Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue

Achieving low-threshold optical gain for solution-processed materials is crucial for their real-life applications and deployment as gain media. However, the realization of low gain threshold in the blue region has shown to be technically an extremely challenging task using colloidal nanocrystals as...

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Main Authors: Delikanli, Savas, Isik, Furkan, Shabani, Farzan, Baruj, Hamed Dehghanpour, Taghipour, Nima, Demir, Hilmi Volkan
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/148384
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1483842021-05-03T08:49:13Z Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue Delikanli, Savas Isik, Furkan Shabani, Farzan Baruj, Hamed Dehghanpour Taghipour, Nima Demir, Hilmi Volkan School of Electrical and Electronic Engineering LUMINOUS! Centre of Excellence for Semiconductor Lighting & Displays Science::Physics Amplified Spontaneous Emission Blue Optical Gain Achieving low-threshold optical gain for solution-processed materials is crucial for their real-life applications and deployment as gain media. However, the realization of low gain threshold in the blue region has shown to be technically an extremely challenging task using colloidal nanocrystals as a result of fast nonradiative Auger rates in smaller nanocrystals. Here, ultralow-threshold blue amplified spontaneous emission (ASE) (≈2.7 µJ cm ) accompanied with a large net modal gain coefficient of 360 cm in the blue enabled by blue-emitting (≈455–465 nm) colloidal quantum rings (QRs) of inverted type-I CdS/CdSe core/crown nanoplatelets (NPLs) is proposed and demonstrated. The synthesized QRs with controlled crown size outperform the best reported ASE thresholds and net modal gain coefficients from the solution-processed materials by ≈2.5- and ≈4-fold, respectively, in the similar blue spectral window. Utilizing this QR architecture, it is also shown that the ASE peak can be spectrally tuned by controlling the lateral size of the crown and hence quantum confinement in the lateral direction. These outstanding results support the prospects of these solution-processed QRs made of 2D hetero-NPLs in the challenging blue region as colloidal gain. Agency for Science, Technology and Research (A*STAR) National Research Foundation (NRF) Accepted version 2021-05-03T08:49:13Z 2021-05-03T08:49:13Z 2021 Journal Article Delikanli, S., Isik, F., Shabani, F., Baruj, H. D., Taghipour, N. & Demir, H. V. (2021). Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue. Advanced Optical Materials, 9(8), 2002220-. https://dx.doi.org/10.1002/adom.202002220 2195-1071 0000-0002-0613-8014 0000-0003-2174-5960 0000-0003-1094-5406 0000-0003-1793-112X https://hdl.handle.net/10356/148384 10.1002/adom.202002220 2-s2.0-85100845822 8 9 2002220 en Advanced Optical Materials This is the peer reviewed version of the following article: Delikanli, S., Isik, F., Shabani, F., Baruj, H. D., Taghipour, N. & Demir, H. V. (2021). Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue. Advanced Optical Materials, 9(8), 2002220-. https://dx.doi.org/10.1002/adom.202002220, which has been published in final form at https://doi.org/10.1002/adom.202002220. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Amplified Spontaneous Emission
Blue Optical Gain
spellingShingle Science::Physics
Amplified Spontaneous Emission
Blue Optical Gain
Delikanli, Savas
Isik, Furkan
Shabani, Farzan
Baruj, Hamed Dehghanpour
Taghipour, Nima
Demir, Hilmi Volkan
Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue
description Achieving low-threshold optical gain for solution-processed materials is crucial for their real-life applications and deployment as gain media. However, the realization of low gain threshold in the blue region has shown to be technically an extremely challenging task using colloidal nanocrystals as a result of fast nonradiative Auger rates in smaller nanocrystals. Here, ultralow-threshold blue amplified spontaneous emission (ASE) (≈2.7 µJ cm ) accompanied with a large net modal gain coefficient of 360 cm in the blue enabled by blue-emitting (≈455–465 nm) colloidal quantum rings (QRs) of inverted type-I CdS/CdSe core/crown nanoplatelets (NPLs) is proposed and demonstrated. The synthesized QRs with controlled crown size outperform the best reported ASE thresholds and net modal gain coefficients from the solution-processed materials by ≈2.5- and ≈4-fold, respectively, in the similar blue spectral window. Utilizing this QR architecture, it is also shown that the ASE peak can be spectrally tuned by controlling the lateral size of the crown and hence quantum confinement in the lateral direction. These outstanding results support the prospects of these solution-processed QRs made of 2D hetero-NPLs in the challenging blue region as colloidal gain.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Delikanli, Savas
Isik, Furkan
Shabani, Farzan
Baruj, Hamed Dehghanpour
Taghipour, Nima
Demir, Hilmi Volkan
format Article
author Delikanli, Savas
Isik, Furkan
Shabani, Farzan
Baruj, Hamed Dehghanpour
Taghipour, Nima
Demir, Hilmi Volkan
author_sort Delikanli, Savas
title Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue
title_short Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue
title_full Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue
title_fullStr Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue
title_full_unstemmed Ultralow threshold optical gain enabled by quantum rings of inverted type-I CdS/CdSe core/crown nanoplatelets in the blue
title_sort ultralow threshold optical gain enabled by quantum rings of inverted type-i cds/cdse core/crown nanoplatelets in the blue
publishDate 2021
url https://hdl.handle.net/10356/148384
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