Optimizing the spectro-temporal properties of photon pairs from Bragg-reflection waveguides

H. Chen, K. Laiho, B. Pressl, A. Schlager, H. Suchomel, M. Kamp, S. Höfling, C. Schneider, G. Weihs

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Bragg-reflection waveguides (BRWs) fabricated from AlGaAs provide an interesting non-linear optical platform for photon-pair generation via parametric down-conversion (PDC). In contrast to many conventional PDC sources, BRWs are made of high refractive index materials and their characteristics are very sensitive to the underlying layer structure. First, we show
that the design parameters like the phasematching wavelength and the group
refractive indices of the interacting modes can be reliably controlled even in the presence of fabrication tolerances. We then investigate, how these characteristics can be taken advantage of when designing quantum photonic applications with BRWs. We especially concentrate on achieving a small differential group delay between the generated photons of a pair and then explore the performance of our design when realizing a Hong-Ou-Mandel interference experiment or generating spectrally multi-band polarization entangled states. Our results show that the versatility provided by engineering the dispersion in BRWs is important for employing them in different quantum optics tasks.
Original languageEnglish
Article number054001
Number of pages10
JournalJournal of Optics
Volume21
Issue number5
DOIs
Publication statusPublished - 2 Apr 2019

Keywords

  • Bragg-reflection waveguide
  • Parametric down-conversion
  • Phase matching
  • Quantum state engineering and measurements

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