Dr. Youwei Yao Profile

Dr. Youwei Yao

at NASA Goddard Space Flight Center

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 31 August 2022 Poster + Paper

Coating of thin, lightweight x-ray mirrors without distortion

Peter Solly, William Zhang, David Windt, Youwei Yao

Proceedings Volume 12181, 121814P (2022) https://doi.org/10.1117/12.2629540

KEYWORDS: Mirrors, Coating, Atomic layer deposition, Silicon, Iridium, Platinum, Ion beam finishing, X-ray optics, Distortion

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Proceedings Article | 26 August 2022 Presentation

Progress in nanosilicate bonding of x-ray mirrors

Mark Schattenburg, Youwei Yao, Anjelica Molnar-Fenton, Ralf Heilmann, Alexander Bruccoleri

Proceedings Volume 12181, 1218115 (2022) https://doi.org/10.1117/12.2630349

KEYWORDS: Mirrors, X-rays, Epoxies, Silicates, X-ray telescopes, Silica, Photovoltaics, Optical fabrication

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Proceedings Article | 16 August 2021 Open Access

A general stress patterning method for manufacturing ultra-precise free-form deformation in thin-substrates (Conference Presentation) (Withdrawal Notice)

Youwei Yao, Brandon Chalifoux, Ralf Heilmann, Mark Schattenburg

Proceedings Volume 11822, 118220W (2021) https://doi.org/10.1117/12.2595537

KEYWORDS: X-ray optics, Optical lithography, Optics manufacturing, Manufacturing, X-rays, X-ray astronomy, Gamma-ray astronomy, Extreme ultraviolet, EUV optics, Astronomical imaging

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Proceedings Article | 3 August 2021 Poster

Sol-gel nanoparticle bonding of X ray telescope optics for assembly

Anjelica Molnar-Fenton, Alexander Bruccoleri, Youwei Yao, Ralf Heilmann, Mark Schattenburg

Proceedings Volume 11822, 118221B (2021) https://doi.org/10.1117/12.2594864

KEYWORDS: Silicates, X-ray telescopes, X-ray optics, Sodium, Mirrors, X-rays, Wavefront sensors, Spatial resolution, Silica, Nanoimprint lithography

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Proceedings Article | 9 September 2019 Paper

X-ray telescope deformation reduction using stress relief features

Anjelica Molnar-Fenton, Alexander Bruccoleri, Youwei Yao, Ralf Heilmann, Mark Schattenburg

Proceedings Volume 11119, 111191T (2019) https://doi.org/10.1117/12.2530572

KEYWORDS: Adhesives, X-ray optics, X-ray telescopes, Distortion, Silicon, Mirrors, Finite element methods, Oxides, Spatial resolution, Semiconducting wafers

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Proceedings Article | 9 September 2019 Presentation

Development of a thermal-oxide patterning method for mitigating coating stress-induced distortion in silicon mirrors for the Lynx X-Ray Telescope mission concept (Conference Presentation)

Youwei Yao, Brandon Chalifoux, Ralf Heilmann, Kai-Wing Chan, Hideyuki Mori, Takashi Okajima, William Zhang, Mark Schattenburg

Proceedings Volume 11119, 1111909 (2019) https://doi.org/10.1117/12.2531153

KEYWORDS: Oxides, Coating, Optical lithography, Silicon, Mirrors, Distortion, X-ray telescopes, Semiconducting wafers, Iridium, Finite element methods

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SPIE Journal Paper | 29 April 2019 Open Access

Progress of coating stress compensation of silicon mirrors for Lynx x-ray telescope mission concept using thermal oxide patterning method

Youwei Yao, Brandon Chalifoux, Ralf Heilmann, Kai-Wing Chan, Hideyuki Mori, Takashi Okajima, William Zhang, Mark Schattenburg

JATIS, Vol. 5, Issue 02, 021011, (April 2019) https://doi.org/10.1117/12.10.1117/1.JATIS.5.2.021011

KEYWORDS: Mirrors, Coating, Oxides, Silicon, Iridium, Annealing, Distortion, Optical lithography, X-rays, Semiconducting wafers

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SPIE Journal Paper | 9 March 2019 Open Access

Simulations of film stress effects on mirror segments for the Lynx X-ray Observatory concept

Brandon D. Chalifoux, Youwei Yao, Ralf K. Heilmann, Mark L. Schattenburg

JATIS, Vol. 5, Issue 02, 021004, (March 2019) https://doi.org/10.1117/12.10.1117/1.JATIS.5.2.021004

