scholarly journals Beam Splitters Fabricated by Nonlinear Focusing of Femtosecond Laser Writing in Pure YAG Crystal

2021 ◽  
Vol 9 ◽  
Author(s):  
Pengfei Wu ◽  
Senchi Yang ◽  
Yingying Ren ◽  
Hongliang Liu

We report on the fabrication of waveguides and beam splitters in pure YAG crystals by femtosecond laser direct writing (FLDW). During the femtosecond laser writing process, a positive refractive index is induced through the nonlinear focusing above the focus position, resulting in an unusual guiding cross-sectional configuration. The supported guiding modes at 632.8 nm are measured and analyzed using the end–face coupling system. The propagation loss can be as low as 1.9 dB/cm for the single-line waveguide. Different from the geometry of the traditional fs-laser modified area, this novel structure might offer a new approach in the quest toward integrated photonics.

2014 ◽  
Vol 23 (04) ◽  
pp. 1450048 ◽  
Author(s):  
Hongxin Zhang ◽  
Tianqing Jia ◽  
Kan Zhou ◽  
Jukun Liu ◽  
Donghai Feng ◽  
...  

In this paper, we report gold micro/nanostructures fabricated by a method called lithographically patterned nanostructure by chemical etching (LPNCE). In the LPNCE method, the photoresist layer, composed of pentaerythritol triacrylate (PETA, monomer) and isopropyl thioxanthone (ITX, photoinitiator), is dropped on gold film, and subsequently polymerized via two-photon absorption of 800 nm femtosecond laser. Micro/nanostructures are fabricated by the direct laser writing. The unpolymerized photoresist is washed by isopropanol, and the exposed gold is dissolved by KI 3 aqueous solution. Finally, polymers are removed by NaOH ethanol solution. Arbitrary 2D gold micro/nanostructures can be fabricated quickly by the direct laser writing and chemical etching method. The good electro-conductibility of these micro/nanostructures guarantees wide applications in micro-electronic devices, plasmonics and biosensors, etc.


2022 ◽  
Vol 145 ◽  
pp. 107500
Author(s):  
Bo Wu ◽  
Bin Zhang ◽  
Weijie Liu ◽  
Qingming Lu ◽  
Lei Wang ◽  
...  

2016 ◽  
Vol 34 (15) ◽  
pp. 3587-3591 ◽  
Author(s):  
Jinman Lv ◽  
Yazhou Cheng ◽  
Javier R. Vazquez de Aldana ◽  
Xiaotao Hao ◽  
Feng Chen

2014 ◽  
Vol 22 (25) ◽  
pp. 31293 ◽  
Author(s):  
Ruiyun He ◽  
Irene Hernández-Palmero ◽  
Carolina Romero ◽  
Javier R. Vázquez de Aldana ◽  
Feng Chen

2021 ◽  
Vol 61 ◽  
pp. 102427
Author(s):  
Xiaoyan Sun ◽  
Zikun Chang ◽  
Li Zeng ◽  
Xinran Dong ◽  
Youwang Hu ◽  
...  

2021 ◽  
pp. 2100178
Author(s):  
Wenguang Yang ◽  
Honghui Chu ◽  
Shuxiang Cai ◽  
Wenfeng Liang ◽  
Haibo Yu ◽  
...  

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