Exciton states in InGaAsP/InP core–shell quantum dots under an external electric field

Hu, Min; Wang, Hailong; Gong, Qihuang; Wang, Shumin

doi:10.1007/s10825-019-01404-5

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…Concerning the EF effect on excitons, Heyn et al studied the states of excitons in conical QDs under applied EF and B [55]. The EF effect on exciton states in CSDQs has been investigated for CdSe/ZnS and InGaAsP/InP materials [56,57]. These studies have shown a profound dependency between the excitonic properties and the applied EF.…”

Section: Introductionmentioning

confidence: 99%

Intense Laser Field Effect on the Photo-Ionization Cross-Section of the First Exciton Transition in a Core/Shell Quantum Dot Submitted to an Applied Electric Field

et al. 2023

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In the current work, we study the intense laser pulse influences on the behaviors of the first excitonic transition in a core/shell quantum dot submitted to an electric field. Therefore, the exciton binding energy and the mean distance between the correlated electron–hole pair are discussed, considering the electric field and laser strength. Our calculations show that both external fields play significant repulsive effects. Through their effects, they oppose the attractive nature of the Coulomb potential between the correlated pair, which decreases the excitonic binding energy. We also analyze the dissociation process by determining the photo-ionization cross-section (PICS). Our findings show that the peaks of the PICS redshift when the shell thickness b−a increases. For a given core radius, the laser and electric field induce a shift toward the low-energy region for the PICS; this displacement is more pronounced for the laser case. Our study also compares simple quantum dots and core/shell quantum dots to show the effect of the inner radius on the obtained results. Our theoretical results can lead to promising applications of exciton-based devices controlled by sizes and external fields.

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Section: Introductionmentioning

confidence: 99%