Advanced Optical Materials
·
2018
·Vol. 6
·期 19
·1800400
·
IF 7.43
Leiming Wu,Keqiang Chen,Weichun Huang,Zhitao Lin,Jinlai Zhao,Xiantao Jiang,Yanqi Ge,Feng Zhang,Quannan Xiao,Zhinan Guo,Yuanjiang Xiang,Jianqing Li,Qiaoliang Bao,Han Zhang
Perovskites are demonstrated as an excellent prospect for applications in all-optical switching due to their excellent nonlinear optical effects. In this contribution, 2D cesium lead iodine (CsPbI 3 ) quantum dots (QDs) and cesium lead bromine iodine (CsPbBr x I 3− x ) nanosheets (NSs) are prepared, characterized, and applied in all-optical switching, and their asymmetric nonlinear optical response is also investigated. Moreover, the impact of the beam distortion on the CsPbI 3 QDs and CsPbBr x I 3− x NSs is systematically analyzed. An all-optical switching technique based on perovskite QDs and NSs is experimentally investigated, which is realized by modulating the propagation of the signal beam with another controlling beam using spatial cross-phase modulation. The achievement of all-optical switching indicates that perovskites can be developed as an excellent optical material for all-optical signal processing. The contribution reveals the potential applications of perovskites as a new type of optical information material, and it is therefore anticipated that CsPbI 3 QDs, CsPbBr x I 3− x NSs, and other 2D perovskite NSs could find promising applications in photonics devices (such as optical modulators, optical switchers, and detectors).
研究领域:
材料科学
·
光学工程
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
AIP Advances
·
2019
·Vol. 9
·期 2
·
IF 1.579
Wang Qingkai,Wu Xinghua,Wu Leiming,Xiang Yuanjiang
Compared with homogeneous two-dimensional materials, two-dimensional nanomaterial heterostructures which consist of different kinds of two-dimensional materials exhibit stronger light-matter interaction. The topological insulator of Bi 2 Se 3 -Bi 2 Te 3 heterostructures were synthesised by two-step reaction proceeding. The reaction arised in two steps: at first, Bi 2 Se 3 nanosheets were prepared in the solvent of ethylene glycol (EG); secondly, Bi 2 Te 3 was epitaxial grown on the Bi 2 Se 3 nanosheets to form heterostructure materials. The spatial self-phase modulation (SSPM) effect of 457 nm , 532 nm and 671 nm was achieved by dispersing the as-prepared Bi 2 Se 3 -Bi 2 Te 3 heterostructure materials into ethanol as an optical medium. Furthermore, based on the effect of SSPM, a device called all-optical switching was also realized. As an interesting nonlinear optical materials, topological insulator Bi 2 Se 3 -Bi 2 Te 3 heterostructures might be an effective proposal for photonics devices such as optical switchings, optical modulators, photodetectors, etc.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qian Zhang,Zhuolin Guo,Tuo Li,Beijia Zhao,Jun Dong
Here, we investigate the third-order nonlinear optical (NLO) response of the phenol red (PR) dye solution under cw excitation at 532 nm employing the spatial self-phase modulation (SSPM) method. The results show that two types of diffraction rings (narrow and wide) are produced in the far field , which are attributed to the Kerr effect and Thermal optical nonlinear effect . In addition, the NLO properties of the PR dye under various pH conditions are investigated. Compared with the PR dye solution, the nonlinear refractive index coefficients induced by Kerr effect and Thermal optical nonlinear effect of protonated-PR (P-PR) dye increased by 2.23 and 2.76 times, respectively. These phenomena are explained by the enhanced π-electron delocalization, and the redshift and enhancement of the absorption peak caused by π-π* transitions. Finally, all-optical switching in the PR dye solution is realized based on the Thermal optical nonlinear effect. These findings not only provide a significant reference to tailor nonlinear optical properties of PR dye solutions, but also make PR dye promising candidates in photonic devices applications.
研究领域:
光学材料
·
光子学
·
非线性光学
·
分子光谱学
·
功能染料化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Jun Zhu,Songrui Wei,Jie Tang,Yi Hu,Xiaoyu Dai,You Zi,Mengke Wang,Yuanjiang Xiang,Weichun Huang
Recently, novel two-dimensional materials, e.g., Xenes (graphdiyne, phosphorene, bismuthene, antimonene, etc.) and MXenes, have drawn great attention in nanophotonics due to their excellent flexibility, high photothermal conversion efficiency, and large thermal conductivity. Although the Xenes and MXenes have achieved rapid progress in many fields over the past decade, their relatively poor photodetection and nonlinear photonics have still limited their practical applications. In this work, a mixed-dimensional 2D MXene V2CTx nanosheet (NS)/0D bismuth quantum dot (Bi QD)-based heterostructure fabricated by a combination of selective etching and the hydrothermal method was simply deposited onto a clean poly(ethylene terephthalate) substrate with an embedded regular Ag lattice to prepare a flexible photoelectrochemical (PEC) electrode. The PEC result shows that the as-fabricated flexible electrode not only exhibits significantly improved photocurrent density (32.7 μA cm–2) and photoresponsivity (906 μA W–1) compared to individual MXene V2CTx NSs and Bi QDs but also displays high stability with a stable photocurrent density even after 200 bending cycles at 60°. Taking advantage of the Kerr effect of both MXene V2CTx NSs and Bi QDs, an all-optical switcher based on this mix-dimensional heterostructure for the spatial cross-phase modulation has also been realized with a preferred modulation depth. Density functional theory calculations provide direct evidence for the strong internal built-in electric field (7.3 × 107 eV m–1) created by the heterostructure for the enhancement of both photodetection and nonlinear photonics. The integration of Xenes or MXene-based mixed-dimensional heterostructures provides a concept and fundamental guidance to construct next-generation optoelectronic and photonic devices.
研究领域:
纳米光子学
·
材料科学
·
光电
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）