Two-photon pumped spaser based on the CdS/ZnS core/shell quantum dot–mesoporous silica–metal structure
Source abstract
Abstract
The spaser (a plasmonic nanolaser) has rapidly advanced as a subwavelength light source candidate. Herein, we introduce a spaser based on a quantum-dot, mesoporous-oxide, and metal structure from top to bottom consisting of CdS/ZnS core/shell quantum dots, a mesoporous silica film (MSF), and an Au film, respectively. Two-photon pumping using femtosecond laser pulses at 800 nm creates amplified spontaneous emission at approximately 451 nm. The advantages of MSF as a dielectric gap layer are examined through numerical simulations. Measuring the dependence of the luminescence intensity on the average pump power confirms the occurrence of two-photon up-conversion luminescence.
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Research context
OpenAlex topics: Gold and Silver Nanoparticles Synthesis and Applications · Plasmonic and Surface Plasmon Research · Nonlinear Optical Materials Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physics and Electronics, Shandong Provincial Key Laboratory of Optics and Photonic Devices, Shandong Normal University 1 , Jinan 250014, People’s Republic of China
School of Electronic and Information Engineering (Department of Physics), Qilu University of Technology (Shandong Academy of Sciences) 2 , Jinan 250014, People’s Republic of China
Funding
National Natural Science Foundation of China
References (39)
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