Tunable phononic coupling in excitonic quantum emitters

Ripin, Adina; Peng, Ruoming; Zhang, Xiaowei; Chakravarthi, Srivatsa; He, Minhao; Xu, Xiaodong; Fu, Kai-Mei C.; Cao, Ting; Li, Mo

doi:10.1038/s41565-023-01410-6

Cited by 11 publications

(7 citation statements)

References 57 publications

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“…Also, continuously decreasing the power would not improve the g (2) (0). As inhomogeneous linewidth broadening caused by multiple complicated sources, such as electron–phonon coupling, , and defect-related non-radiative decay, − will play a significant role in the SPE quality, leading to the decrease of the g (2) (0). In addition to the power-dependent g (2) (0), we further performed the spectral weight analysis in Supplementary Figure S12i.…”

Section: Resultsmentioning

confidence: 99%

Deterministic Localization of Strain-Induced Single-Photon Emitters in Multilayer GaSe

et al. 2023

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The nanoscale strain has emerged as a powerful tool for controlling single-photon emitters (SPEs) in atomically thin transition metal dichalcogenides (TMDCs). However, quantum emitters in monolayer TMDCs are typically unstable in ambient conditions. Multilayer TMDCs could be a solution, but they suffer from low quantum efficiency, resulting in low brightness of the SPEs. Here, we report the deterministic spatial localization of strain-induced SPEs in multilayer GaSe by nanopillar arrays. The strain-controlled quantum confinement effect introduces well-isolated sub-bandgap photoluminescence and corresponding suppression of the broad band edge photoluminescence. Clear photon-antibunching behavior is observed from the quantum dot-like GaSe sub-bandgap exciton emission at 3.5 K. The strain-dependent confinement potential and the brightness are found to be strongly correlated, suggesting a promising route for tuning and controlling SPEs. The comprehensive investigations of strain-engineered GaSe SPEs provide a solid foundation for the development of 2D devices for quantum photonic technologies.

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Section: Resultsmentioning

confidence: 99%

Deterministic Localization of Strain-Induced Single-Photon Emitters in Multilayer GaSe

et al. 2023

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“…The long-lived coherent phonons together with the excitons in two-dimensional semiconductor materials can provide a new way to explore the exciton−phonon coupling effect. 109 Acoustic vibrations in nanoresonators have also demonstrated significant coupling with the intrinsic vibrational modes of biological particles, as shown in Figure 6. 93 Upon the deposition of a single Staphylococcus epidermidis bacterial cell onto GaAs optomechanical resonators, distinct alterations in the radial breathing modes of the resonators are observed.…”

Section: Coherent Acoustic Vibrational Spectrum Of Coupled Nanoresona...mentioning

confidence: 99%

“…By considering the extensive family of two-dimensional materials, with their diverse properties and arrangements akin to a “lego-type” assembly, this model offers valuable insights for the design and development of a multitude of acoustic cavities with substantial coupling strength. The long-lived coherent phonons together with the excitons in two-dimensional semiconductor materials can provide a new way to explore the exciton–phonon coupling effect …”

Section: Coherent Acoustic Vibrational Spectrum Of Coupled Nanoresona...mentioning

confidence: 99%

Coherent Acoustic Vibrational Spectrum of Single and Coupled Nanoresonators

Yu,

Wang

2024

J. Phys. Chem. C

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Coherent acoustic vibrations of nanoresonators have attracted considerable attention, owing to their rich phonon spectra. Understanding and manipulating coherent acoustic vibrational spectra in nanoresonators hold considerable promise for diverse technological applications ranging from acoustic imaging to biomechanics. This Perspective provides an exploration of coherent acoustic phonon spectra observed in both single and coupled nanoresonators using time-resolved measurements. We discuss the vibrational characteristics of single nanoresonators, concentrating on the acoustic frequency, lifetime, vibrational amplitude, and phase. Additionally, our discussion extends to vibrational spectra in coupled nanoresonators with a specific focus on elucidating the coupling mechanisms. Finally, we highlight both the opportunities and the challenges in coherent control of the vibrational spectra of nanoresonators.

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“…30 In type II, in particular p–n junction, TMDO heterostructures, generally the PL emission peak quenches for individual layers; however, recently an extra ILX emission peak from the NIR to IR range has been observed. Due to their spatially indirect nature, interlayer excitons possess long-lifetimes, attributed to the reduced overlap between electron and hole wavefunctions, 31,32 extended spatial coherence of the excitons, 33 quantum emitter, 34 and high-temperature exciton condensate. 35,36 Most recently, Thompson et al , has unveiled, in both theoretical models and experimental observations, distinct features of the entire intra- and interlayer exciton landscape in the PL spectra.…”

Section: Introductionmentioning

confidence: 99%