Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2025 Jan 27;15(1):3418.
doi: 10.1038/s41598-025-86417-w.

Orbital angular momentum light interacted with double quantum dot-metal nanoparticle hybrid structure under spontaneous coherence

Mohanad Ahmed Abdulmahdi  1   2 , Amin Habbeb Al-Khursan  3   4
Affiliations

Orbital angular momentum light interacted with double quantum dot-metal nanoparticle hybrid structure under spontaneous coherence

Mohanad Ahmed Abdulmahdi et al. Sci Rep. .

Abstract

This work studies the generation of the orbital angular momentum (OAM) beam in the double quantum dot-metal nanoparticle (DQD-MNP) system under the application of the OAM beam. First, an analytical model is derived to attain the relations of probe and generated fields as a distance function in the DQD-MNP system under OAM applied field and spontaneously generated coherence (SGC) components. The calculation here is of material property; it differs from others by calculating energy states of the DQDs and the computation of the transition momenta between quantum dot (QD)-QD and QD-wetting layer (WL) transitions. The orthogonalized plane wave (OPW) calculates QD-WL transitions and their momenta. The momentum calculation is essential to specify the Rabi frequency of the input field. Such characteristics are not used in earlier models. The results show that SGC is vital in increasing the generated field. The signal field generated in the DQD-MNP system doubles that from the DQD system alone. So, the DQD-MNP system is preferred to the DQD system. The generated field in the DQD-MNP for the strong coupling DQD-MNP system is higher than that for the weak coupling. Increasing the distance separating the DQD-MNP reduces the generated field. Higher OAM number reduce the generated field at a long distance in the device. The model is then extended to study the effect of incoherent pumping ([Formula: see text]) and the relations are modified to cover this part. The results show that [Formula: see text] reduces the generated field. While the results that compare the weak and strong coupling appear for the first, others compare well to the literature.

Keywords: Double quantum dot; Metal nanoparticle; Orbital angular momentum.

PubMed Disclaimer

Conflict of interest statement

Declarations. Competing interests: The authors declare no competing interests. Consent to participate: All the authors consented to participate. Consent for publication: All the authors consent to publication.

Figures

Fig. 1
Fig. 1
The hybrid WL-DQD-MNP structure. Note that formula image and formula image are DQD radii, formula image is the DQD-MNP separating distance, and formula image is the MNP radius.
Fig. 2
Fig. 2
DQD-MNP system: (a) DQD-MNP under the generated and OAM probe fields, (b) the SGC contribution.
Fig. 3
Fig. 3
Normalized generated field versus normalized distance at three SGC ratios.
Fig. 4
Fig. 4
Normalized probe field versus normalized distance at three SGC ratios.
Fig. 5
Fig. 5
Normalized generated probe field versus normalized distance from the vortex at three OAM numbers.
Fig. 6
Fig. 6
The behavior of the fields along the normalized distance in the DQD-MNP system at strong coupling (blue dotted), DQD-MNP system at weak coupling (red-dotted), and DQD system (black-dotted): (a) normalized generated field. (b) normalized probe field.
Fig. 7
Fig. 7
The behavior of the generated field along the normalized distance in the DQD-MNP system at strong coupling (blue) and DQD-MNP system at weak coupling (red and black).
Fig. 8
Fig. 8
The effect of the optical depth at three incoherent pumpings on the normalized generated field.
See this image and copyright information in PMC

Similar articles

See all similar articles

References

    1. Moretti, D., Felinto, D. & Tabosa, J. W. R. Collapses and revivals of stored orbital angular momentum of light in a cold-atom ensemble. Phys. Rev. A79, 023825 (2009).
    1. Hamedi, H., Reza, Ruseckas, J., Paspalakis, E. & Juzeliunas, G. Transfer of optical vortices in coherently prepared media. Phys. Rev. A99, 033812 (2019).
    1. Asadpour, S. H. et al. Azimuthal modulation of electromagnetically induced grating using structured light. Sci. Rep.11, 20721 (2021). - PMC - PubMed
    1. Wang, T., Zhao, L., Jiang, L. & Yelin, S. F. Diffusion-induced decoherence of stored optical vortices. Phys. Rev. A77, 043815 (2008).
    1. Hamedi, H., Reza, Ruseckas, J. & Juzeliunas, G. Exchange of optical vortices using an electromagnetically-induced-transparency–based four-wave-mixing setup. Phys. Rev. A98, 013840 (2018).

LinkOut - more resources