KEYWORDS: Mirrors, Ray tracing, X-rays, Point spread functions, Silicon films, Coating, Silicon, Observatories, Diffraction, Iridium

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Proceedings Article | 6 July 2018 Paper

Thermal oxide patterning method for compensating coating stress in silicon x-ray telescope mirrors

Youwei Yao, Brandon Chalifoux, Ralf Heilmann, Kai-Wing Chan, Hideyuki Mori, William Zhang, Mark Schattenburg

Proceedings Volume 10699, 1069942 (2018) https://doi.org/10.1117/12.2314748

KEYWORDS: Mirrors, Oxides, Coating, Silicon, Semiconducting wafers, Distortion, Optical lithography, Photomasks, Iridium, X-ray telescopes

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Proceedings Article | 6 July 2018 Paper

Compensating film stress in silicon substrates for the Lynx X-ray telescope mission concept using ion implantation

Brandon Chalifoux, Youwei Yao, Heng Zuo, Ralf Heilmann, Mark Schattenburg

Proceedings Volume 10699, 1069959 (2018) https://doi.org/10.1117/12.2314895

KEYWORDS: Semiconducting wafers, Mirrors, Silicon, Ion implantation, Ions, Annealing, Metrology, Silicon films, Chromium, Wavefront sensors

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Proceedings Article | 6 July 2018 Paper

X-ray telescope mirror mounting and deformation reduction using ThermoYield actuators and mirror geometry changes

Michael DeTienne, Alexander Bruccoleri, Anjelica Molnar-Fenton, Brandon Chalifoux, Ralf Heilmann, Youwei Yao, Mark Schattenburg

Proceedings Volume 10699, 1069943 (2018) https://doi.org/10.1117/12.2314896

KEYWORDS: Mirrors, Actuators, X-ray telescopes, Capacitors, X-ray optics, Metals, Neck, Tungsten, Distortion, Epoxies

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Proceedings Article | 29 August 2017 Presentation + Paper

Lamination of ultra-thin silicon wafers for producing high-quality and low-cost x-ray telescope mirrors

Youwei Yao, Mark Schattenburg

Proceedings Volume 10399, 1039912 (2017) https://doi.org/10.1117/12.2275330

KEYWORDS: Semiconducting wafers, Mirrors, X-ray telescopes, Silicon, Glasses, Wafer bonding, X-rays, Wafer-level optics, X-ray optics, Polishing

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Proceedings Article | 29 August 2017 Presentation + Paper

Using ion implantation for figure correction in glass and silicon mirror substrates for x-ray telescopes

Brandon Chalifoux, Claire Burch, Ralf Heilmann, Youwei Yao, Heng Zuo, Mark Schattenburg

Proceedings Volume 10399, 103991D (2017) https://doi.org/10.1117/12.2275324

KEYWORDS: Ion implantation, X-rays, Mirrors, Glasses, Silicon, Telescopes, Optical calibration, Observatories, Crystals, Ions

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Proceedings Article | 29 August 2017 Presentation + Paper

Recent progress on air-bearing slumping of segmented thin-shell mirrors for x-ray telescopes: experiments and numerical analysis

Heng Zuo, Youwei Yao, Brandon Chalifoux, Michael DeTienne, Ralf Heilmann, Mark Schattenburg

Proceedings Volume 10399, 1039910 (2017) https://doi.org/10.1117/12.2274273

KEYWORDS: Mirrors, Glasses, Space telescopes, Nitrogen, Semiconducting wafers, Spatial frequencies, Numerical analysis, X-ray telescopes, Nanolithography, Telescopes

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Proceedings Article | 27 October 2016 Paper

Toward large-area sub-arcsecond x-ray telescopes II

Stephen O'Dell, Ryan Allured, Andrew Ames, Michael Biskach, David Broadway, Ricardo Bruni, David Burrows, Jian Cao, Brandon Chalifoux, Kai-Wing Chan, Yip-Wah Chung, Vincenzo Cotroneo, Ronald Elsner, Jessica Gaskin, Mikhail Gubarev, Ralf Heilmann, Edward Hertz, Thomas Jackson, Kiranmayee Kilaru, Jeffrey Kolodziejczak, Ryan McClelland, Brian Ramsey, Paul Reid, Raul Riveros, Jacqueline Roche, Suzanne Romaine, Timo Saha, Mark Schattenburg, Daniel Schwartz, Eric Schwartz, Peter Solly, Susan Trolier-McKinstry, Melville Ulmer, Alexey Vikhlinin, Margeaux Wallace, Xiaoli Wang, David Windt, Youwei Yao, Shi Ye, William Zhang, Heng Zuo

