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Title: Mid-Infrared Nonlinear Frequency Conversion Using Monolithic Barium Titanate on Silicon-on-Insulator

Journal Article · · IEEE Journal of Selected Topics in Quantum Electronics
 [1]; ORCiD logo [2];  [3];  [4];  [4];  [1]
  1. Texas A & M Univ., College Station, TX (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN) ; Stony Brook Univ., NY (United States)
  4. National Chung Hsing Univ., Taichung (Taiwan)

In this work, efficient nonlinear frequency conversion in the mid-infrared (mid-IR) region was demonstrated by a barium titanate (BTO) on a silicon-on-insulator (SOI) substrate. The BTO thin film was epitaxially grown by pulsed-laser deposition (PLD). The tensorial second order optical nonlinearity and the ferroelectric domain property of the BTO were characterized by the polarimetric mid-IR second harmonic generation (SHG) measurements. Azimuthal-dependent polarized SHG was modeled at different combinations of the nonlinear coefficient $$d_{ij}$$ and the domain fraction factor $ΔD^Y/ΔD^X$. Strong SHG intensity was experimentally observed over a broad spectrum at λ = 3.1 μm - 3.7 μm. A characteristic linear dependence between the SHG signal and the square of the pumping laser intensity was observed. The monolithic integration between the epitaxial BTO and the Si provides a compact platform for efficient on-chip light generation and quantum photonic technologies.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704
OSTI ID:
1969355
Report Number(s):
BNL-224201-2023-JAAM
Journal Information:
IEEE Journal of Selected Topics in Quantum Electronics, Journal Name: IEEE Journal of Selected Topics in Quantum Electronics Journal Issue: 1 Vol. 29; ISSN 1077-260X
Publisher:
IEEE Lasers and Electro-optics SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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