期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 125, 期 36, 页码 19874-19879出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.1c05662
关键词
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资金
- National Science Foundation (NSF) [DMR-1904385, DMREF-16293823]
- National Science Foundation Graduate Research Fellowship Program [DGE-1324585]
- Soft and Hybrid Nanotechnology Experimental (SHyNE, NSF) [ECCS-2025633]
- IIN
- Northwestern's MRSEC program (NSF) [DMR-1720139]
- SHyNE (NSF) [ECCS-2025633]
- MRSEC program (NSF) [DMR-1720139]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Office of the Provost
- Office for Research
- Northwestern University Information Technology
This paper explores low-threshold lasing from colloidal CdSe nanoplatelets coated on two-dimensional plasmonic cavities composed of aluminum nanoparticles, demonstrating lasing action with low angular divergence, narrow spectral line width, and a threshold of around 200 mu J/cm(2). The research highlights the importance of designing nanoparticle lattices to support surface lattice resonances for achieving lasing.
This paper describes low-threshold lasing from colloidal CdSe nanoplatelets (NPLs) coated on two-dimensional plasmonic cavities composed of aluminum nanoparticles (NPs). We designed the NP lattice to support a spectrally narrow surface lattice resonance whose wavelength overlapped with the amplified spontaneous emission (ASE) from CdSe NPLs. Al NP lattices coated with CdSe NPL thin films were optically pumped and exhibited lasing in the surface normal direction with low angular divergence, narrow spectral line width (similar to 1 nm), and a threshold of similar to 200 mu J/cm(2). Nonlinear light emission characteristics were found to depend on the thickness of the CdSe NPL film. A minimum thickness of 150 nm was required to observe SLR-mediated lasing, but thinner films exhibited only photoluminescence. Films above 150 nm exhibited both in-plane waveguided ASE from the CdSe NPL film and lasing action from the AI NP lattice.
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