Photon bunching in cathodoluminescence induced by indirect electron excitation

Iyer, Vasudevan; Roccapriore, Kevin M.; Ng, Jacob; Srijanto, Bernadeta; Lingerfelt, David B.; Lawrie, Benjamin J.

doi:10.1039/d3nr00376k

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…[26,[44][45][46]55] To fully understand the observations, more theoretical efforts are needed, here we note a new theoretical work about superbunching emission in the cathodoluminescence (CL) process as CL usually gives huge g (2) (0). [56][57][58] Recently, Yuge et al [59] proposed a model of quantum master equation to describe the dynamics of multiple emitters in CL. Their model successfully reproduces several features of CL, particularly the superbunching and decaying behavior of g (2) (𝜏).…”

Section: Discussionmentioning

confidence: 99%

Giant Superbunching Emission from Mesoscopic Perovskite Emitter Clusters

Qiang,

Cai,

Rasmita

et al. 2023

Advanced Optical Materials

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Photon superbunching, as a crucial resource for photonic quantum technologies, is investigated in several systems. This phenomenon can be induced by both coherent collective spontaneous processes such as superfluorescence and superradiance, and cascaded emission. Although superbunching emission induced by superfluorescence and cascaded emission is demonstrated recently in perovskite quantum dot (QD) superlattice and single perovskite QD, the effect itself is not that strong, especially in the former case with a second‐order photon correlation g(2)(0) only slightly larger than 2. Here, the superbunching emission from mesoscopic CsPbBr3 emitter clusters is reported. The higher temperature and excitation power are found to suppress the superbunching effect significantly. Compared with the former results in the literature, under the same experimental conditions, that is, temperature and excitation power, much larger g(2)(0) with the maximum value of 21 being achieved at 1.6 K with an excitation power of 0.1 µW is observed. The discoveries here improve the understanding of superbunching emission in perovskite‐based materials and will enable their application in developing multi‐photon light sources for photonic quantum technologies.

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Section: Discussionmentioning

confidence: 99%

Giant Superbunching Emission from Mesoscopic Perovskite Emitter Clusters

Qiang,

Cai,

Rasmita

et al. 2023

Advanced Optical Materials

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“…The observed CL bunching is consistent with previous reports of the impulsive high-energy electron excitation of ensembles of emitters. 21,25,26 Figure 5c shows a PL spectrum acquired on pillar A after the CL measurements with an incident power density of 1 nW/μm 2 , where this 627 nm emitter is also observed. However, the PL emission shows weak antibunching with g (2) (0) = 0.59 ± 0.06, and a time constant of 0.48 ns (Figure 5d) in contrast to the bunching and slower dynamics observed in CL.…”

Section: Dft Calculations Of Band Structures Of Biaxially Tensile-str...mentioning

confidence: 99%

“…Exciton diffusion lengths in unstrained monolayers − have been reported to be less than 1 μm, and they can be substantially smaller (i.e., <200 nm) when exciton funneling is induced by nanoscale strain. , Near-field characterization tools with spatial resolution below the diffraction limit are increasingly needed to understand these effects. For example, cathodoluminescence (CL) − microscopy has been used to study defect-related SPEs in 2D hBN. Tip-enhanced photoluminescence (PL) − and scanning tunneling luminescence microscopies have been used to study localized emitters in quantum dots, carbon nanotubes, and monolayer WSe 2 .…”

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confidence: 99%