On-demand source of maximally entangled photon pairs using the biexciton-exciton radiative cascade

R. Winik; D. Cogan; Y. Don; I. Schwartz; L. Gantz; E. R. Schmidgall; N. Livneh; R. Rapaport; E. Buks; D. Gershoni

doi:10.1103/PhysRevB.95.235435

On-demand source of maximally entangled photon pairs using the biexciton-exciton radiative cascade

R. Winik, D. Cogan, Y. Don, I. Schwartz, L. Gantz, E. R. Schmidgall, N. Livneh, R. Rapaport, E. Buks, D. Gershoni^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

We perform full time-resolved tomographic measurements of the polarization state of pairs of photons emitted during the radiative cascade of the confined biexciton in a semiconductor quantum dot. The biexciton was deterministically initiated using a π-area pulse into the biexciton two-photon absorption resonance. Our measurements demonstrate that the polarization states of the emitted photon pair are maximally entangled. We show that the measured degree of entanglement depends solely on the temporal resolution by which the time difference between the emissions of the photon pair is determined. A route for fabricating an on-demand source of maximally polarization entangled photon pairs is thereby provided.

Original language	English
Article number	235435
Journal	Physical Review B
Volume	95
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.95.235435
State	Published - 28 Jun 2017

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© 2017 American Physical Society.

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title = "On-demand source of maximally entangled photon pairs using the biexciton-exciton radiative cascade",

abstract = "We perform full time-resolved tomographic measurements of the polarization state of pairs of photons emitted during the radiative cascade of the confined biexciton in a semiconductor quantum dot. The biexciton was deterministically initiated using a π-area pulse into the biexciton two-photon absorption resonance. Our measurements demonstrate that the polarization states of the emitted photon pair are maximally entangled. We show that the measured degree of entanglement depends solely on the temporal resolution by which the time difference between the emissions of the photon pair is determined. A route for fabricating an on-demand source of maximally polarization entangled photon pairs is thereby provided.",

author = "R. Winik and D. Cogan and Y. Don and I. Schwartz and L. Gantz and Schmidgall, {E. R.} and N. Livneh and R. Rapaport and E. Buks and D. Gershoni",

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doi = "10.1103/PhysRevB.95.235435",

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AU - Winik, R.

AU - Cogan, D.

AU - Don, Y.

AU - Schwartz, I.

AU - Gantz, L.

AU - Schmidgall, E. R.

AU - Livneh, N.

AU - Rapaport, R.

AU - Buks, E.

AU - Gershoni, D.

PY - 2017/6/28

Y1 - 2017/6/28

N2 - We perform full time-resolved tomographic measurements of the polarization state of pairs of photons emitted during the radiative cascade of the confined biexciton in a semiconductor quantum dot. The biexciton was deterministically initiated using a π-area pulse into the biexciton two-photon absorption resonance. Our measurements demonstrate that the polarization states of the emitted photon pair are maximally entangled. We show that the measured degree of entanglement depends solely on the temporal resolution by which the time difference between the emissions of the photon pair is determined. A route for fabricating an on-demand source of maximally polarization entangled photon pairs is thereby provided.

AB - We perform full time-resolved tomographic measurements of the polarization state of pairs of photons emitted during the radiative cascade of the confined biexciton in a semiconductor quantum dot. The biexciton was deterministically initiated using a π-area pulse into the biexciton two-photon absorption resonance. Our measurements demonstrate that the polarization states of the emitted photon pair are maximally entangled. We show that the measured degree of entanglement depends solely on the temporal resolution by which the time difference between the emissions of the photon pair is determined. A route for fabricating an on-demand source of maximally polarization entangled photon pairs is thereby provided.

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On-demand source of maximally entangled photon pairs using the biexciton-exciton radiative cascade

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