Resonant Quadrupole-Dipole Raman Scattering at the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>1</mn><mi>S</mi></math></span> Yellow Exciton in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Cu</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>O

A. Compaan; H. Z. Cummins

doi:10.1103/PhysRevLett.31.41

Resonant Quadrupole-Dipole Raman Scattering at the $1 S$ Yellow Exciton in ${Cu}_{2}$ O

A. Compaan and H. Z. Cummins

Phys. Rev. Lett. 31, 41 – Published 2 July 1973

Abstract

Strong first-order Raman scattering of the normally forbidden odd-parity phonons is observed in ${Cu}_{2}$ O excited by a tunable dye laser in resonance with the intrinsic dipoleforbidden $1 S$ yellow exciton. The resonance enhancement and the polarization behavior of these Raman lines are explained by including the electric quadrupole term of the exciton-photon interaction in the calculation of the Raman cross section.