Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.224
Publication date: 18th December 2023
The search for material platforms that ensure low cost, ease of fabrication, usability (room temperature) and nonlinearity in the same device is a serious challenge for today's photonics. Our work presents a first step towards a major breakthrough in the field of perovskite integrated photonics. For this purpose, we developed a versatile, template-assisted method for fabricating perovskite microstructures of any arbitrary, pre-defined shape. Our structures demonstrate waveguiding capabilities and facilitate the formation of spatially extended condensates of coherent exciton-polaritons.
Our microwires, characterized by their ability to bend without compromising optical quality, are formed from CsPbBr3 crystals and can be deposited on any substrate, enhancing compatibility with existing photonic devices. Notably, our method overcomes the limitations of traditional waveguiding setups by eliminating the need for extrinsic cavity mirrors. Our approach significantly simplifies the fabrication process, making on-chip polaritonic devices more accessible and cost-effective.
We demonstrate polariton lasing from the interfaces and corners of the microwires, with large blueshifts observed with excitation power. The high mutual coherence between different edge and corner lasing signals, evidenced in the far-field photoluminescence and angle-resolved spectroscopy, indicates the formation of a coherent, extended over macroscopic distance polariton condensate. This condensate is capable of propagating over long distances within the wires and even coupling between neighbouring wires through air-gaps.
The simplicity and scalability of our platform, combined with its compatibility with standard photonic components, pave the way for future large-scale, integrated polaritonic circuitry. Our findings not only demonstrate the potential of CsPbBr3 perovskites in photonic applications but also provide a more accessible path for the development of advanced on-chip optical devices with build-in nonlinearities.
This work was supported by the National Science Center, Poland, under the projects: 2022/47/B/ST3/02411, 2021/43/B/ST3/00752, 2019/35/N/ST3/01379 and European Union’s Horizon 2022 program, through a Pathfinder Challenges grant No. 101115575 (Q-ONE). H.S. acknowledges the project No. 2022/45/P/ST3/00467 co-funded by the Polish National Science Centre and the European Union Framework Programme for Research and Innovation Horizon 2020 under the Marie Skłodowska-Curie grant agreement No. 945339. A.O. acknowledges support from the Foundation for Polish Science (FNP). This work was supported by the joint bilateral project ’Novel photonic platform for neuromorphic computing’ Italy MAECI - Poland NAWA PPN/BIT/2021/1/ 00124/U/00001. M.E., A.Sz. K.B acknowledge the support by the statutory funds of the Łukasiewicz Research Network– Institute of Microelectronics and Photonics.
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