Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Interference experiment using entangled photons with wavelengths of 640 nm and 660 nm

파장 640 nm와 660 nm 광자쌍의 간섭

  • Kim Heonoh (Deparment of Physics, University of Ulsan) ;
  • Shin Harim (Deparment of Physics, University of Ulsan) ;
  • Kim Wonsik (Deparment of Physics, University of Ulsan) ;
  • Kwon Osung (Deparment of Physics, University of Ulsan) ;
  • Kim Taesoo (Deparment of Physics, University of Ulsan)
  • Published : 2004.10.01
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Abstract

We present a quantum interference experiment with frequency-entangled pairs of photons with wavelength of 640 nm and 660 nm produced in the process of parametric down-conversion. When photon pairs in different angular frequencies $\omega$$_1$and $\omega$$_2$are registered by two detectors the coincidence counts exhibits a two-photon fringe as a function of relative time delay $\delta$$\tau$ of two photons within the coherence time depending on the arrangement of the detector pairs.

매개하향변환과정에서 발생한 640 nm와 660 nm 파장을 갖는 광자쌍의 진동수 얽힘상태를 이용하여 양자간섭실험을 수행하였다. 두 광자의 파장에 대응하는 각진동수가 각각 $\omega$$_1$과 $\omega$$_2$인 광자쌍을 간섭계의 출구에 놓인 두 검출기로 서로 다른 진동수의 광자들을 동시계수할 때, 광의 결맞음 시간이내에서 두 광자가 빔분할기에 도달하는 시간 간격의 변화 $\delta$$\tau$에 따라 동시계수가 변하는 간섭무늬를 관측하였다.

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References

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