The research line on Photonics at CFM deals with the study of the interaction of radiation and matter from different and complementary approaches: (i) the interaction of light with metallic and semiconductor nanostructures to confine and engineer electromagnetic fields in the nanoscale, (ii) the research on the optical properties of new materials and elements that provide improved properties in a variety of lasing effects, as well as the design of novel photonic structures that provide laser confinement for bioimaging, and (iii) the spectroscopy and photonic applications of nano-scale functional units, including different types of low-dimensional systems.
Several groups, listed below, develop research along these lines, including theoretical and experimental activity:
THE RESEARCH GROUPS
LASER PHYSICS AND PHOTONIC MATERIALS
The “Laser Physics and Photonic Materials” group is located in the Department of Applied Physics of the School of Engineering of the University of the Basque Country (UPV/EHU) in Bilbao, and devotes most of its research efforts to the optoelectronic properties of new materials and structures for solid state lasing and photonic crystal properties. Its activity also covers the development of a complete set of high resolution techniques, the development of new low-energy phonons rare earth-doped dielectric materials for energy converters and/or solid state laser cooling applications, and the probing, characterizing, and modeling transport and/or confinement of ultrafast ultra-intense laser light in inhomogeneous (nano- micro) dielectric materials doped with optically active centers for nanosensors, displays, and bioimaging applications.
NANOMATERIALS AND SPECTROSCOPY
“Nanomaterials and Spectroscopy” group is focused on spectroscopy and photonic applications of nano-scale functional units, including semiconductor quantum dots and quantum wires, metal nanoparticles and nanoantennas and organic/inorganic nano-hybrid systems. Further research activity in the group includes the study of optical properties in semiconductor nanocrystals (quantum dots), nano-hybrid materials, heterostuctures (quantum wires), metal nanoparticles, nanoantenas and organic functional materials (J-aggregates), as well as novel experimental approaches to control, manipulate and probe with light on nanoscale.
THEORY OF NANOPHOTONICS
“Theory of Nanophotonics” group is devoted to the theoretical description of the optical properties of nanoscale structures. The understanding of these properties requires the analysis of the different time and space scales that come into play. An optimal control of the optical signal in the nanoscale is also addressed. Other phenomena that are currently under analysis include quantum plasmonics, acousto-plasmonics, metallic nanoantennas, field-enhanced spectroscopy and microscopy, as well as the theory of near-field microscopy.
Optical response of metallic nanoantennas in a variety of spectroscopy and microscopy configurations.
Scanning confocal time-resolved photoluminescence setup (MicroTime200, PicoQuant) providing single molecule sensitivity and high temporal resolution. Range of application includes Fluorescence Lifetime Imaging (FLIM), Fluorescence Correlation Spectroscopy (FCS), Forster Resonance Energy Transfer (FRET), Fluorescence Lifetime Measurements, Fluorescence Anisotropy and Intensity Time Traces.
Spectroscopic equipment (Cary50, Varian) for measurement of energy transfer and conversion.
Continuous and time-resolved (with nano-pico excitation laser sources) spectroscopies with high spectral resolution in the UV-VIS-IR domains together with low temperature facilities (2K). Home made photoacoustic spectrometer.
Tunable femtosecond sources (with regenerative amplification) in the IR domain with shigh speed detectors in the picosecond domain (Streak camera). Multiphoton microscope with time-resolved spectroscopic facilities.
Crystal growth facilities by using home made Bridgman and Czochralski fournaces. Computing Facilities for Calculation of Electromagnetic Response Several computing clusters at CFM and other institutions (such as DIPC) under collaborative research. Several scientific codes for solving Maxwell equations, based on finite differences in time domain (e.g., Lumerical solutions), discrete dipole approximation (DDA), etc.
Development of own scientific software for calculation of electromagnetic response.