Amplification by optical composites

Abstract

Optical amplification is demonstrated in waveguides of composite materials consisting of nanocrystals of Cr:forsterite or Cr:diopside embedded in a host polymer with a matching refractive index. Small-signal gains of 1dB / cm at lambda=1.23microm are reported.

Monazite and Zircon Type LaVO4:Eu Nanocrystals – Synthesis, Luminescent Properties, and Spectroscopic Identification of the Eu3+ Sites

“…[4] Recently, studies also disclose their potential application in biological detection and biotechnology. [5] This inspires research on rareearth-doped luminescence nanocrystals, both in terms of synthesis and size and structure-dependent luminescence behavior.…”

“…Therefore, LaVO 4 crystallizes solely as the monazite type in an equilibrium state and other orthovanadates including those of Sc and Y crystallize as the zircon type. [14] In addition to the thermodynamically stable monazite structure, LaVO 4 can also crystallize as the zircon structure, [15][16][17] a metastable polymorph, under some mild conditions. Therefore, Eu 3+ -doped LaVO 4 can be formed as either the monazite-or zircon type of structure.…”

“…[14] In addition to the thermodynamically stable monazite structure, LaVO 4 can also crystallize as the zircon structure, [15][16][17] a metastable polymorph, under some mild conditions. Therefore, Eu 3+ -doped LaVO 4 can be formed as either the monazite-or zircon type of structure. Although m-LaVO 4 was not regarded as a good host for Eu 3+ ions, t-LaVO 4 :Eu may be a promising luminescence material because of its zircon structure, similar to that of YVO 4 :Eu.…”

“…Therefore, Eu 3+ -doped LaVO 4 can be formed as either the monazite-or zircon type of structure. Although m-LaVO 4 was not regarded as a good host for Eu 3+ ions, t-LaVO 4 :Eu may be a promising luminescence material because of its zircon structure, similar to that of YVO 4 :Eu. Therefore, among the rare-earth-ion-activated Ln-based luminescence materials, LaVO 4 :Eu was chosen as it has two crystal phases (monazite and zircon) and it can be selectively investigated for its structure-related properties on the nanometer scale.…”

Silica‐Coated CaF2:Eu3+ Nanoparticles Functionalized with Oxalic Acid for Bio‐conjugation to BSA Proteins

“…1,2 These luminescent nanoscale materials are considered as the potentially useful active components in lamps and display, 3 optical amplifiers 4 and solar-energy converters. 5 Generally these devices exploit the improved optoelectronic properties of nanoparticles.…”