Recently, with the support of the National Natural Science Foundation of China and Shenzhen Basic Research, Harbin Institute of Technology (Shenzhen) Micro -Na Naumi Team, Assistant Professor Kim Limin cooperated with Professor Wang Feng and Professor Zhu Shide in Hong Kong University to in the world -renowned journal "Nature Communications" Published a paper entitled "Ultralarge Anti-Stokes Lasing Through Tandem Upconversion" (nat. Commun. 2022, 13: 1032). Harbin Institute of Technology (Shenzhen) is a communication unit, and Jin Limin, Wang Feng, and Zhu Shide are the author of the common communication.
The article pointed out that related ultraviolet light has an important application in environmental and life sciences, but direct ultraviolet laser is facing restrictions on direct manufacturing and operating costs. The research team proposes a deep ultraviolet laser strategy that indirectly generated through the conversion process of series, that is, build a multi -shell nanoparticles, which is stimulated by the 1550 -nanometer remote communication wavelength, and the deep ultraviolet laser output at 290 nanometers is achieved. In the mature telecommunications industry, various optical components are easy to obtain. The research results provide feasible solutions for building miniaturized short -wave laser applicable to device applications.
Regarding the above studies, the article mentioned a series of combinations of 1260 nanometer (≈3.5 EV) oversized anti -Stocks displacement reasons. In this experiment, the conversion process of TM3+and ER3+is limited to different cases through the multi -shell -layer nano structure to reduce the stimulus and energy consumption caused by the uncontrollable energy exchange effects between different conversion processes. This article states that CE3+doping is a necessary condition for achieving Domino conversion. This is because CE3+has suppressed the high -level conversion of ER3+through cross -relaxation, and achieves the number of particles that can be used by 4I11/2 energy levels, which can promote promoting ER3+→ YB3+energy transfer and subsequent conversion process of YB3+→ TM3+. The team integrated the micro -ring laser device with the material with the high Q value (2 × 105) for optical signs. For the first time, the ER3+sensitive deep -ultraviolet conversion laser radiation was observed. The conversion of radiation on the ionic five -light seeds is very sensitive to the Q value factor of the laser cavity, and the sensor measurement is performed by simulating cancer cell secretions with similar size polyethene. , The sensor size is as small as 300 nanometers
