Upconversion (UC) refers to nonlinear optical processes in which the sequential absorption
of two or more photons leads to the emission of light at shorter wavelength than the …

The term nonlinear optics (NLO) was coined to describe the nonlinear relationship between
dielectric polarization P and electric field E in optical media. NLO is a cornerstone of the …

Controlling mechanical properties of ordered organic materials remains a formidable
challenge, despite their great potential for high performance mechanical actuators …

Discussing theory and transport, synthesis, processing, properties, and applications, this
second edition of a standard resource covers advances in the field of electrically conducting …

Information is created, processed, transported, and detected using electrons, photons,
phonons, or plasmons. Of these basic components of information technology, utilization of …

The electronic properties of linear π-conjugated systems (LCSs) have acquired a growing
importance in many areas of modern chemistry and physics of condensed matter. At the …

Ferroelectrics are electro-active materials that can store and switch their polarity
(ferroelectricity), sense temperature changes (pyroelectricity), interchange electric and …

Polymer composites are one of the most attractive near‐term means to exploit the unique
properties of carbon nanotubes and graphene. This is particularly true for composites aimed …

The field of nonlinear optics emerged three decades ago with the development of the first
operating laser and the demonstration of frequency doubling phenomena. These milestone …

A spectroscopic investigation of NaYF4 powders doped with several different concentrations
of Er3+, Tm3+ and/or Yb3+ is described. Rare earth-doped NaYF4 is known to be a very …