Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/147324
Title: Room temperature light-mediated long-range coupling of excitons in perovskites
Authors: Krisnanda, Tanjung
Zhang, Qiannan
Dini, Kevin
Giovanni, David
Liew, Timothy Chi Hin
Sum, Tze Chien
Keywords: Science::Physics
Science::Physics::Optics and light
Issue Date: 2021
Source: 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
Journal: Advanced Optical Materials 
Abstract: 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.
URI: https://hdl.handle.net/10356/147324
ISSN: 2195-1071
DOI: 10.1002/adom.202001835
Schools: School of Physical and Mathematical Sciences 
Organisations: 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
Rights: 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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