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Perovskite nanowire lasers on low-refractive-index conductive substrate for high-Q and low-threshold operation

Perovskite nanowire lasers on low-refractive-index conductive substrate for high-Q and low-threshold operation

Authors :
Markina Daria I.
Pushkarev Anatoly P.
Shishkin Ivan I.
Komissarenko Filipp E.
Berestennikov Alexander S.
Pavluchenko Alexey S.
Smirnova Irina P.
Markov Lev K.
Vengris Mikas
Zakhidov Anvar A.
Makarov Sergey V.
Source :
Nanophotonics, Vol 9, Iss 12, Pp 3977-3984 (2020)
Publication Year :
2020
Publisher :
De Gruyter, 2020.

Abstract

Over the last five years, inorganic lead halide perovskite nanowires have emerged as prospective candidates to supersede standard semiconductor analogs in advanced photonic designs and optoelectronic devices. In particular, CsPbX3 (X = Cl, Br, I) perovskite materials have great advantages over conventional semiconductors such as defect tolerance, highly efficient luminescence, and the ability to form regularly shaped nano- and microcavities from solution via fast crystallization. However, on the way of electrically pumped lasing, the perovskite nanowires grown on transparent conductive substrates usually suffer from strong undesirable light leakage increasing their threshold of lasing. Here, we report on the integration of CsPbBr3 nanowires with nanostructured indium tin oxide substrates possessing near-unity effective refractive index and high conductivity by using a simple wet chemical approach. Surface passivation of the substrates is found out to govern the regularity of the perovskite resonators’ shape. The nanowires show room-temperature lasing with ultrahigh quality factors (up to 7860) which are up to four times higher than that of similar structures on a flat indium tin oxide layer, resulting in more than twofold reduction of the lasing threshold for the nanostructured substrate. Numerical modeling of eigenmodes of the nanowires confirms the key role of low-refractive-index substrate for improved light confinement in the Fabry–Pérot cavity which results in superior laser performance.

Details

Language :
English
ISSN :
21928606 and 21928614
Volume :
9
Issue :
12
Database :
Directory of Open Access Journals
Journal :
Nanophotonics
Publication Type :
Academic Journal
Accession number :
edsdoj.3871225f08124df780f0991376ac925a
Document Type :
article
Full Text :
https://doi.org/10.1515/nanoph-2020-0207