Room temperature light-mediated long-range coupling of excitons in perovskites
Perovskites have been the focus of attention due to their multitude of outstanding optoelectronic properties and structural versatility. 2D halide perovskites such as (C6H5C2H4NH3)2PbI4, or simply PEPI, form natural multiple quantum wells with enhanced light–matter interactions, making them attracti...
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sg-ntu-dr.10356-1473242023-02-28T19:27:38Z Room temperature light-mediated long-range coupling of excitons in perovskites Krisnanda, Tanjung Zhang, Qiannan Dini, Kevin Giovanni, David Liew, Timothy Chi Hin Sum, Tze Chien School of Physical and Mathematical Sciences MajuLab, International Joint Research Unit UMI 3654, CNRS, Universit´e C^ote d’Azur, Sorbonne Universit´e, National University of Singapore, Nanyang Technological University, Singapore Science::Physics Science::Physics::Optics and light Exciton Mode Splitting Lead Halide Perovskites Perovskites have been the focus of attention due to their multitude of outstanding optoelectronic properties and structural versatility. 2D halide perovskites such as (C6H5C2H4NH3)2PbI4, or simply PEPI, form natural multiple quantum wells with enhanced light–matter interactions, making them attractive systems for further investigation. This work reports tunable splitting of exciton modes in PEPI resulting from strong light–matter interactions, manifested as multiple dips (modes) in the reflection spectra. While the origin of the redder mode is well understood, that for the bluer dip at room temperature is still lacking. Here, it is revealed that the presence of the multiple modes originates from an indirect coupling between excitons in different quantum wells. The long‐range characteristic of the mediated coupling between excitons in distant quantum wells is also demonstrated in a structure design along with its tunability. Moreover, a device architecture involving an end silver layer enhances the two excitonic modes and provides further tunability. Importantly, this work will motivate the possibility of coupling of the excitonic modes with a confined light mode in a microcavity to produce multiple exciton‐polariton modes. Ministry of Education (MOE) National Research Foundation (NRF) Accepted version T.K., Q.Z., K.D., and D.G. contributed equally to this work. T.K., D.G., T.C.H.L., and T.C.S. acknowledge support from the Singapore Ministry of Education under its AcRF Tier 2 grant MOE2017-T2-1-001. Q.Z. was supported by the Singapore Ministry of Education under its AcRF Tier 2 grant MOE2017-T2-2-002. K.D. was supported by the Singapore Ministry of Education under its AcRF Tier 2 grant MOE2019-T2-1-004. T.C.S. also acknowledges support from the Singapore National Research Foundation NRF-NRFI-2018-04 and AcRF Tier 2 grant MOE2019-T2-1-006. 2021-03-29T02:44:16Z 2021-03-29T02:44:16Z 2021 Journal Article Krisnanda, T., Zhang, Q., Dini, K., Giovanni, D., Liew, T. C. H. & Sum, T. C. (2021). Room temperature light-mediated long-range coupling of excitons in perovskites. Advanced Optical Materials, 2001835-. https://dx.doi.org/10.1002/adom.202001835 2195-1071 https://hdl.handle.net/10356/147324 10.1002/adom.202001835 2001835 en Advanced Optical Materials This is the peer reviewed version of the following article: Krisnanda, T., Zhang, Q., Dini, K., Giovanni, D., Liew, T. C. H. & Sum, T. C. (2021). Room temperature light-mediated long-range coupling of excitons in perovskites. Advanced Optical Materials, 2001835-. https://dx.doi.org/10.1002/adom.202001835, which has been published in final form at https://doi.org/10.1002/adom.202001835. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf |
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Science::Physics Science::Physics::Optics and light Exciton Mode Splitting Lead Halide Perovskites Krisnanda, Tanjung Zhang, Qiannan Dini, Kevin Giovanni, David Liew, Timothy Chi Hin Sum, Tze Chien Room temperature light-mediated long-range coupling of excitons in perovskites |
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Perovskites have been the focus of attention due to their multitude of outstanding optoelectronic properties and structural versatility. 2D halide perovskites such as (C6H5C2H4NH3)2PbI4, or simply PEPI, form natural multiple quantum wells with enhanced light–matter interactions, making them attractive systems for further investigation. This work reports tunable splitting of exciton modes in PEPI resulting from strong light–matter interactions, manifested as multiple dips (modes) in the reflection spectra. While the origin of the redder mode is well understood, that for the bluer dip at room temperature is still lacking. Here, it is revealed that the presence of the multiple modes originates from an indirect coupling between excitons in different quantum wells. The long‐range characteristic of the mediated coupling between excitons in distant quantum wells is also demonstrated in a structure design along with its tunability. Moreover, a device architecture involving an end silver layer enhances the two excitonic modes and provides further tunability. Importantly, this work will motivate the possibility of coupling of the excitonic modes with a confined light mode in a microcavity to produce multiple exciton‐polariton modes. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Krisnanda, Tanjung Zhang, Qiannan Dini, Kevin Giovanni, David Liew, Timothy Chi Hin Sum, Tze Chien |
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Article |
author |
Krisnanda, Tanjung Zhang, Qiannan Dini, Kevin Giovanni, David Liew, Timothy Chi Hin Sum, Tze Chien |
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Krisnanda, Tanjung |
title |
Room temperature light-mediated long-range coupling of excitons in perovskites |
title_short |
Room temperature light-mediated long-range coupling of excitons in perovskites |
title_full |
Room temperature light-mediated long-range coupling of excitons in perovskites |
title_fullStr |
Room temperature light-mediated long-range coupling of excitons in perovskites |
title_full_unstemmed |
Room temperature light-mediated long-range coupling of excitons in perovskites |
title_sort |
room temperature light-mediated long-range coupling of excitons in perovskites |
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2021 |
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https://hdl.handle.net/10356/147324 |
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1759856613344149504 |