Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing

At the heart of electrically driven semiconductors lasers lies their gain medium that typically comprises epitaxially grown double heterostuctures or multiple quantum wells. The simultaneous spatial confinement of charge carriers and photons afforded by the smaller bandgaps and higher refractive ind...

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Main Authors: Li, Mingjie, Wei, Qi, Muduli, Subas Kumar, Yantara, Natalia, Xu, Qiang, Mathews, Nripan, Mhaisalkar, Subodh G., Xing, Guichuan, Sum, Tze Chien
Other Authors: School of Materials Science & Engineering
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Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/138930
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1389302021-10-07T07:46:33Z Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing Li, Mingjie Wei, Qi Muduli, Subas Kumar Yantara, Natalia Xu, Qiang Mathews, Nripan Mhaisalkar, Subodh G. Xing, Guichuan Sum, Tze Chien School of Materials Science & Engineering School of Physical and Mathematical Sciences Energy Research Institute @ NTU (ERI@N) Science::Physics Exciton Confinement High Stability At the heart of electrically driven semiconductors lasers lies their gain medium that typically comprises epitaxially grown double heterostuctures or multiple quantum wells. The simultaneous spatial confinement of charge carriers and photons afforded by the smaller bandgaps and higher refractive index of the active layers as compared to the cladding layers in these structures is essential for the optical-gain enhancement favorable for device operation. Emulating these inorganic gain media, superb properties of highly stable low-threshold (as low as ≈8 µJ cm-2 ) linearly polarized lasing from solution-processed Ruddlesden-Popper (RP) perovskite microplatelets are realized. Detailed investigations using microarea transient spectroscopies together with finite-difference time-domain simulations validate that the mixed lower-dimensional RP perovskites (functioning as cladding layers) within the microplatelets provide both enhanced exciton and photon confinement for the higher-dimensional RP perovskites (functioning as the active gain media). Furthermore, structure-lasing-threshold relationship (i.e., correlating the content of lower-dimensional RP perovskites in a single microplatelet) vital for design and performance optimization is established. Dual-wavelength lasing from these quasi-2D RP perovskite microplatelets can also be achieved. These unique properties distinguish RP perovskite microplatelets as a new family of self-assembled multilayer planar waveguide gain media favorable for developing efficient lasers. 2020-05-14T03:41:34Z 2020-05-14T03:41:34Z 2018 Journal Article Li, M., Wei, Q., Muduli, S. K., Yantara, N., Xu, Q., Mathews, N., . . . Sum, T. C. (2018). Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing. Advanced Materials, 30(23), 1707235-. doi:10.1002/adma.201707235 0935-9648 https://hdl.handle.net/10356/138930 10.1002/adma.201707235 29709082 2-s2.0-85046098435 23 30 en Advanced Materials 10.21979/N9/VEJNT0 © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Exciton Confinement
High Stability
spellingShingle Science::Physics
Exciton Confinement
High Stability
Li, Mingjie
Wei, Qi
Muduli, Subas Kumar
Yantara, Natalia
Xu, Qiang
Mathews, Nripan
Mhaisalkar, Subodh G.
Xing, Guichuan
Sum, Tze Chien
Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing
description At the heart of electrically driven semiconductors lasers lies their gain medium that typically comprises epitaxially grown double heterostuctures or multiple quantum wells. The simultaneous spatial confinement of charge carriers and photons afforded by the smaller bandgaps and higher refractive index of the active layers as compared to the cladding layers in these structures is essential for the optical-gain enhancement favorable for device operation. Emulating these inorganic gain media, superb properties of highly stable low-threshold (as low as ≈8 µJ cm-2 ) linearly polarized lasing from solution-processed Ruddlesden-Popper (RP) perovskite microplatelets are realized. Detailed investigations using microarea transient spectroscopies together with finite-difference time-domain simulations validate that the mixed lower-dimensional RP perovskites (functioning as cladding layers) within the microplatelets provide both enhanced exciton and photon confinement for the higher-dimensional RP perovskites (functioning as the active gain media). Furthermore, structure-lasing-threshold relationship (i.e., correlating the content of lower-dimensional RP perovskites in a single microplatelet) vital for design and performance optimization is established. Dual-wavelength lasing from these quasi-2D RP perovskite microplatelets can also be achieved. These unique properties distinguish RP perovskite microplatelets as a new family of self-assembled multilayer planar waveguide gain media favorable for developing efficient lasers.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Li, Mingjie
Wei, Qi
Muduli, Subas Kumar
Yantara, Natalia
Xu, Qiang
Mathews, Nripan
Mhaisalkar, Subodh G.
Xing, Guichuan
Sum, Tze Chien
format Article
author Li, Mingjie
Wei, Qi
Muduli, Subas Kumar
Yantara, Natalia
Xu, Qiang
Mathews, Nripan
Mhaisalkar, Subodh G.
Xing, Guichuan
Sum, Tze Chien
author_sort Li, Mingjie
title Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing
title_short Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing
title_full Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing
title_fullStr Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing
title_full_unstemmed Enhanced exciton and photon confinement in Ruddlesden-Popper perovskite microplatelets for highly stable low-threshold polarized lasing
title_sort enhanced exciton and photon confinement in ruddlesden-popper perovskite microplatelets for highly stable low-threshold polarized lasing
publishDate 2020
url https://hdl.handle.net/10356/138930
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