"Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing

Semiconductor colloidal quantum wells (CQWs) have emerged as a promising class of gain materials to be used in colloidal lasers. Although low gain thresholds are achieved, the required high gain coefficient levels are barely met for the applications of electrically-driven lasers which entails a very...

Full description

Saved in:
Bibliographic Details
Main Authors: Isik, Furkan, Delikanli, Savas, Durmusoglu, Emek Goksu, Isik, Ahmet Tarik, Shabani, Farzan, Baruj, Hamed Dehghanpour, Demir, Hilmi Volkan
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2024
Subjects:
Online Access:https://hdl.handle.net/10356/174803
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-174803
record_format dspace
spelling sg-ntu-dr.10356-1748032024-04-15T15:37:05Z "Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing Isik, Furkan Delikanli, Savas Durmusoglu, Emek Goksu Isik, Ahmet Tarik Shabani, Farzan Baruj, Hamed Dehghanpour Demir, Hilmi Volkan School of Physical and Mathematical Sciences School of Electrical and Electronic Engineering School of Materials Science and Engineering Engineering All colloidal lasers Giant colloidal quantum wells Semiconductor colloidal quantum wells (CQWs) have emerged as a promising class of gain materials to be used in colloidal lasers. Although low gain thresholds are achieved, the required high gain coefficient levels are barely met for the applications of electrically-driven lasers which entails a very thin gain matrix to avoid charge injection limitations. Here, "giant" CdSe@CdS colloidal quantum well heterostructures of 9.5 to 17.5 monolayers (ML) in total with corresponding vertical thickness from 3.0 to 5.8 nm that enable record optical gain is shown. These CQWs achieve ultra-high material gain coefficients up to ≈140 000 cm-1 , obtained by systematic variable stripe length (VSL) measurements and independently validated by transient absorption (TA) measurements, owing to their high number of states. This exceptional gain capacity is an order of magnitude higher than the best levels reported for the colloidal quantum dots. From the dispersion of these quantum wells, low threshold amplified spontaneous emission in water providing an excellent platform for optofluidic lasers is demonstrated. Also, employing these giant quantum wells, whispering gallery mode (WGM) lasing with an ultra-low threshold of 8 µJ cm-2 is demonstrated. These findings indicate that giant CQWs offer an exceptional platform for colloidal thin-film lasers and in-solution lasing applications. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) Published version The authors gratefully acknowledge the financial support in part from the Singapore Agency for Science, Technology and Research (A*STAR) MTC program under grant number M21J9b0085, Ministry of Education,Singapore, under its Academic Research Fund Tier 1 (MOE-RG62/20),and in part from TUBITAK 119N343, 121C266, 121N395 and 20AG001.H.V.D. also acknowledges support from TUBA and TUBITAK 2247-A National Leader Researchers Program (121C266). 2024-04-12T03:17:06Z 2024-04-12T03:17:06Z 2024 Journal Article Isik, F., Delikanli, S., Durmusoglu, E. G., Isik, A. T., Shabani, F., Baruj, H. D. & Demir, H. V. (2024). "Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing. Small. https://dx.doi.org/10.1002/smll.202309494 1613-6810 https://hdl.handle.net/10356/174803 10.1002/smll.202309494 38441357 2-s2.0-85186624127 en M21J9b0085 MOE-RG62/20 Small © 2024 The Authors. Small published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
All colloidal lasers
Giant colloidal quantum wells
spellingShingle Engineering
All colloidal lasers
Giant colloidal quantum wells
Isik, Furkan
Delikanli, Savas
Durmusoglu, Emek Goksu
Isik, Ahmet Tarik
Shabani, Farzan
Baruj, Hamed Dehghanpour
Demir, Hilmi Volkan
"Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing
description Semiconductor colloidal quantum wells (CQWs) have emerged as a promising class of gain materials to be used in colloidal lasers. Although low gain thresholds are achieved, the required high gain coefficient levels are barely met for the applications of electrically-driven lasers which entails a very thin gain matrix to avoid charge injection limitations. Here, "giant" CdSe@CdS colloidal quantum well heterostructures of 9.5 to 17.5 monolayers (ML) in total with corresponding vertical thickness from 3.0 to 5.8 nm that enable record optical gain is shown. These CQWs achieve ultra-high material gain coefficients up to ≈140 000 cm-1 , obtained by systematic variable stripe length (VSL) measurements and independently validated by transient absorption (TA) measurements, owing to their high number of states. This exceptional gain capacity is an order of magnitude higher than the best levels reported for the colloidal quantum dots. From the dispersion of these quantum wells, low threshold amplified spontaneous emission in water providing an excellent platform for optofluidic lasers is demonstrated. Also, employing these giant quantum wells, whispering gallery mode (WGM) lasing with an ultra-low threshold of 8 µJ cm-2 is demonstrated. These findings indicate that giant CQWs offer an exceptional platform for colloidal thin-film lasers and in-solution lasing applications.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Isik, Furkan
Delikanli, Savas
Durmusoglu, Emek Goksu
Isik, Ahmet Tarik
Shabani, Farzan
Baruj, Hamed Dehghanpour
Demir, Hilmi Volkan
format Article
author Isik, Furkan
Delikanli, Savas
Durmusoglu, Emek Goksu
Isik, Ahmet Tarik
Shabani, Farzan
Baruj, Hamed Dehghanpour
Demir, Hilmi Volkan
author_sort Isik, Furkan
title "Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing
title_short "Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing
title_full "Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing
title_fullStr "Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing
title_full_unstemmed "Giant" colloidal quantum well heterostructures of CdSe@CdS core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing
title_sort "giant" colloidal quantum well heterostructures of cdse@cds core@shell nanoplatelets from 9.5 to 17.5 monolayers in thickness enabling ultra-high gain lasing
publishDate 2024
url https://hdl.handle.net/10356/174803
_version_ 1800916156585869312