direction). It is interestingly found that besides normal HSFLs whose orientations are perpendicular to the direction of light polarization, both clockwise or anticlockwise randomly tilted HSFLs with a maximal deviation angle of 50° as compared to those of normal HSFLSs are found on the microstructures with height gradients. Raman spectra and SEM characterization jointly clarify that surface melting and nanocapillary waves play important roles in the formation of Si-HSFLs. The fact that no HSFLs are produced by laser ablation in air indicates that moderate melting facilitated with ultrafast liquid cooling is beneficial for the formation of HSFLs by LALs. On the basis of our findings and previous reports, a synergistic formation mechanism for HSFLs at high fluence was proposed and discussed, including thermal melting with the concomitance of ultrafast cooling in liquids, transformation of the molten layers into ripples and nanotips by surface plasmon polaritons (SPP) and second-harmonic generation (SHG), and modulation of Si-HSFLs direction by both nanocapillary waves and the localized electric field coming from the excited large Si particles..
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Opto-Electronic Advances
Publication Date: Jan. 01, 1900
Vol. 2, Issue 3, 190002 (2019)
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[in Chinese]
[in Chinese]
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Opto-Electronic Advances
Publication Date: Jan. 01, 1900
Vol. 2, Issue 3, 1 (2019)
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