title: Resonantly enhanced real hyperpolarizability.
abstract: We show theoretically and experimentally how the first hyperpolarizability of a three-level molecule at a two-photon resonance can obtain a real value with strong resonant enhancement. This phenomenon arises from destructive interference of the usually dominant imaginary parts of the resonant hyperpolarizability.
authors.forename: G
authors.initials: G
authors.lastname: Meshulam
authors.forename: G
authors.initials: G
authors.lastname: Berkovic
authors.forename: Z
authors.initials: Z
authors.lastname: Kotler