Sub-40 nm nanogratings self-organized in PVP-based polymer composite film by photoexcitation and two sequent splitting under femtosecond laser irradiation

被引：3

作者：

Chen, Liyun ^{[1
]}

Guo, Chengcheng ^{[1
]}

Pan, Mingming ^{[1
]}

Lai, Chen ^{[1
]}

Wang, Yunxia ^{[1
]}

Liao, Guocai ^{[1
]}

Ma, Ziwei ^{[1
]}

Zhang, Fanwei ^{[1
]}

Suriyaprakash, Jagadeesh ^{[1
]}

Guo, Lijing ^{[2
]}

Akinoglu, Eser Metin ^{[2
]}

Li, Qiang ^{[1
]}

Wu, Lijun ^{[1
]}

机构：

[1] South China Normal Univ, Sch Informat & Optoelect Sci & Engn, Guangdong Prov Key Lab Nanophoton Funct Mat & Devi, Guangzhou 510006, Peoples R China

[2] South China Normal Univ, Int Acad Optoelect Zhaoqing, Guangzhou 510006, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2023年 / 609卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Polyvinyl pyrrolidone; Femtosecond laser irradiation; Nanogratings; Surface plasmon; Splitting phenomenon; PERIODIC SURFACE-STRUCTURES; SUBWAVELENGTH; POLARIZATION; FABRICATION; EXCITATION;

D O I：

10.1016/j.apsusc.2022.155395

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Laser-induced periodic surface structures (LIPSSs) on various materials have been extensively investigated because of their wide applications. The combination of different materials allows for greater freedom in tailoring their functions and achieving responses not possible in a homogeneous material. By utilizing a femtosecond (fs) laser to irradiate the Fe-doped Polyvinyl Pyrrolidone (PVP) composite film, highly regular ultrafine nanogratings (U-nanogratings) with a period as small as 35.0 (+/- 2.0) nm can be self-organized on the surface with extremely high efficiency. The period of the U-nanogratings can be controlled by varying the scanning speed of the laser beam (deposited energy) and the thickness of the composite film. Based on the experimental, theoretical, and simulation results, we propose a two-step formation mechanism: composite film excitation and two sequent grating-splitting. The high photosensitivity and low glass transition temperature of the composite film facilitate the fabrication of the ultrafine nanostructures. The proposed design method for the composite material and fabrication process could not only provide a strategy for obtaining highly regular U-nanogratings, but also offer a platform to explore the interaction physics between ultra-short pulses and matter under extreme conditions.

引用

页数：10