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Photon echoes produced by switching electric fields.

A L Alexander1, J J Longdell, M J Sellars

  • 1Laser Physics Centre, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia.

Physical Review Letters
|February 21, 2006
PubMed
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Researchers created photon echoes in a crystal using electric fields. This breakthrough in optical physics could be used for quantum memory applications.

Area of Science:

  • Quantum optics
  • Solid-state physics
  • Materials science

Background:

  • Photon echoes are coherent optical transients.
  • Europium-doped crystals are promising for quantum applications.
  • Controlling spectral properties is key for advanced optical phenomena.

Purpose of the Study:

  • To demonstrate photon echoes in Eu3+:Y2SiO5.
  • To utilize controlled inhomogeneous broadening for echo generation.
  • To explore the potential of this phenomenon for quantum memory.

Main Methods:

  • Controlled inhomogeneous broadening of the Eu3+ 7F0<-->5D0 transition using an electric field gradient.
  • Optical excitation and subsequent electric field polarity reversal to induce rephasing.
  • Observation and analysis of the resulting photon echo signal.

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Main Results:

  • Successful demonstration of photon echoes in Eu3+:Y2SiO5.
  • Established a method to induce and control inhomogeneous broadening via electric fields.
  • Observed echo generation through electric field polarity reversal.

Conclusions:

  • This work presents the first demonstration of electric field-induced photon echoes in Eu3+:Y2SiO5.
  • The technique offers a novel way to control optical transitions for coherent effects.
  • The demonstrated photon echo phenomenon shows potential for quantum memory applications.