Subwavelength Archimedean spirals have no inversion symmetry, and efficiently generate second-harmonic light when pumped by femtosecond laser pulses, especially in the circularly polarized mode that focuses the optical near field in the nanospiral center.
© 2015 Optical Society of America
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
Login to access OSA Member Subscription