Proceedings Volume 9965, 996507 (2016) https://doi.org/10.1117/12.2238247

KEYWORDS: X-ray telescopes, Mirrors, Coating, X-ray optics, Silicon, Ion implantation, X-rays, Thin films, Ions, Iridium

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Proceedings Article | 9 September 2016 Presentation + Paper

Shaping Si, NiCo, and glass substrates via stresses in the coatings

Xiaoli Wang, Youwei Yao, Shi Ye, Tianchen Liu, Lahsen Assoufid, Jian Cao, M. Ulmer

Proceedings Volume 9965, 99650D (2016) https://doi.org/10.1117/12.2237785

KEYWORDS: Silicon, Optical coatings, Glasses, Magnetism, X-ray optics, Mirrors, X-ray astronomy, X-rays, Thin film coatings, X-ray telescopes

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Proceedings Article | 11 July 2016 Paper

Gas bearing slumping and figure correction of x-ray telescope mirror substrates

Brandon Chalifoux, Heng Zuo, Graham Wright, Youwei Yao, Ralf Heilmann, Mark Schattenburg

Proceedings Volume 9905, 990522 (2016) https://doi.org/10.1117/12.2232500

KEYWORDS: Mirrors, Glasses, X-rays, Mirrors, Glasses, X-ray telescopes, X-ray optics, Spatial resolution, X-rays, Space telescopes, Telescopes, Multilayers, Prototyping

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Proceedings Article | 4 September 2015 Paper

Stress manipulated coating for figure reshape of light weight X-ray telescope mirrors

Youwei Yao, Xiaoli Wang, Jian Cao, Michael Graham, Semyon Vaynman, Shannon Grogans, Yifang Cao, Melville Ulmer

Proceedings Volume 9603, 96031J (2015) https://doi.org/10.1117/12.2186146

KEYWORDS: Coating, Mirrors, Aluminum, X-ray telescopes, Glasses, X-ray optics, Sputter deposition, X-rays, Chromium, Annealing

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Proceedings Article | 4 September 2015 Paper

Investigation of magnetically smart films applied to correct the surface profile of light weight X-ray optics in two directions

Xiaoli Wang, Youwei Yao, Jian Cao, Semyon Vaynman, Michael Graham, Tianchen Liu, M. Ulmer

Proceedings Volume 9603, 96031O (2015) https://doi.org/10.1117/12.2187070

KEYWORDS: Magnetism, Glasses, Finite element methods, X-ray optics, Mirrors, Coating, X-rays, Data modeling, Sputter deposition, Smart materials

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Proceedings Article | 5 September 2014 Paper

Comparisons of the deflections of magnetically smart films on alloy of NiCo and glass substrates

Melville Ulmer, Xiaoli Wang, Peter Knapp, Jian Cao, Yifang Cao, Tyler Karian, Shannon Grogans, Michael Graham, Semyon Vaynman, Youwei Yao

Proceedings Volume 9208, 920808 (2014) https://doi.org/10.1117/12.2062008

KEYWORDS: Magnetism, Glasses, X-ray optics, Mirrors, Sputter deposition, X-ray astronomy, X-ray telescopes, Statistical analysis, Smart materials, Magnetostrictive materials

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Proceedings Article | 26 September 2013 Paper

Improvements of design scheme and fabrication of the hard x-ray supermirror with broad bandwidth and flattop response

Youwei Yao, Hideyo Kunieda

Proceedings Volume 8861, 886114 (2013) https://doi.org/10.1117/12.2023758

KEYWORDS: Reflectivity, X-rays, Hard x-rays, Multilayers, Platinum, X-ray telescopes, X-ray optics, Calibration, Reflectors, Detection and tracking algorithms

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Proceedings Article | 30 April 2009 Paper

Angle alignment method for soft x-ray using double-periodic multilayer

Baozhong Mu, Li Jiang, Shengzhen Yi, Jingtao Zhu, Xin Wang, Qiushi Huang, Moyan Tan, Xiaoqiang Wang, Jing Xu, Youwei Yao, Yi Huang, Hongying Liu, Zhanshan Wang, Lingyan Chen

Proceedings Volume 7360, 73600M (2009) https://doi.org/10.1117/12.820554

KEYWORDS: X-rays, Microscopes, X-ray imaging, Reflectivity, Grazing incidence, X-ray optics, Diagnostics, Zemax, Mirrors, Geometrical optics

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Showing 5 of 22 publications

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