2026 CAP Congress / Congrès de l'ACP 2026

Session

(DCMMP) M2-12 | (DPMCM)

M2-12

22 Jun 2026, 14:15

U. Ottawa - Learning Crossroads (CRX) Building

632. Altered Halide Migration Dynamics in Nanoscale Br–Cl Perovskites under Photoexcitation

Leigh Byrne (Concordia University)

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Mixed-halide perovskites offer exceptional bandgap tunability but suffer
from light-induced halide migration that degrades optical and electronic perfor-
mance. While this phenomenon has been extensively studied in bulk films and
I–Br systems, far less is known about halide migration in nanoscale structures
and Br-Cl systems. We investigate photoinduced halide migration in FAPbBr3-
based...

928. Critical Mg Doping Threshold in Spray-Pyrolyzed SnO₂ Thin Films: Balancing p-Type Conduction and Visible Transparency for Transparent Conducting Oxide Applications.

Abiodun Adeoye (Abiola Ajimobi Technical University, Ibadan. Nigeria)

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral (Non-Student) / Orale (non-étudiant(e))

Transparent conducting oxides require precise doping to balance transparency and conductivity for electronics, photovoltaics, and sensors. This study identifies a critical 4 at.% Mg doping threshold in spray pyrolyzed SnO₂ thin films. Films with 0–8 at.% Mg were deposited from 0.1 M SnCl₄•5H₂O + MgCl₂•6H₂O at 350 ± 5 °C and annealed at 450 °C. X-ray diffraction confirmed rutile phase stability...

831. Measurement of spontaneous two-photon photocurrent in LT-GaAs driven by a bright-squeezed vacuum

Katarzyna Kowalczyk

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral (Non-Student) / Orale (non-étudiant(e))

Until recently, the fields of quantum optics and attosecond science appeared largely incompatible. The latter relies inherently on strong-field interactions, while quantum optics typically operates in single-photon regime. However, the development of high-gain spontaneous parametric down-conversion pumped by femtosecond lasers, has changed this landscape. These bright squeezed vacuum (BSV)...

698. Quality of mid-IR plasmon resonances in highly mismatched alloys

Mr Gavin Frodsham (University of Ottawa)

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Highly mismatched alloys (HMAs) – modified semiconductors with an alloying element that has highly different electronegativity from the host semiconductor elements – are used in solar cells and laser diodes due to their highly tunable band gaps. When the alloying element produces a state near the host conduction band (CB), the CB splits into two bands. It was recently shown that HMAs have...

829. Using nanostructured dielectric surfaces for the generation of nano-focused XUV radiation

Parnia Bastani

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

We introduce an active XUV optical element that simultaneously generates and focuses isolated XUV light to the nanoscale. By illuminating an MgO nanostructured surface with an 800 nm femtosecond laser in transmission, we achieve coherent XUV generation and tight focusing (NA ≈ 0.35). However, IR contamination hampers applications. We suppress it by using p-polarized light at Brewster’s angle...