Solution-processed PbS quantum dot infrared laser with room-temperature tuneable emission in the optical telecommunications window.

Autor: Whitworth GL; ICFO, Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona) 08860Spain., Dalmases M; ICFO, Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona) 08860Spain., Taghipour N; ICFO, Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona) 08860Spain., Konstantatos G; ICFO, Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona) 08860Spain.; ICREA, Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain.
Jazyk: angličtina
Zdroj: Nature photonics [Nat Photonics] 2021 Oct; Vol. 15 (10), pp. 738-742. Date of Electronic Publication: 2021 Sep 28.
DOI: 10.1038/s41566-021-00878-9
Abstrakt: Solution processed semiconductor lasers have achieved much success across the nanomaterial research community, including in organic semiconductors 1,2 , perovskites 3,4 and colloidal semiconductor nanocrystals 5,6 . The ease of integration with other photonic components, and the potential for upscaling using emerging large area fabrication technologies, such as roll-to-roll 7 , make these lasers attractive as low-cost photonic light sources that can find use in a variety of applications: integrated photonic circuitry 8,9 , telecommunications 10,11 , chemo-/bio-sensing 12,13 , security 14 , and lab-on-chip experiments 15 . However, for fiber-optic or free-space optical (FPO) communications and eye-safe LIDAR applications, room temperature solution-processed lasers have remained elusive. Here we report the first solution processed laser, comprising PbS colloidal quantum dots (CQDs) integrated on a distributed feedback (DFB) cavitiy, with tuneable lasing wavelength from 1.55 μm - 1.65 μm. These lasers operate at room temperature and exhibit linewidths as low as ~0.9 meV.
Competing Interests: Competing interests The authors declare no competing interest
Databáze: MEDLINE
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