A passively Q-switched Nd：YVO4 laser at 1064 nm is demonstrated based on a gold nanotriangle saturable absorber（GNT SA）.Under a pump power of 3.82 W,the maximum average output power of 218mW is achieved,correspondi...A passively Q-switched Nd：YVO4 laser at 1064 nm is demonstrated based on a gold nanotriangle saturable absorber（GNT SA）.Under a pump power of 3.82 W,the maximum average output power of 218mW is achieved,corresponding to a slope efficiency of 12.9%.The minimum pulse width is 165ns and the maximum pulse repetition rate is 300kHz at the pump power of 3.48 W.Our results prove that the GNT SA is a promising saturable absorber for near-infrared lasers.展开更多
Densely packed and ordered ＂suprastructures＂ are new types of nanomaterials exhibiting broad applications. The direct self-assembly of cetyltrimethylammonium bromide （CTAB）-capped gold nanotriangles to form ＂supr...Densely packed and ordered ＂suprastructures＂ are new types of nanomaterials exhibiting broad applications. The direct self-assembly of cetyltrimethylammonium bromide （CTAB）-capped gold nanotriangles to form ＂suprastructures＂ was systematically investigated by varying the temperature and tilt angle of the silicon wafer used in the assembly process. Under optimal conditions, nanotriangles form into regular patterns, maintain their integrity, and form edge-to-edge, point-to-point, and face-to-face connections to form ordered ＂suprastructures＂ within an area of hundreds of square microns, achieving a high level of regularity. The formation of the ＂suprastructures＂ under optimal conditions could be mainly attributed to the complex balance between multiple temperature-dependent factors, including the atom diffusion rate, solvent evaporation rate, self-assembly rate, and the time for which the nanoparticle stays in the wet medium.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 61475086the Natural Science Foundation of Shandong Province under Grant Nos ZR2015FM018 and ZR2014FM028
文摘A passively Q-switched Nd：YVO4 laser at 1064 nm is demonstrated based on a gold nanotriangle saturable absorber（GNT SA）.Under a pump power of 3.82 W,the maximum average output power of 218mW is achieved,corresponding to a slope efficiency of 12.9%.The minimum pulse width is 165ns and the maximum pulse repetition rate is 300kHz at the pump power of 3.48 W.Our results prove that the GNT SA is a promising saturable absorber for near-infrared lasers.
基金Dr. Mattew R. Jones and Prof. Paul Alivisatos from UC Berkeley are appreciated for the valuable discussion about the self-assembly mechanism. This work was supported by the National Basic Research Program of China （973 Program, Nos. 2012CB932800 and 2014CB932700）, National Natural Science Foundation of China （Nos. 21422307, 21303180, 21433003, 21503212, and 21503211）, the ＂Recruitment Program of Global youth Experts＂ of China, Shenzhen Science and Technology Foundation （No. JCYJ20140418182819116）, and the Natural Science Foundation of SZU （No. 201447）.
文摘Densely packed and ordered ＂suprastructures＂ are new types of nanomaterials exhibiting broad applications. The direct self-assembly of cetyltrimethylammonium bromide （CTAB）-capped gold nanotriangles to form ＂suprastructures＂ was systematically investigated by varying the temperature and tilt angle of the silicon wafer used in the assembly process. Under optimal conditions, nanotriangles form into regular patterns, maintain their integrity, and form edge-to-edge, point-to-point, and face-to-face connections to form ordered ＂suprastructures＂ within an area of hundreds of square microns, achieving a high level of regularity. The formation of the ＂suprastructures＂ under optimal conditions could be mainly attributed to the complex balance between multiple temperature-dependent factors, including the atom diffusion rate, solvent evaporation rate, self-assembly rate, and the time for which the nanoparticle stays in the wet medium.
