Sponsor(s): Changchun Institute of Optics,Fine Mehcanics and Physics,Chinese Academy of Sciences 、The Chinese Optical Society
6 issues per year
Current Issue: Issue 05, 2020
Chinese Optics started publishing bimonthly in 2008. It reports on developing trends, significant new findings and new physical insights in worldwide optics, and offers prompt publication of review papers bearing on all branches of science, engineering, and modern technology in optics. It aims to promote the generation, application and archiving of knowledge in optics and to provide a rapid forum for the dissemination of research articles and review articles. The main scopes include micro-nano optics, information optics, integrated optoelectronics, spectroscopy and spectrum instruments, laser technology and applications, optical functional materials, optics functional materials, optics design and technique, atmospheric and space optics, optical instrument and measurement, review, etc.
Director of Editorial Committee CAO Jianlin
Orthogonal luminescence properties of a single rare-earth activator ion doped upconversion nanoparticles
Chinese Optics,2020,Vol 13,No. 05
Upconversion luminescence nanomaterials have attracted widespread attention owing to their special optical properties, while most of them emit single color luminescence. In order to achieve multicolor orthogonal upconversion luminescence and avoid the synthesis complexity and interference between multiple dopant ions, herein, we reported a novel orthogonal emissive upconversion nanoparticle, NaErF 4:Yb(19.5%)/Tm(0.5%)@NaYF 4:Yb(10%)@NaNdF 4:Yb(10%), through thermal decomposition strategy step by step. This novel nanoparticle can give out green luminescence and red luminescence by the energy level transition of Er 3+ from 2H 11/2, 4S 3/2→ 4I 15/2 and 4F 9/2→ 4I 15/2 under the excitation light of 980 nm and 808 nm, respectively. The particles demonstrated uniform size, stable structure, and excellent dispersibility. Under the excitation of 980 nm, the emission intensity at 650 nm of red luminescence was approximately 9.46 times more than the emission intensity at 540 nm. Under the excitation of 808 nm, the emission intensity at 540 nm of green luminescence was about 5.39 times more than the emission intensity at 650 nm.
Chinese Optics,2020,Vol 13,No. 05
At present, narrow-band filter based on resonant waveguide grating structure applied to biosensors can only achieve a single filter mode of reflection or transmission. In order to expand the variety of samples and improve the accuracy of the samples testing, a resonant waveguide grating filter with both reflection and transmission modes was designed based on the guided mode resonance effect. Firstly, based on the classical one-dimensional resonant waveguide grating structure, a filter with a convertible reflection-transmission mode at the same wavelength (632.8 nm) was designed by adjusting the incident conditions. In both modes, excellent filtering performance was presented, spectral efficiency was higher than 98%, and Q factor was greater than 1 000. Then, the resonance mechanism for the same device realizing two filtering modes was analyzed. The results showed that the reflection and transmission narrow-band filtering modes could be converted at the designed wavelength with the same resonant waveguide grating structure under different incident conditions.