Tunneling Control of Transmission Coefficient and Group Index in a Quantum Dot Nanostructure

Autor: Hamid Reza Hamedi, A. Khaledi-Nasab, H. Ghaforyan

Publikováno v: Advances in Condensed Matter Physics, Vol 2014 (2014)

We theoretically study the transmission and group index properties of the probe field in a four-level quantum dot molecule. It is found that the tunnel coupling plays a very important role in realizing the transmission coefficient of the probe field.

Externí odkaz: https://doaj.org/article/bef32dd8c1e04362b05afa4ac7c90d5a

Azimuthal modulation of electromagnetically induced grating using structured light

Autor: Gediminas Juzeliūnas, Teodora Kirova, Jing Qian, Emmanuel Paspalakis, Seyyed Hossein Asadpour, Hamid Reza Hamedi

Publikováno v: Scientific Reports
Scientific reports, Berlin : Nature research, 2021, vol. 11, iss. 1, art. no. 20721, p. [1-11]
Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)

We propose a theoretical scheme for creating a two-dimensional Electromagnetically Induced Grating in a three-level $$\Lambda $$ Λ -type atomic system interacting with a weak probe field and two simultaneous position-dependent coupling fields—a tw

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df56d1b8133b79bbfe473b3e728ebc5b
https://pubmed.ncbi.nlm.nih.gov/34671063

Ultimate conversion efficiency bound for the forward double-Λ atom-light coupling scheme

Autor: Dionisis, Stefanatos, Athanasios, Smponias, Hamid Reza, Hamedi, Emmanuel, Paspalakis

Publikováno v: Optics letters. 45(21)

We show that for the two widely used configurations of the double

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::825a6c28f018cbfbf843d23c84fdd78c
https://pubmed.ncbi.nlm.nih.gov/33137076

Strongly confined atomic localization by Rydberg coherent population trapping

Autor: Hamid Reza Hamedi, Seyyed Hossein Asadpour, Gediminas Juzeliūnas, Teodora Kirova, Jing Qian, Ning Jia

In this letter we investigate the possibility to attain strongly confined atomic localization using interacting Rydberg atoms in a Coherent Population Trapping (CPT) ladder configuration, where a standing-wave (SW) is used as a coupling field in the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cecd35d2c49617cf94fee5aa4ea22b9c
http://arxiv.org/abs/2006.12750

Tunneling induced two-dimensional phase grating in a quantum well nanostructure via third and fifth orders of susceptibility

Autor: Seyyed Hossein Asadpour, Azar Vafafard, Mostafa Sahrai, Hamid Reza Hamedi

Publikováno v: Scientific reports, London : Nature Publishing Group, 2020, vol. 10, iss. 1, art. no. 7389, p. [1-10]
Scientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
Scientific Reports

We study the nonlinear optical properties in an asymmetric double AlGaAs/GaAs quantum well nanostructure by using an external control field and resonant tunneling effects. It is found that the resonant tunneling can modulate the third-order and fifth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6964f6c041e8b73186c5d414534dc79
https://doi.org/10.1038/s41598-020-64255-2