A series of new multifunctional nanomesoporous materials based on upconversion nanophosphors NaYF4:Yb,Tm@NaGdF4 (UCNPs) and lanthanide complexes were designed and synthesized through mesoporous capping UCNPs nanophosphors and linking lanthanide (Ln) complexes. The obtained UCNPs@mSiO2-Ln(dbm)4 (Ln = Eu, Sm, Er, Nd, Yb) materials can achieve downconversion and upconversion luminescence to show m...

Plasmon-mediated coalescence of two nearby gold nanorods (NRs) suspended in water induced by the illumination of a linearly polarized (LP) light was studied theoretically. We analyzed the coupled optical forces and torques in terms of Maxwell's stress tensor upon two identical NRs irradiated by a LP plane wave using the multiple multipole method to estimate the optomechanical outcome. Numerical...

We present a review of short-wave infrared (SWIR, defined here as ∼1000 to 2000 nm) spectroscopy and imaging techniques for biological tissue optical property characterization. Studies indicate notable SWIR absorption features of tissue constituents including water (near 1150, 1450, and 1900 nm), lipids (near 1040, 1200, 1400, and 1700 nm), and collagen (near 1200 and 1500 nm) that are much mor...

Abstract Present article describes a 3D gonioreflectometer developed at Aalto University for the measurement of spectral bidirectional reflectance distribution function (sBRDF) horizontally aligned samples, needed to study sBRDF sand from satellite calibration test sites. The new set-up incorporates three motorized arms that allow measure in- and out-of-plane sBRDF. Illumination sample is provi...

Macro vivo fluorescence imaging is becoming more and important in the medical field. It also necessary to design optical system for visible light of NIR-II detector. This paper discusses method wide spectrum achromatic from NIR-II. Based on ZEMAX, a zoom designed freely observe experimental targets fields view 3.1–18.6°. The four components layout was adopted by system, which suitable 8.2 mm (1...

This paper reports on the light amplification of NaGdF4:Yb,Er,[email protected]4:Yb,[email protected]4 core–shell–shell downconversion nanoparticles (CSS-DCNPs) in near-infrared second biological window (NIR-II: 1000–1700 nm) by plasmonic nanostructures. Through a precisely controlled metallic nanostructure, fluorescence from Yb3+ induced 1000 nm emission, Nd3+ 1060 and Er3+ 1527 emission are e...

We propose simple rectangular cross-section, few-cm long SiN waveguide designs capable of generating ultra-broadband frequency-correlated photon pairs via SFWM, exceeding an octave in bandwidth spanning the visible-to-telecom wavelengths ( $$\sim$$ 700–1700 nm for 1- $$\upmu$$ m pump) with a spectral brightness $$>2.5\times 10^4$$ pairs/s/nm/mW $$^2$$ . Such compact sources, entire telecom spec...