Photonic crystal heterostructures composed of YbPO4：Er^（3＋） inverse opal and polystyrene opal were prepared via a template-assisted process, which exhibited two photonic band gaps. The microstructure,phase and opt...Photonic crystal heterostructures composed of YbPO4：Er^（3＋） inverse opal and polystyrene opal were prepared via a template-assisted process, which exhibited two photonic band gaps. The microstructure,phase and optical properties of photonic crystal heterostructures were investigated by x-ray diffraction,scanning electron microscopy, fluorescence spectroscopy, absorption spectroscopy, fluorescence lifetime,etc. The upconversion emission suppression caused by single photonic band gap from the following YbPO4：Er^（3＋） inverse opal or the upper opal was observed. The upconversion luminescence was strongly suppressed due to the two photonic band gap overlapping effect caused by the following YbPO4：Er^（3＋） inverse opal or the upper opal. The modified mechanisms of upconversion luminescence were discussed by the upconversion luminescence lifetime of YbPO4：Er^（3＋） photonic crystal heterostructures. The results demonstrated the modified upconversion luminescence is attributed to the photon trapping caused by Bragg reflection of photonic crystal heterostructures.展开更多
Photochromic glass shows great promise for 3D optical information encryption and storage applications.The formation of Ag nanoclusters by light irradiation has been a significant development in the field of photochrom...Photochromic glass shows great promise for 3D optical information encryption and storage applications.The formation of Ag nanoclusters by light irradiation has been a significant development in the field of photochromic glass research.However,extending this approach to other metal nanoclusters remains a challenge.In this study,we present a pioneering method for crafting photochromic glass with reliably adjustable dual-mode luminescence in both the NIR and visible spectra.This was achieved by leveraging bimetallic clusters of bismuth,resulting in a distinct and novel photochromic glass.When rare-earth-doped,bismuth-based glass is irradiated with a 473 nm laser,and it undergoes a color transformation from yellow to red,accompanied by visible and broad NIR luminescence.This phenomenon is attributed to the formation of laserinduced(Bi^(+),Bi^(0))nanoclusters.We achieved reversible manipulation of the NIR luminescence of these nanoclusters and visible rare-earth luminescence by alternating exposure to a 473 nm laser and thermal stimulation.Information patterns can be inscribed and erased on a glass surface or in 3D space,and the readout is enabled by modulating visible and NIR luminescence.This study introduces a pioneering strategy for designing photochromic glasses with extensive NIR luminescence and significant potential for applications in highcapacity information encryption,optical data storage,optical communication,and NIR imaging.The exploration of bimetallic cluster formation in Bi represents a vital contribution to the advancement of multifunctional glass systems with augmented optical functionalities and versatile applications.展开更多
基金Project supported by the National Natural Science Foundation of China(11674137)the Applied Basic Research Program of Yunnan Province(2014FB127)+1 种基金Reserve Talents Project of Yunnan Province(2012HB068)Talent Youth Science Foundation of College of Materials Science and Technology,Kunming University of Science and Technology(20140205)
文摘Photonic crystal heterostructures composed of YbPO4：Er^（3＋） inverse opal and polystyrene opal were prepared via a template-assisted process, which exhibited two photonic band gaps. The microstructure,phase and optical properties of photonic crystal heterostructures were investigated by x-ray diffraction,scanning electron microscopy, fluorescence spectroscopy, absorption spectroscopy, fluorescence lifetime,etc. The upconversion emission suppression caused by single photonic band gap from the following YbPO4：Er^（3＋） inverse opal or the upper opal was observed. The upconversion luminescence was strongly suppressed due to the two photonic band gap overlapping effect caused by the following YbPO4：Er^（3＋） inverse opal or the upper opal. The modified mechanisms of upconversion luminescence were discussed by the upconversion luminescence lifetime of YbPO4：Er^（3＋） photonic crystal heterostructures. The results demonstrated the modified upconversion luminescence is attributed to the photon trapping caused by Bragg reflection of photonic crystal heterostructures.
基金supported by the National Natural Science Foundation of China (51762029 and 12204206)Yunnan Fundamental Research Project (202101BE070001-043 and 202201AU070119)+3 种基金the National Natural Science Foundation of High-end Foreign Experts Introduction Plan (G2022039008L)the Academician Workstation of Cherkasova Tatiana in Yunnan Province (202305AF150099)Yunnan Province Major Science and Technology Special Plan (202302AB080005)Chuoli Chengcai Training Program of KUST Faculty of Materials Science and Engineering (CLXYCLCC2023070)
基金financially supported by the National Natural Science Foundation of High-end Foreign Experts Introduction Plan(G2022039008L)the Key Project of the National Natural Science Foundation of China-Yunnan Joint Fund(U2102215)Yunnan Major Scientific and Technological Projects(202202AG050016)。
基金Key Project of the National Natural Science Foundation of China-Yunnan Joint Fund,Grant/Award Number:U2102215National Natural Science Foundation of High End Foreign Expert Introduction Plan,Grant/Award Number:G2022039008L+1 种基金Academician Workstation of Cherkasova Tatiana in Yunnan Province,Grant/Award Number:202305 AF150099Yunnan Province Major Science and Technology Special Plan,Grant/Award Number:202302AB080005。
文摘Photochromic glass shows great promise for 3D optical information encryption and storage applications.The formation of Ag nanoclusters by light irradiation has been a significant development in the field of photochromic glass research.However,extending this approach to other metal nanoclusters remains a challenge.In this study,we present a pioneering method for crafting photochromic glass with reliably adjustable dual-mode luminescence in both the NIR and visible spectra.This was achieved by leveraging bimetallic clusters of bismuth,resulting in a distinct and novel photochromic glass.When rare-earth-doped,bismuth-based glass is irradiated with a 473 nm laser,and it undergoes a color transformation from yellow to red,accompanied by visible and broad NIR luminescence.This phenomenon is attributed to the formation of laserinduced(Bi^(+),Bi^(0))nanoclusters.We achieved reversible manipulation of the NIR luminescence of these nanoclusters and visible rare-earth luminescence by alternating exposure to a 473 nm laser and thermal stimulation.Information patterns can be inscribed and erased on a glass surface or in 3D space,and the readout is enabled by modulating visible and NIR luminescence.This study introduces a pioneering strategy for designing photochromic glasses with extensive NIR luminescence and significant potential for applications in highcapacity information encryption,optical data storage,optical communication,and NIR imaging.The exploration of bimetallic cluster formation in Bi represents a vital contribution to the advancement of multifunctional glass systems with augmented optical functionalities and versatile applications.
