Search by tag «Advanced Optical Materials» 6 results
The staff of ITMO University’s Faculty of Physics have developed a dynamic nanostructure that changes its optical properties in response to external stimuli. At its core is a polymer that expands and contracts based on its temperature. The researchers have shown that nanostructures containing silicon nanoparticles can amplify light seven-fold – and the number blows up to 35 when the material is combined with gold. What’s more, the polymer can change its form an unlimited amount of times. Its potential uses include the development of automated heat sensors and various other smart devices.
In the future, the use of quasicrystals may open up new possibilities for laser and sensor design. This paper was published in the Advanced Optical Materials journal.
An international research group improved perovskite solar cells efficiency by using materials with better light absorption properties. For the first time, researchers used silicon nanoparticles. Such nanoparticles can trap light of a broad range of wavelengths near the cell active layer. The particles themselves don’t absorb light and don’t interact with other elements of the battery, thus maintaining its stability. The research was published in Advanced Optical Materials.
Halide perovskites are highly promising in regards to their application in the fields of photovoltaics and optoelectronics, including the development of new devices based on advanced nanophotonics concepts. In 2013, the journal Science included perovskites in its list of top-10 breakthrough technologies. This year, a team of ITMO scientists in collaboration with their colleagues from the University of Texas in Dallas and the Australian National University prepared a review where they studied the optical properties of nanostructured perovskites, answered the question of why fundamental studies of these structures are most important for the development of new optical devices, as well as made predictions about future research in this field. The material was published in a special Hall of Fame issue of Advanced Optical Materials.
Physicists have managed to create an experimental structure with a strong toroidal dipole response of the electromagnetic field over a wide frequency range. This response is associated with a special configuration of electromagnetic currents causing high concentration of the field. A special dielectric metalattice was created to produce and measure the response. The results can be used to create non-scattering materials, as well as to effectively control electromagnetic fields. The research was published in Advanced Optical Materials.
Researchers from ITMO University and their international colleagues have developed the first three-dimensional dynamic model of an interaction between light and silicon nanoparticles. They used a supercomputer with graphic accelerators for the calculations. Results showed that when exposed to short, intense laser pulses, silicon particles temporarily lose their symmetry and their optical properties become strongly heterogeneous. Such a change in properties depends on particle size; therefore it can be used to control light at nanoscale and in ultrafast information processing devices. The study was published in Advanced Optical Materials.