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|Title:||Low-threshold lasing from copper-doped CdSe colloidal quantum wells||Authors:||Yu, Junhong
McBride, James R.
Sum, Tze Chien
Demir, Hilmi Volkan
Engineering::Electrical and electronic engineering
|Issue Date:||2021||Source:||Yu, J., Sharma, M., Li, M., Delikanli, S., Sharma, A., Muhammad Taimoor, Altintas, Y., McBride, J. R., Kusserow, T., Sum, T. C., Demir, H. V. & Dang, C. (2021). Low-threshold lasing from copper-doped CdSe colloidal quantum wells. Laser and Photonics Reviews, 15(6), 2100034-. https://dx.doi.org/10.1002/lpor.202100034||Project:||NRFI2016-08
|Journal:||Laser and Photonics Reviews||Abstract:||Transition metal doped colloidal nanomaterials (TMDCNMs) have recently attracted attention as promising nano-emitters due to dopant-induced properties. However, despite ample investigations on the steady-state and dynamic spectroscopy of TMDCNMs, experimental understandings of their performance in stimulated emission regimes are still elusive. Here, the optical gain properties of copper-doped CdSe colloidal quantum wells (CQWs) are systemically studied with a wide range of dopant concentration for the first time. This work demonstrates that the amplified spontaneous emission (ASE) threshold in copper-doped CQWs is a competing result between the biexciton formation, which is preferred to achieve population inversion, and the hole trapping which stymies the population inversion. An optimum amount of copper dopants enables the lowest ASE threshold of ≈7 µJ cm−2, about 8-fold reduction from that in undoped CQWs (≈58 µJ cm−2) under sub-nanosecond pulse excitation. Finally, a copper-doped CQW film embedded in a vertical cavity surface-emitting laser (VCSEL) structure yields an ultralow lasing threshold of 4.1 µJ cm−2. Exploiting optical gain from TMDCNMs may help to further boost the performance of colloidal-based lasers.||URI:||https://hdl.handle.net/10356/152583||ISSN:||1863-8880||DOI:||10.1002/lpor.202100034||Rights:||This is the peer reviewed version of the following article: Yu, J., Sharma, M., Li, M., Delikanli, S., Sharma, A., Muhammad Taimoor, Altintas, Y., McBride, J. R., Kusserow, T., Sum, T. C., Demir, H. V. & Dang, C. (2021). Low-threshold lasing from copper-doped CdSe colloidal quantum wells. Laser and Photonics Reviews, 15(6), 2100034-, which has been published in final form at https://doi.org/10.1002/lpor.202100034. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.||Fulltext Permission:||embargo_20220707||Fulltext Availability:||With Fulltext|
|Appears in Collections:||EEE Journal Articles|
SPMS Journal Articles
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