Nonlinear optical absorption and ultrafast carrier dynamics of copper antimony sulfide semiconductor nanocrystals

2018 ◽  
Vol 6 (33) ◽  
pp. 8977-8983 ◽  
Author(s):  
Feng Zhang ◽  
Keqiang Chen ◽  
Xiantao Jiang ◽  
Yunzheng Wang ◽  
Yanqi Ge ◽  
...  
Keyword(s):  
Solar Cell ◽  
Optical Absorption ◽  
Nonlinear Optical ◽  
Semiconductor Nanocrystals ◽  
Optical Response ◽  
Carrier Dynamics ◽  
Nonlinear Optical Response ◽  
Antimony Sulfide ◽  
Nonlinear Optical Absorption ◽  
Ultrafast Carrier

Ternary copper antimony sulfide nanocrystals (CAS NCs), a promising solar cell candidate, have been proposed and investigated from the perspective of nonlinear optical response and ultrafast photoinduced carrier dynamics.

scholarly journals Nonlinear optical absorption of non-spherical silver nanoparticles and organic dyes mixtures

2018 ◽  
Vol 190 ◽  
pp. 04016
Author(s):  
Andrey I. Zvyagin ◽  
Aleksey S. Perepelitsa ◽  
Mariya S. Lavlinskaya ◽  
Oleg V. Ovchinnikov ◽  
Mikhail S. Smirnov ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Optical Absorption ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Photochemical Degradation ◽  
Ag Nps ◽  
Nonlinear Optical Absorption

We study the features of the nonlinear optical response of silver nanoparticles (Ag NPs) of spherical and triangular shapes synthesized using a citrate-borohydride approach and their mixtures with methylene blue (MB+). The Z-scans at the wavelengths of 532 nm using 10 ns pulses were used to analyze the nonlinear optical absorption of MB+ solutions, Ag NPs of different morphology, particularly, the concurrence of saturable and reverse saturable absorption in the solution of triangular Ag NP and MB+. We show the significant contribution to the increasing in the normalized transmittance accomplished by photochemical degradation of the non-spherical Ag NPs (extinction maximum of 600 nm) and transformation into the spherical ones (extinction maximum of 400 nm). The nonlinear light scattering is also analyzed, which showed the contribution to the variation of the sample transmission when it approaches the focal plane. It is shown that the nonlinear optical response is not additive in the mixture of Ag NPs and MB+. The increasing of the nonlinear absorption is probably due to both a change in the population of the triplet states of the dye and the efficiency of photochemical degradation of NPs in the presence of MB+.

scholarly journals Ultrafast Carrier Dynamics and Nonlinear Optical Response of InAsP Nanowires

2021 ◽  
Author(s):  
Junting Liu ◽  
He Yang ◽  
Vladislav Khayrudinov ◽  
Harri Lipsanen ◽  
Hongkun Nie ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Response ◽  
Carrier Dynamics ◽  
Nonlinear Optical Response ◽  
Ultrafast Carrier Dynamics ◽  
Ultrafast Carrier

Niobium Carbide MXenes with Broad-Band Nonlinear Optical Response and Ultrafast Carrier Dynamics

ACS Nano ◽  
2020 ◽  
Vol 14 (8) ◽  
pp. 10492-10502 ◽  
Author(s):  
Yiduo Wang ◽  
Yingwei Wang ◽  
Keqiang Chen ◽  
Kun Qi ◽  
Tianyu Xue ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Niobium Carbide ◽  
Broad Band ◽  
Optical Response ◽  
Carrier Dynamics ◽  
Nonlinear Optical Response ◽  
Ultrafast Carrier Dynamics ◽  
Ultrafast Carrier

Surface oxygen-containing defects of graphene nanosheets with tunable nonlinear optical absorption and refraction

2018 ◽  
Vol 20 (42) ◽  
pp. 27105-27114 ◽  
Author(s):  
Baohua Zhu ◽  
Fangfang Wang ◽  
Peng Li ◽  
Chong Wang ◽  
Yuzong Gu
Keyword(s):  
Optical Absorption ◽  
Nonlinear Optical ◽  
Graphene Nanosheets ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Surface Oxygen ◽  
Nonlinear Optical Absorption

Nonlinear optical response of graphene is weakened whether surface oxygen-containing content is too large or too small.

scholarly journals Ultrafast Broadband Nonlinear Optical Response in Co-Doped Sb2Se3 Nanofilms at Near-Infrared

2021 ◽  
Vol 8 ◽  
Author(s):  
Di Sun ◽  
Yu Fang ◽  
Xiaoyan Yan ◽  
Wen Shan ◽  
Wenjun Sun ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Near Infrared ◽  
Optical Response ◽  
Free Carrier ◽  
Nonlinear Optical Response ◽  
Photon Absorption ◽  
Free Carrier Absorption ◽  
Ultrafast Carrier ◽  
Carrier Absorption ◽  
Co Doped

Transition metal-doped Sb2Se3 has become a heated topic caused by the strong nonlinear optical response and the ultrafast response time at high laser excitation. In this paper, the Co-doped Sb2Se3 with different doping amount (0.5, 1.0, and 1.5 W) nanofilms were prepared by magnetron sputtering technology, and the nonlinear behavior of Co-doped Sb2Se3 nanofilms at near infrared were systematically studied. The results of the femtosecond Z-Scan experiment indicate that the Co-doped Sb2Se3 nanofilms exhibit broadband nonlinear response properties owing to the free carrier absorption, the Kerr refraction, the two-photon absorption, and the free carrier refraction. The nonlinear absorption coefficients of Co-doped Sb2Se3 nanofilms are from 3.0 × 10−9 to 2.03 × 10−8 m/ W under excitation at 800, 980, and 1,030 nm, and the nonlinear refractive index of the Co-doped Sb2Se3 nanofilms is from 4.0 × 10−16 to -3.89 × 10−15 m2/ W at 800, 980, and 1,030 nm. More importantly, Co-doped Sb2Se3 (1.5 W) nanofilm exhibits ultrafast carrier absorption (<1 ps) and a stronger transient absorption intensity of ΔOD > 6.3. The Co-doping content can controllably tune the crystalline degree, the ultrafast carrier absorption, the intensity of the reverse saturation absorption, the broadband nonlinear optical response, and the carrier relaxation time of Co-doped Sb2Se3 nanofilms. These results are sufficient to support their applications in broadband nonlinear photonic devices.

Tunable nonlinear optical responses and carrier dynamics of two-dimensional antimonene nanosheets

2020 ◽  
Vol 5 (10) ◽  
pp. 1420-1429 ◽  
Author(s):  
Lei Zhang ◽  
Shah Fahad ◽  
Hao-Ran Wu ◽  
Tao-Tao Dong ◽  
Zi-Zhen Chen ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Strong Influence ◽  
Optical Response ◽  
Carrier Dynamics ◽  
Nonlinear Optical Response ◽  
Two Dimensional ◽  
Size Dependent ◽  
Optical Responses ◽  
Size Controlled

We developed a size-controlled intercalation method to prepare Sb nanosheets. A distinct size-dependent nonlinear optical response, unveiling the strong influence of the scale of the Sb nanosheets on the carrier dynamics was observed.

Sign in / Sign up

Export Citation Format

Share Document