aqora

Electromagnetically induced transparency in quantum dot biexciton–exciton cascaded scheme

Chunchao Yu

Optical and Quantum ElectronicsNov 29, 201312 citations

Control of excitation dynamics for biexciton-exciton cascade from a single quantum dot

Takumi Harada

The Japan Society of Applied PhysicsFeb 6, 20140 citations

Phase control of optical bistability based biexciton coherence in a quantum dot nanostructure

Seyyed Hossein Asadpour, HAMID RAHIMPOUR SOLEIMANI

Physica B Condensed MatterFeb 2, 201438 citations

Slow light in quantum dot molecule biexciton-exciton cascaded scheme with interdot tunneling

Chunchao Yu, Hai Huang, Liang Zhang

Journal of OpticsFeb 3, 20162 citations

Direct Biexciton Creation with Two-Photon Excitation for Ideal Entangled Photon Pair Emissions in Optically Active Quantum Dots

Hideki Gotoh, Haruki Sanada, Hiroshi Yamaguchi +1 more

A scheme for creating biexcitons without undesirable excitons is demonstrated in GaAs quantum dots (QDs) using an optical pumping method. This scheme utilizes resonant two-photon excitation processes for biexcitons with carefully set excitation conditions. In this scheme, biexcitons are directly created from the ground state while suppressing unnecessary exciton creation. Theoretical analysis confirms that our scheme works in actual QDs. Directly created biexcitons will make ideal entangled photons via cascade photoemission processes in a biexciton–exciton system with the reduction in the number of undesirable single photons from excitons that are not related to the cascade processes.A scheme for creating biexcitons without undesirable excitons is demonstrated in GaAs quantum dots (QDs) using an optical pumping method. This scheme utilizes resonant two-photon excitation processes for biexcitons with carefully set excitation conditions. In this scheme, biexcitons are directly created from the ground state while suppressing unnecessary exciton creation. Theoretical analysis confirms that our scheme works in actual QDs. Directly created biexcitons will make ideal entangled photons via cascade photoemission processes in a biexciton–exciton system with the reduction in the number of undesirable single photons from excitons that are not related to the cascade processes.

Japanese Journal of Applied PhysicsNov 12, 20132 citations

Highly entangled photon pairs generated from the biexciton cascade transition in a quantum-dot–metal-nanoparticle hybrid system

Tara Moradi, M. Bagheri Harouni, M. H. Naderi

The entanglement between photon pairs generated from the biexciton cascade transition in a semiconductor quantum dot located in the vicinity of a metal nanoparticle is theoretically investigated. In the model scheme, the biexciton-exciton and exciton--ground-state transitions are assumed to be coupled to two principal plasmon modes of orthogonal polarizations. For a broad spectral window, because the horizontal and vertical spectra overlap, the biexciton and exciton photons are degenerate in energy. This allows us to overcome the natural splitting between the intermediate exciton states. Moreover, the degree of entanglement depends on the geometrical parameters of the system, i.e., the radius of the metal nanoparticle and the distance between the quantum dot and the nanoparticle. The results reveal that such a hybrid system profoundly modifies the photon entanglement even in the absence of strong coupling between the emitter and the metal nanosphere.The entanglement between photon pairs generated from the biexciton cascade transition in a semiconductor quantum dot located in the vicinity of a metal nanoparticle is theoretically investigated. In the model scheme, the biexciton-exciton and exciton--ground-state transitions are assumed to be coupled to two principal plasmon modes of orthogonal polarizations. For a broad spectral window, because the horizontal and vertical spectra overlap, the biexciton and exciton photons are degenerate in energy. This allows us to overcome the natural splitting between the intermediate exciton states. Moreover, the degree of entanglement depends on the geometrical parameters of the system, i.e., the radius of the metal nanoparticle and the distance between the quantum dot and the nanoparticle. The results reveal that such a hybrid system profoundly modifies the photon entanglement even in the absence of strong coupling between the emitter and the metal nanosphere.

arXiv:1709.04131Physical Review AAug 15, 20176 citations

Controllable optical bistability in the quantum dot biexciton–exciton cascaded scheme

Related papers

Controllable optical bistability in the quantum dot biexciton–exciton cascaded scheme

Related papers