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Direct bandgap photoluminescence in the 3–5 um wavelength window is demonstrated from GeSn microdisks, suggesting that GeSn alloys are well suited for mid-infrared integrated gas sensors on Si chips.

After the discovery of the Higgs boson in 2012 a key question is whether it is the only one. The minimal supersymmetric standard model (MSSM) includes five physical Higgs bosons, three of them neutral. ATLAS has just published a search for a second neutral one decaying to tau pairs, covering a wide mass range above that of the discovered one using data collected in the years 2015 and 2016. This is the most sensitve search for such an MSSM Higgs yet.

We propose a suitable explanation for Germanium Tin epitaxial heterostructures temperature-dependent photoluminescence that is based upon the so far disregarded optical activity of dislocations.

Collaboration between the the Universidad Politecnica de Madrid, University of Birmingham and the Warwick XPS Facility has studied the evolution of surface chemistry and the associated wettability of laser-patterned aluminum alloys under abient conditions.