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Title: Nonlinear optical properties of lanthanum titanate glasses prepared by levitation melting

Journal Article · · Applied Physics Letters
DOI: https://doi.org/10.1063/5.0196670 · OSTI ID:2323539
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4]; ORCiD logo [4]; ORCiD logo [4]
  1. Univ. of New Mexico, Albuquerque, NM (United States). Center for High Technology Materials (CHTM)
  2. Univ. of New Mexico, Albuquerque, NM (United States). Center for High Technology Materials (CHTM); Univ. of Kansas, Lawrence, KS (United States)
  3. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
  4. Materials Development, Inc., Evanston, IL (United States)
+ Show Author Affiliations

Lanthanum titanate glasses (17 La2O3-83 TiO2) are fabricated via aerodynamic levitation melting. Here, nonlinear refraction and absorption were measured with the Z scan technique using ps optical pulses at 532 nm wavelength with peak intensities in the range of 0.25–2.5 GW/cm2. The two-photon absorption coefficient (β) and the effective nonlinear refraction coefficient (⁠$$n^{eff}_{2}$$) are found to be, respectively, 2.19 cm/GW and 152 × 10-16 cm2/W (85 × 10-13 esu). The Raman gain is measured to be 106 × 10-11 cm/W. The nonlinearity strength is found to be nearly 60 times larger in lanthanum titanate glasses relative to silica.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); US Air Force Office of Scientific Research (AFOSR); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF)
Grant/Contract Number:
89233218CNA000001; SC0018601; NA-0003525; FA9451-22-2-0016; 80NSSC19K1288; 2217786
OSTI ID:
2323539
Report Number(s):
LA-UR-24-20124; TRN: US2409945
Journal Information:
Applied Physics Letters, Vol. 124, Issue 9; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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36 MATERIALS SCIENCE
glass
materials science
nonlinear optical materials
photon absorption
nonlinear optical properties
optical constants
optical properties
raman scattering
z-scan technique