Results 21 to 30 of about 26,044 (311)

Low- and High-Order Optical Nonlinearities of Quantum Dots

Photonics, 2022
Various potential applications of quantum dots (QDs) require knowledge of their optical nonlinearities. In this review, the third-order nonlinearities responsible for the saturable absorption, two-photon absorption, reverse saturable absorption, and ...
Rashid A. Ganeev
doaj   +1 more source

Recent progress of pulsed fiber lasers based on transition-metal dichalcogenides and black phosphorus saturable absorbers

Nanophotonics, 2020
Transition-metal dichalcogenides (TMDCs) and black phosphorus (BP) are typical 2D materials with layer-dependent bandgaps, which are emerging as promising saturable absorption materials for pulsed fiber lasers.
Liu Xing, Gao Qun, Zheng Yang, Mao Dong, Zhao Jianlin   +4 more
doaj   +1 more source

SiO₂ Passivated Graphene Saturable Absorber Mirrors for Ultrashort Pulse Generation

Nanomaterials, 2022
Owing to its broadband absorption, ultrafast recovery time, and excellent saturable absorption feature, graphene has been recognized as one of the best candidates as a high-performance saturable absorber (SA).
Hongpei Wang, Cheng Jiang, Huiyuan Chu, Hao Dai, Beibei Fu, Shulong Lu, Ziyang Zhang   +6 more
doaj   +1 more source

Broadband nonlinear optical properties of red fluorescent carbon dots

Results in Physics, 2022
Carbon dots (CDs) provide ideal platforms for applications in bioimaging, sensing, and photocatalysis. Herein, a new type of red fluorescent carbon dot (RCD) is successfully synthesized, and its broadband nonlinear optical (NLO) properties are ...
Wenxuan Fan, Jun He, Hao Wei, Chen Zhang, Menglong Zhu, Defeng Xu, Si Xiao, Jiangling He, Zhihui Chen, Jianqiao Meng   +9 more
doaj   +1 more source

Bistability and pulsations in cw semiconductor lasers with a controlled amount of saturable absorption [PDF]

, 1981
Experimental results of a buried heterostructure cw laser with a controllable amount of saturable absorption introduced by a segmented contact are presented. With no absorption the laser is stable and has a linear output characteristic. Increasing of the
Harder, Ch., Lau, K. Y., Yariv, A.
core   +1 more source

Bi₂Te₃/Graphene Heterostructure as the Saturable Absorber for ~1.0 μm Passively Q-switched Solid State Pulsed Laser

Crystals, 2022
Due to the tunable nonlinear optical properties of the Bi2Te3/graphene heterostructure, stable solid state pulsed lasers based on the Bi2Te3/graphene saturable absorber have attracted intensive attention. In this work, the Bi2Te3/graphene heterostructure
Yijian Sun, Houping Xia
doaj   +1 more source

Third-order nonlinear optical responses of CuO nanosheets for ultrafast pulse generation

Journal of Materiomics, 2022
As a representative transition metal oxide, cupric oxide (CuO) has attracted a lot of interest in miscellaneous fields. In the present work, the prominent third-order nonlinear optical (NLO) features of CuO nanosheets were demonstrated via the typical Z ...
Li Dong, Hongwei Chu, Ying Li, Shengzhi Zhao, Dechun Li   +4 more
doaj   +1 more source

Realizing Saturable Absorption and Reverse Saturable Absorption in a PEDOT:PSS Film via Electrical Modulation [PDF]

ACS Applied Materials & Interfaces, 2020
Electrical tuning of the nonlinear absorption of materials has promising application potential, while studies remain rare. In this work, we show that the third-order nonlinear absorption of poly(3,4-ethylenedioxythiophene) chemically doped with poly(styrene sulfonic acid) [PEDOT:PSS] can be effectively modulated by external voltage.
Yanhui Sun, Hui Li, Ruipeng Hou, Mengjuan Diao, Ying Liang, Zhipeng Huang, Mark G. Humphrey, Chi Zhang   +7 more
openaire   +2 more sources

Terahertz saturable absorbers from liquid phase exfoliation of graphite

Nature Communications, 2017
Graphene shows promise for saturable absorption, a key property for ultrafast lasing, yet graphene saturable absorbers operating in the terahertz region suffer from low absorption modulation.
Vezio Bianchi, Tian Carey, Leonardo Viti, Lianhe Li, Edmund H. Linfield, A. Giles Davies, Alessandro Tredicucci, Duhee Yoon, Panagiotis G. Karagiannidis, Lucia Lombardi, Flavia Tomarchio, Andrea C. Ferrari, Felice Torrisi, Miriam S. Vitiello   +13 more
doaj   +1 more source

Electrically controllable saturable absorption in hybrid graphene-silicon waveguides [PDF]

, 2015
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Alexander, Koen, Asselberghs, I, Brems, S, Gorza, SP, Hu, Yingtao, Huyghebaert, C, Kuyken, Bart, Pantouvaki, M, Van Campenhout, J, Van Thourhout, Dries   +9 more
core   +3 more sources