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   https://doi.org/10.1021/acs.jpcc.0c04143  

   Alkhaldi, Hanof ; Kroll, Peter ( October 2020 , The Journal of Physical Chemistry C)

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2. Computing the iron–nitrogen phase diagram at high pressure and high temperature

   https://doi.org/10.1016/j.jallcom.2021.163533  

   Alkhaldi, Hanof ; Kroll, Peter ( April 2022 , Journal of Alloys and Compounds)
3. Linear Insertion Deletion Codes in the High-Noise and High-Rate Regimes

   Cheng, Kuan ; Jin, Zhengzhong ; Li, Xin ; Wei, Zhide ; Zheng, Yu ( July 2023 , Leibniz international proceedings in informatics)
4. High-contrast, high-angular resolution view of the GJ 367 exoplanet system

   https://doi.org/10.1093/mnras/stac961  

   Brandner, Wolfgang ; Calissendorff, Per ; Frankel, Neige ; Cantalloube, Faustine ( April 2022 , Monthly Notices of the Royal Astronomical Society)

   We search for additional companions in the GJ 367 exoplanet system and aim to better constrain its age and evolutionary status. We analyse high-contrast direct imaging observations obtained with HST/NICMOS, VLT/NACO, and VLT/SPHERE. We investigate and critically discuss conflicting age indicators based on theoretical isochrones and models for Galactic dynamics. A comparison of GAIA EDR3 parallax and photometric measurements with theoretical isochrones suggests a young age ≤60 Myr for GJ 367. The star’s Galactic kinematics exclude membership to any nearby young moving group or stellar stream. Its highly eccentric Galactic orbit, however, is atypical for a young star. Age estimates considering Galactic dynamical evolution are most consistent with an age of 1–8 Gyr. We find no evidence for a significant mid-infrared excess in the WISE bands, suggesting the absence of warm dust in the GJ 367 system. The direct imaging data provide significantly improved detection limits compared to previous studies. At 530 mas (5 au) separation, the SPHERE data achieve a 5σ contrast of 2.6 × 10−6. The data exclude the presence of a stellar companion at projected separations ≥0.4 au. At projected separations ≥5 au we can exclude substellar companions with a mass ≥1.5 MJup for an age of 50 Myr, and ≥20 MJup for an age of 5 Gyr. By applying the stellar parameters corresponding to the 50 Myr isochrone, we derive a bulk density of ρplanet = 6.2 g cm−3 for GJ 367 b, which is 25 per cent smaller than a previous estimate.

    

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5. High-efficiency high-numerical-aperture metalens designed by maximizing the efficiency limit

   https://doi.org/10.1364/OPTICA.514907  

   Li, Shiyu ; Lin, Ho-Chun ; Hsu, Chia_Wei ( March 2024 , Optica)

   Theoretical bounds are commonly used to assess the limitations of photonic design. Here we introduce a more active way to use theoretical bounds, integrating them into part of the design process and identifying optimal system parameters that maximize the efficiency limit itself. As an example, we consider wide-field-of-view high-numerical-aperture metalenses, which can be used for high-resolution imaging in microscopy and endoscopy, but no existing design has achieved a high efficiency. By choosing aperture sizes to maximize an efficiency bound, setting the thickness according to a thickness bound, and then performing inverse design, we come up with high-numerical-aperture (NA=0.9) metalens designs with, to our knowledge, record-high 98% transmission efficiency and 92% Strehl ratio across all incident angles within a 60° field of view, reaching the maximized bound. This maximizing-efficiency-limit approach applies to any multi-channel system and can help a wide range of optical devices reach their highest possible performance.

    

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