January 2022
Spotlight Summary by Alessandro Veltri
Photocurrent in plasmonic nanofibers
This work presents a theoretical description for the photoresponse and photocurrent in nanofibers embedding metal nanoparticles and quantum dots in their core.
Exploiting the full potential of such composite fibers for applications in optoelectronics requires a suitable description of their light-to-electricity conversion behavior. Striving for that, the authors have integrated (i) the transfer matrix method to calculate the bound states confined in the fiber, (ii) the quantum mechanical perturbation theory to describe the dipole-dipole interaction of the embedded nano-objects involved, and (iii) the density matrix method to account for the photoresponse coefficient and the photocurrent. The proposed theory thus manages to cover all the foundations of these novel designs.
Through this approach, the authors highlight interesting findings on about when photocurrent is quenched, and its coupling with the dipole-dipole interaction. The paper also presents a comparison with experimental results from an external reference. The fit with the experimental data is strikingly accurate and allows for a better understanding of the physics at play.
The discussed method opens possibilities for new, optimized experimental designs aimed to enhance the most enthralling aspects of these devices.
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Exploiting the full potential of such composite fibers for applications in optoelectronics requires a suitable description of their light-to-electricity conversion behavior. Striving for that, the authors have integrated (i) the transfer matrix method to calculate the bound states confined in the fiber, (ii) the quantum mechanical perturbation theory to describe the dipole-dipole interaction of the embedded nano-objects involved, and (iii) the density matrix method to account for the photoresponse coefficient and the photocurrent. The proposed theory thus manages to cover all the foundations of these novel designs.
Through this approach, the authors highlight interesting findings on about when photocurrent is quenched, and its coupling with the dipole-dipole interaction. The paper also presents a comparison with experimental results from an external reference. The fit with the experimental data is strikingly accurate and allows for a better understanding of the physics at play.
The discussed method opens possibilities for new, optimized experimental designs aimed to enhance the most enthralling aspects of these devices.
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Article Information
Photocurrent in plasmonic nanofibers
Mahi R. Singh, Shashankdhwaj Parihar, Sergey Yastrebov, and Vladimir Ivanov-Omskii
J. Opt. Soc. Am. B 39(1) 248-257 (2022) View: Abstract | HTML | PDF