We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


97% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Biphoton interference with a quantum dot entang...
View graph of relations

« Back

Biphoton interference with a quantum dot entangled light source

Research output: Contribution to journalJournal article


  • R. M. Stevenson
  • A. J. Hudson
  • R. J. Young
  • P. Atkinson
  • K. Cooper
  • D. A. Ritchie
  • A. J. Shields

Associated organisational unit

<mark>Journal publication date</mark>14/05/2007
<mark>Journal</mark>Optics Express
Number of pages6
<mark>Original language</mark>English


We demonstrate optical interferometry beyond the limits imposed by the photon wavelength using 'triggered' entangled photon pairs from a semiconductor quantum dot. Interference fringes of the entangled biphoton state reveals a periodicity half of that obtained with the single photon, and much less than that of the pump laser. High fringe visibility indicates that biphoton interference is less sensitive to decoherence than interference of two sequential single photons. The results suggest that quantum interferometry may be possible using a semiconductor LED-like device. (C) 2007 Optical Society of America