Daniel W. Hewak
University of Southampton
337 Papers
2.5K Citations
Daniel W. Hewak is an academic researcher from University of Southampton. The author has contributed to research in topics: Chalcogenide & Chalcogenide glass. The author has an hindex of 43, co-authored 319 publications. Previous affiliations of Daniel W. Hewak include University of Waterloo.
Chat about Author
Papers
An All‐Optical, Non‐volatile, Bidirectional, Phase‐Change Meta‐Switch
Behrad Gholipour,Jianfa Zhang,Kevin F. MacDonald,Daniel W. Hewak,Nikolay I. Zheludev,Nikolay I. Zheludev +5 more
TL;DR: Non-volatile, bidirectional, all-optical switching in a phase-change metamaterial delivers high-contrast transmission and reflection modulation at near- to mid-infrared wavelengths in device structures down to ≈1/27 of a wavelength thick.
519
Characterization of supercooled liquid Ge2Sb2Te5 and its crystallization by ultrafast-heating calorimetry
TL;DR: Differential scanning calorimetry (DSC) is widely used to study the stability of amorphous solids, characterizing the kinetics of crystallization close to the glass-transition temperature Tg as discussed by the authors.
485
A new family of ultralow loss reversible phase‐change materials for photonic integrated circuits: Sb 2 S 3 and Sb 2 Se 3
TL;DR: S3 and Sb2Se3 as mentioned in this paper, which are reversible alternatives to the standard commercially available chalcogenide PCMs, have been demonstrated as a class of low loss, reversible alternatives.
452
Ultrafast carrier thermalization and cooling dynamics in few-layer MoS2
Zhaogang Nie,Run Long,Run Long,Linfeng Sun,Chung-Che Huang,Jun Zhang,Qihua Xiong,Daniel W. Hewak,Zexiang Shen,Oleg V. Prezhdo,Zhi-Heng Loh +10 more
TL;DR: Nonadiabatic ab initio molecular dynamics simulations, which predict carrier-carrier and carrier-phonon scattering time scales of 40 fs and 0.5 ps, respectively, lend support to the assignment of the observed carrier dynamics.
294
Chalcogenide holey fibres
TL;DR: In this paper, the first non-silica holey or microstructured optical fiber was reported, and the chalcogenide glass gallium lanthanum sulphide was used.