Efficient frequency conversion of low-intensity light in AlGaAs-on-insulator waveguides

Emil Zanchetta Ulsig, Iterio Degli Eredi, Nicolas Volet

Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearchpeer-review


A design study is presented for difference-frequency generation (DFG) in aluminum gallium arsenide (AlGaAs)- on-insulator waveguides. AlGaAs is a mature technology platform with large optical nonlinearities, a high refractive index contrast, and the presence of second-order susceptibility, making it interesting for chip-based frequency conversion. This work targets to efficiently down-convert single-photons to the telecom C-band by DFG. Modal phase-matching (PhM) is used, where the waveguide dimensions are optimized for an efficient and robust conversion of single-photons at 930 nm to around 1550 nm. This paves the way for a single-photon converter that can be integrated on a chip-platform with a single-photon emitters, along other photonic components with standard fabrication techniques. Furthermore, a thorough revision of the DFG theory provides insight into the particular case of a low-powered pump, which is relevant for quantum applications. Finally, a comparison is made with state of the art devices in periodically poled thin film lithium niobate (PPLN). This is, to the best of our knowledge, the first design of a single-photon converter operating in the telecom band that is realized with a III-V material.

Original languageEnglish
Title of host publicationNonlinear Frequency Generation and Conversion : Materials and Devices XXI
EditorsPeter G. Schunemann, Valentin Petrov
Place of publicationWashington
PublisherSPIE - International Society for Optical Engineering
Publication dateMar 2022
Article number119850D
ISBN (Electronic)9781510648418
Publication statusPublished - Mar 2022
EventSPIE LASE - The Moscone Center, San Francisco, United States
Duration: 22 Jan 202227 Jan 2022


ConferenceSPIE LASE
LocationThe Moscone Center
Country/TerritoryUnited States
CitySan Francisco
Internet address
SeriesProceedings of SPIE - The International Society for Optical Engineering


  • AlGaAs
  • difference-frequency generation
  • nonlinear waveguide
  • single-photon down-conversion


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