Molecular states of laterally coupled quantum dots under electric fields

Teofilo Corredor, Carlos; Gutiérrez, Willian
June 2014
Revista Facultad de Ingenieria Universidad de Antioquia;jun2014, Issue 71, p17
Academic Journal
The states of a single electron trapped in two laterally coupled quantum dots are studied theoretically in the framework of the effective mass and envelope function approximations. The electron tunneling between dots is studied by varying of inter-dot distance and we showed that the lateral quantum coupling between them allows the formation of molecular-like states, which exhibit similar characteristics to those of a molecule H2+. The effect of an in-plane electric field on the energy spectrum is analyzed and our results reveal that the wavelength of photons emitted from the system can be tuned by simply applying a low-intensity electric field. This latter feature is consistent with experimental observations.


Related Articles

  • Single photon sources: Silicon magic. Aharonovich, Igor // Nature Photonics;Nov2014, Vol. 8 Issue 11, p818 

    The article discusses research on silicon vacancy defect in diamonds that generate single photons which is a requirement for quantum photonics and computing. Topics discussed include semiconductor quantum dots and negatively charged nitrogen vacancy defects in diamonds, presence of ...

  • Size dependence of two-photon absorption in semiconductor quantum dots. Dakovski, Georgi L.; Shan, Jie // Journal of Applied Physics;Jul2013, Vol. 114 Issue 1, p014301 

    Quantum confinement plays an important role in the optical properties of semiconductor quantum dots (QDs). In this work, we combine experiment and modeling to systematically investigate the size dependence of the degenerate two-photon absorption (TPA) of below-band-gap radiation in CdSe QDs. The...

  • Single-photon emission at 1.5 μm from an InAs/InP quantum dot with highly suppressed multi-photon emission probabilities. Miyazawa, T.; Takemoto, K.; Nambu, Y.; Miki, S.; Yamashita, T.; Terai, H.; Fujiwara, M.; Sasaki, M.; Sakuma, Y.; Takatsu, M.; Yamamoto, T.; Arakawa, Y. // Applied Physics Letters;9/26/2016, Vol. 109 Issue 13, p132106-1 

    We have demonstrated highly pure single-photon emissions from an InAs/InP quantum dot at the wavelength of 1.5 μm. By applying quasi-resonant excitation, one exciton is deterministically generated in an excited state, which then relaxes to the exciton ground state before recombining to emit a...

  • A Disguised Switch for Two-Qubit Gates of a Hybrid Quantum Processing Unit. Pei, Pei; Guo, Yan-Qing; Zhang, Feng-Yang; Jin, Jia-Sen // International Journal of Theoretical Physics;Feb2015, Vol. 54 Issue 2, p657 

    The key mechanism which enables two-qubit operations of a hybrid quantum processing unit for hybrid quantum computing is demonstrated. A scheme which realizes a disguised switch for two-qubit gating is proposed, combining external magnetic field control, quantum dot sample tuning, and assisted...

  • Charge state hysteresis in semiconductor quantum dots. Yang, C. H.; Rossi, A.; Lai, N. S.; Leon, R.; Lim, W. H.; Dzurak, A. S. // Applied Physics Letters;11/5/2014, Vol. 105 Issue 18, p1 

    Semiconductor quantum dots provide a two-dimensional analogy for real atoms and show promise for the implementation of scalable quantum computers. Here, we investigate the charge configurations in a silicon metal-oxide-semiconductor double quantum dot tunnel coupled to a single reservoir of...

  • Polarization properties and disorder effects in H3 photonic crystal cavities incorporating site-controlled, high-symmetry quantum dot arrays. Surrente, Alessandro; Felici, Marco; Gallo, Pascal; Dwir, Benjamin; Rudra, Alok; Biasiol, Giorgio; Kapon, Eli // Applied Physics Letters;7/22/2015, Vol. 107 Issue 3, p1 

    We report on the effects of optical disorder on breaking the symmetry of the cavity modes of H3 photonic crystal cavities incorporating site-controlled pyramidal quantum dots (QDs) as the internal light source. The high in-plane symmetry of the polarization states of the pyramidal QDs simplifies...

  • Biophotonics: Intracellular tracking. Graydon, Oliver // Nature Photonics;Oct2014, Vol. 8 Issue 10, p747 

    The article discusses research on the intracellular tracking ability of fluorescent semiconductor quantum dots that was conducted by Aaron Keller and colleagues, published in the 2014 issue of "Advanced Functional Materials."

  • Erratum: Parity effect of bipolar quantum Hall edge transport around graphene antidots. Matsuo, Sadashige; Nakaharai, Shu; Komatsu, Katsuyoshi; Tsukagoshi, Kazuhito; Moriyama, Takahiro; Ono, Teruo; Kobayashi, Kensuke // Scientific Reports;8/7/2015, p12591 

    A correction to the article "Parity effect of bipolar quantum Hall edge transport around graphene antidots" that was published in the 2015 issue of the periodical, is presented.

  • g-factor anisotropy in nanowire-based InAs quantum dots. d'Hollosy, Samuel; Fábián, Gábor; Baumgartner, Andreas; Nygård, Jesper; Schönenberger, Christian // AIP Conference Proceedings;Dec2013, Vol. 1566 Issue 1, p359 

    The determination and control of the electron g-factor in semiconductor quantum dots (QDs) are fundamental prerequisites in modern concepts of spintronics and spin-based quantum computation. We study the dependence of the gfactor on the orientation of an external magnetic field in quantum dots...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics