Jessica Wade | Search arXiv

arXiv2026

Directional Control of Chiral Polymer Emission Dissymmetry by Plasmonic Metasurfaces

Circularly polarized (CP) emission is central to next-generation photonic and optoelectronic technologies, yet simultaneously controlling its directionality, intensity, and handedness remains a major challenge. Advances in molecular and materials design have enabled strong chiral light-matter interactions and large dissymmetry between opposite CP states. However, conventional thin-film architectures provide limited control over the angular distribution of CP emission and often exhibit strongly angle-dependent chiral emission. Metasurfaces, on the other hand, offer powerful control over emission directionality and polarization, but have predominantly been explored with intrinsically achiral emitters. For the first time, we integrate organic chiral polymer thin films with planar chiral plasmonic metasurfaces to enhance chiral light-matter interactions while controlling the directionality and angular dependence of chiral emission. Using angle-resolved Stokes Fourier polarimetry, we show that metasurface coupling produces directional emission, near-normal dissymmetry factors exceeding 0.7, and, remarkably, direction-dependent reversal of the emission handedness at fixed molecular stereochemistry.

physics.optics↗

arXiv2020

Gender issues in fundamental physics: Strumia's bibliometric analysis fails to account for key confounders and confuses correlation with causation

Alessandro Strumia recently published a survey of gender differences in publications and citations in high-energy physics (HEP). In addition to providing full access to the data, code, and methodology, Strumia (2020) systematically describes and accounts for gender differences in HEP citation networks. His analysis points both to ongoing difficulties in attracting women to high-energy physics and an encouraging-though slow-trend in improvement. Unfortunately, however, the time and effort Strumia (2020) devoted to collating and quantifying the data are not matched by a similar rigour in interpreting the results. To support his conclusions, he selectively cites available literature and fails to adequately adjust for a range of confounding factors. For example, his analyses do not consider how unobserved factors -- e.g., a tendency to overcite well-known authors -- drive a wedge between quality and citations and correlate with author gender. He also fails to take into account many structural and non-structural factors -- including, but not limited to, direct discrimination and the expectations women form (and actions they take) in response to it -- that undoubtedly lead to gender differences in productivity. We therefore believe that a number of Strumia's conclusions are not supported by his analysis. Indeed, we re-analyse a subsample of solo-authored papers from his data, adjusting for year and journal of publication, authors' research age and their lifetime "fame". Our re-analysis suggests that female-authored papers are actually cited more than male-authored papers. This finding is inconsistent with the "greater male variability" hypothesis Strumia (2020) proposes to explain many of his results.

physics.soc-ph↗