Barium titanate nanostructures and thin films for photonics

A Karvounis, F Timpu… - Advanced Optical …, 2020 - Wiley Online Library
Barium titanate (BaTiO3) is a synthetic crystal used in electromechanical transducers and
multilayer ceramic capacitors. Since it is not available in nature, a variety of growth methods …

Chiral imaging of collagen by second-harmonic generation circular dichroism

H Lee, MJ Huttunen, KJ Hsu, M Partanen… - Biomedical optics …, 2013 - opg.optica.org
We provide evidence that the chirality of collagen can give rise to strong second-harmonic
generation circular dichroism (SHG-CD) responses in nonlinear microscopy. Although …

Quantifying collagen fiber orientation in breast cancer using quantitative phase imaging

H Majeed, C Okoro, A Kajdacsy-Balla… - … of biomedical optics, 2017 - spiedigitallibrary.org
Tumor progression in breast cancer is significantly influenced by its interaction with the
surrounding stromal tissue. Specifically, the composition, orientation, and alignment of …

Versatile generation of optical vector fields and vector beams using a non-interferometric approach

S Tripathi, KC Toussaint Jr - Optics express, 2012 - opg.optica.org
We present a versatile, non-interferometric method for generating vector fields and vector
beams which can produce all the states of polarization represented on a higher-order …

Point group symmetry determination via observables revealed by polarized second-harmonic generation microscopy:(1) theory

MA van der Veen, F Vermoortele, DE De Vos… - Analytical …, 2012 - ACS Publications
We present a methodology based on polarization-controlled second-harmonic generation
microscopy that allows one to determine the point group symmetry of noncentrosymmetric …

Mechanochemical reactions of lithium niobate induced by high-energy ball-milling

L Kocsor, L Péter, G Corradi, Z Kis, J Gubicza… - Crystals, 2019 - mdpi.com
Lithium niobate (LiNbO3, LN) nanocrystals were prepared by ball-milling of the crucible
residue of a Czochralski grown congruent single crystal, using a Spex 8000 Mixer Mill with …

Spontaneous polarization in ultrasmall lithium niobate nanocrystals revealed by second harmonic generation

B Knabe, K Buse, W Assenmacher, W Mader - Physical Review B …, 2012 - APS
Nanocrystals of lithium niobate (LiNbO 3) with diameters of between 5 and 50 nm were
produced by a combination of sol-gel synthesis and wet-chemical etching. The phase purity …

Harnessing randomness to control the polarization of light transmitted through highly scattering media

S Tripathi, KC Toussaint Jr - Optics Express, 2014 - opg.optica.org
We show that the multiple scattering events taking place inside a highly scattering medium,
in conjunction with wavefront shaping, can be used to control the state of polarization of the …

Microscopic determination of second-order nonlinear optical susceptibility tensors

L Naskali, MJ Huttunen, M Virkki… - The Journal of …, 2014 - ACS Publications
We demonstrate a microscopy technique that extracts tensorial information about the second-
order nonlinear optical susceptibility and hyperpolarizability of molecular materials. Our …

Quantitative control over the intensity and phase of light transmitted through highly scattering media

S Tripathi, KC Toussaint Jr - Optics Express, 2013 - opg.optica.org
We experimentally demonstrate the use of the transmission matrix (TM) to quantitatively
control the amplitude and phase of the light transmitted through highly scattering media. This …