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Title: Lightwave Circuits in Lithium Niobate through Hybrid Waveguides with Silicon Photonics

Here, we demonstrate a photonic waveguide technology based on a two-material core, in which light is controllably and repeatedly transferred back and forth between sub-micron thickness crystalline layers of Si and LN bonded to one another, where the former is patterned and the latter is not. In this way, the foundry-based wafer-scale fabrication technology for silicon photonics can be leveraged to form lithium-niobate based integrated optical devices. Using two different guided modes and an adiabatic mode transition between them, we demonstrate a set of building blocks such as waveguides, bends, and couplers which can be used to route light underneath an unpatterned slab of LN, as well as outside the LN-bonded region, thus enabling complex and compact lightwave circuits in LN alongside Si photonics with fabrication ease and low cost.
 [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [1]
  1. Univ. of California, San Diego, CA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. SRICO Inc., Columbus, OH (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 2045-2322; srep22301
Grant/Contract Number:
AC04-94AL85000; ECCS 1307514
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
42 ENGINEERING; Integrated optics; Silicon photonics; 36 MATERIALS SCIENCE; integrated optics; silicon photonics
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1262310