Journal
NANO LETTERS
Volume 14, Issue 10, Pages 5995-6001Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl503057g
Keywords
Organic-inorganic perovskites; whispering gallery mode lasing; near-infrared lasers; nanoplatelets; wavelength tunable; on-chip integration
Categories
Funding
- Singapore Ministry of Education [MOE2011-T2-2-051]
- Singapore National Research Foundation [NRF-RF2009-06]
- Competitive Research Program [NRF-CRP-6-2010-2, NRF-CRP5-2009-04]
- Nanyang Technological University [M58110061]
- New Initiative Fund [M58110100]
- NTU [M4080514]
- SPMS collaborative Research [M4080536]
- Ministry of Education [M0E2013-T2-1-081]
- National Research Foundation (NRF), Prime Minister's Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) programme
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Near-infrared (NIR) solid state micro/nanolasers are improtant building blocks for true integration of optoelectronic circuitry.(1) Although significant progress has been made in III-V nanowire lasers with achieving NIR lasing at room temperature,(2-4) challenges remain including low quantum efficiencies and high auger losses. Imporatntly, the obstacles toward integrating one-dimensioanl nanowires on the planar ubquitous Si platform need to be effectively tackled. Here we demonstrate a new family of planar room-temperature NIR nanolasers based on organic-inorganic perovskite CH3NH3PbI3-aXa (X = I, Br, Cl) nanoplatelets. Their large exciton binding energies, long diffusion lengths, and naturally formed high quality planar whispering-gallery mode cavities ensure adequate gain and efficient optical feedback for low-threshold optically pumpbed in-plane lasing. We show that these remarkable wavelength tunable whispering-gallery nanolasers can be easily integrated onto conductive platforms (Si, Au, indium tin oxidie, and so forth). Our findings open up a new class of wavelength tunable palanar nanomaterials potentially suitable for on-chip integration.
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