Abstract
The general conclusions of the recent article by Andrews and Blake [Phys. Rev. A 38, 3113 (1988)] on the forbidden nature of higher-order multipolar contributions to optical second-harmonic generation are misleading and not generally valid.
- Received 8 March 1989
DOI:https://doi.org/10.1103/PhysRevA.41.4549
©1990 American Physical Society
