Phononic engineered materials and devices

Crystal particle Raman-scattering and applications for improved solar cell performance

“…The results are consistent with a phonon transfer mechanism in which phonons generated by Stokes shift events contribute to the phonon density in the exact wavelength ranges needed for subsequent anti-Stokes events. Long phonon lifetime is expected in small particles since phonon decay in part relies upon longer wavelength phonon decay products (Umklapp processes 16 ) that cannot exist in smallsized particles.…”