期刊
NANO LETTERS
卷 10, 期 1, 页码 243-249出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl903409x
关键词
Metal nanoparticles; gain; surface plasmon resonance; local field enhancement; SERS
类别
资金
- National Natural Science Foundation of China [10525419, 60736041, 10874238]
- State Key Development Program for Basic Research of China [2006CB302901, 2007CB613205]
Single-molecule detection via surface-enhanced Raman scattering (SERS) has raised great interest over the past decade. The usual approach toward this goal is to harness the strong surface plasmon resonance of light with complex metallic nanostructures. such as particle aggregates, two-particle gaps, sharp tips, or particles with sharp apexes. Here we propose another route toward the goal by introducing gain medium into single metal nanoparticles with simple geometry, Our calculations show that cubic gold nanobox particles that contain a gain material within the core can create art extremely high enhancement factor of local field intensity larger than 10(8) and a SERS enhancement factor on the order of 10(16)-10(17).
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