Design of reflective quarter-wave plates in extreme ultraviolet

Lin, Chengyou; Chen, Shujing; Chen, Zhaoyang; Ding, Yingchun

doi:10.1016/j.optcom.2015.03.010

Cited by 6 publications

(1 citation statement)

References 29 publications

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“…Compared with the existing approaches for generating circularly polarized attosecond sources, this externally modulated method can be realized by simply inserting a broadband QWP into the traditional HHG system, and will achieve a higher degree of circular polarization and total throughput providing the broadband QWPs are designed properly. Although EUV QWPs [21][22][23][24] have been studied for nearly 25 years since Kortright and Underwood [21] first investigated the possibility of a EUV QWP using a transmission multilayer structure, broadband QWPs for polarization control of isolated attosecond pulses are still not available.…”

Section: Introductionmentioning

confidence: 99%

Design of broadband transmission quarter-wave plates for polarization control of isolated attosecond pulses

Chen

Lin

Gao

2015

J. Opt.

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Using a standard Levenberg-Marquardt algorithm, broadband quarter-wave plates (QWPs) with bandwidth from 3 to 18 eV in the extreme ultraviolet (EUV) region were designed using aperiodic Mo/Si multilayers. By analyzing the design results of the Mo/Si multiayers with different bilayer numbers, we found that a Mo/Si multilayer with more bilayers can achieve broader phase control, but suffers from lower total throughput and a degree of circular polarization. In addition, the pulse broadenings caused by the group delay dispersions of the designed broadband QWPs were studied, and their layer distributions were investigated. The oscillating distribution of bilayer thickness in optimized multilayers was observed, which is considered to be the reason for forming the broadband phase control. Such broadband QWPs can be applied to generate a circularly polarized broadband EUV source, such as isolated attosecond pulse, directly from a linearly polarized source.

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Section: Introductionmentioning

confidence: 99%

Design of broadband transmission quarter-wave plates for polarization control of isolated attosecond pulses

Chen

Lin

Gao

2015

J. Opt.

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EUV polarimetry for thin film and surface characterization and EUV phase retarder reflector development

Gaballah

Nicolosi

Ahmed

et al. 2018

Review of Scientific Instruments

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The knowledge and the manipulation of light polarization state in the vacuum ultraviolet and extreme ultraviolet (EUV) spectral regions play a crucial role from materials science analysis to optical component improvements. In this paper, we present an EUV spectroscopic ellipsometer facility for polarimetry in the 90-160 nm spectral range. A single layer aluminum mirror to be used as a quarter wave retarder has been fully characterized by deriving the optical and structural properties from the amplitude component and phase difference δ measurements. The system can be suitable to investigate the properties of thin films and optical coatings and optics in the EUV region.

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Design of reflective phase retarders in the extreme ultraviolet based on chirped Mo/Si multilayer mirrors

Yang¹,

Chen²,

Lin³

2021

J Synchrotron Radiat

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The extreme ultraviolet (EUV) phase retarder is an important optical element for polarization analysis and conversion of EUV synchrotron radiation. In this paper, a linearly chirped Mo/Si multilayer mirror is used to design an EUV phase retarder. With increasing thickness variation of the chirped multilayer, the reflective phase retardation between s- and p-polarized light increases at first and then reaches its maximum value. When the bilayer number increases from 2 to 20, the maximum phase retardation for an EUV source with a photon energy of 90 eV increases from 5.97° to 245.10° for a linearly chirped Mo/Si multilayer with 14.7 nm central thickness. In addition, the phase retardations of chirped mirrors at different photon energies (80 eV, 85 eV and 90 eV) are also investigated and compared. Furthermore, the physical mechanism of reflective phase retardation improvement is also studied by investigating the field intensity distributions inside chirped mirrors.

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Design of reflective quarter-wave plates in extreme ultraviolet

Cited by 6 publications

References 29 publications

Design of broadband transmission quarter-wave plates for polarization control of isolated attosecond pulses

Design of broadband transmission quarter-wave plates for polarization control of isolated attosecond pulses

EUV polarimetry for thin film and surface characterization and EUV phase retarder reflector development

Design of reflective phase retarders in the extreme ultraviolet based on chirped Mo/Si multilayer mirrors

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