title: Bifractal focusing and imaging properties of Thue-Morse Zone Plates.
abstract: We present a new family of Zone Plates (ZPs) designed using the Thue-Morse sequence. The focusing and imaging properties of these aperiodic diffractive lenses coined Thue-Morse Zone Plates (TMZPs) are examined. It is demonstrated that TMZPs produce a pair of self-similar and equally intense foci along the optical axis. As a consequence of this property, under broadband illumination, a TMZP produces two foci with an extended depth of focus and a strong reduction of the chromatic aberration compared with conventional periodic ZPs. This distinctive optical characteristic is experimentally confirmed.
authors.forename: Vicente
authors.initials: V
authors.lastname: Ferrando
authors.forename: Fernando
authors.initials: F
authors.lastname: Giménez
authors.forename: Walter D
authors.initials: WD
authors.lastname: Furlan
authors.forename: Juan A
authors.initials: JA
authors.lastname: Monsoriu