Abstract
This paper describes a symmetry-breaking plasmonic lattice structure that can support narrow resonances as optical feedback for nanolasing. A scalable technique is developed to fabricate nanocrescent arrays with low-structural symmetry unit cells to achieve in-plane quadrupolar lattice plasmon modes. These lattice plasmons with extremely narrow linewidths preserve nonzero net dipole moments under normal excitation. Ultrafast band-edge lasing can be switched on and off by changing the polarization of the incident pump light. The quadrupolar lattice plasmon lasing process is simulated with a semi-quantum model and the sharp tips on the nanocrescents accelerate the lasing buildup process and enhance stimulated emission.
| Original language | English (US) |
|---|---|
| Article number | 1904157 |
| Journal | Advanced Functional Materials |
| Volume | 29 |
| Issue number | 42 |
| DOIs | |
| State | Published - Oct 1 2019 |
Funding
This work was supported by National Science Foundation (NSF) under Grant No. DMR-1608258 (D.W., W.W., J.G., and T.W.O.), the Vannevar Bush Faculty Fellowship from the department of defense (DOD) under N00014-17-1-3023 (D.W. J.H., J.G., and T.W.O.), and the scholarship from China Scholarship Council. This work made use of the Electron Probe Instrumentation Center (EPIC), Keck-II, and Scanned Probe Imaging and Development (SPID) facilities of Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the Materials Research Science and Engineering Center (MRSEC) program; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. This work utilized the Northwestern University Micro/Nano Fabrication Facility (NUFAB) and the Materials Processing and Microfabrication Facility (NUFABCook). This research was supported in part through the computational resources and staff contributions provided for the Quest high performance computing facility at Northwestern University, which is jointly supported by the Office of the Provost, the Office for Research, and Northwestern University Information Technology.
Keywords
- plasmon lasing
- plasmonic nanocrescents
- quadrupolar lattice plasmons
- symmetry breaking
- tip effects
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- General Chemistry
- General Materials Science
- Electrochemistry
- Biomaterials