Andrei Sirenko, PhD

Primary research interest is in the fields of nanostructures, spin and lattice dynamics in multiferroic oxides, design of monolithically integrated optoelectronic devices, and development of advanced spectroscopic characterization techniques. Three main directions of the scientific activity are:

· Strain relaxation and surface migration at the sidewalls of optoelectronic nanostructures studied by the high-resolution x-ray diffraction (Device and Materials Physics)

· Far-IR spectroscopy of the soft-mode and magnons in multiferroic oxides (Materials Physics, Optics)

Experimental techniques utilized in these studies are synchrotron radiation-based nanoscale X-ray diffraction and Fourier transform infrared (FT-IR) spectroscopy, low-temperature micro-photoluminescence and Raman spectroscopy.

Sean O’Malley (graduate student, right) and Andrei Sirenko (left) are measuring far-infrared transmission spectra of the soft phonon modes and magnons in multiferroic single crystals at U12IR beamline of the National Synchrotron Light Source, Brookhaven National Lab.