Journal
SCIENCE ADVANCES
Volume 7, Issue 35, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abf3362
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Funding
- NIH [DP1EB024242]
- Massachusetts General Hospital Research Scholar Award
- Samsung Scholarship
- Wellman-Bullock Fellowship
- NSF [1541959]
- U.S. Army Research Office through the Institute for Soldier Nanotechnologies at MIT [W911NF-18-2-0048]
- Air Force Office of Scientific Research [FA9550-20-10115]
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This study demonstrates submicrometer-sized plasmonic lasers using CsPbBr3 crystals on gold substrates, highlighting the importance of enhanced optical gain, spontaneous emission factor, and high group index for efficient plasmonic lasing.
Plasmonic lasers attracted interest for their ability to generate coherent light in mode volume smaller than the diffraction limit of photonic lasers. While nanoscale devices in one or two dimensions were demonstrated, it has been difficult to achieve plasmonic lasing with submicrometer cavities in all three dimensions. Here, we demonstrate submicrometer-sized, plasmonic lasers using cesium-lead-bromide perovskite (CsPbBr3) crystals, as small as 0.58 mu m by 0.56 mu m by 0.32 mu m (cuboid) and 0.79 mu m by 0.66 mu m by 0.18 mu m (plate), on polymer-coated gold substrates at room temperature. Our experimental and simulation data obtained from more than 100 plasmonic and photonic devices showed that enhanced optical gain by the Purcell effect, large spontaneous emission factor, and high group index are key elements to efficient plasmonic lasing. The results shed light on the three-dimensional miniaturization of plasmonic lasers.
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