Open AccessDesign of broadband reflective circular polarizer for attosecond pulse in the extreme ultraviolet region
Author(s) -
Xin Tang,
Shujing Chen,
Chengyou Lin,
Yingchun Ding
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.022537
Subject(s) - extreme ultraviolet lithography , optics , extreme ultraviolet , polarizer , circular polarization , attosecond , broadband , polarization (electrochemistry) , physics , linear polarization , laser , ultrashort pulse , birefringence , chemistry , microstrip
In this paper, we present a design method of broadband reflective circular polarizer (BRCP) in the extreme ultraviolet (EUV) region. By using this method, we designed three BRCPs with a 6, 12 and 18 eV bandwidth, respectively. Then, we investigated the performances of designed BRCPs in theory. The results indicated that the reflected lights of these BRCPs all showed a nearly 100% circular polarization degree and considerable circular reflection in their design band. In addition, we also studied the origin of high circular polarization degree by analyzing the phase shift and the reflectivity ratio between s- and p-polarized lights induced by the reflection of BRCPs. Furthermore, the pulse responses of BRCPs for attosecond pulses were also investigated. The proposed EUV BRCPs can be used for controlling the polarization state of broadband EUV sources, e.g., generating the circularly polarized attosecond pulse by a linearly polarized one.