2024 CAP Congress / Congrès de l'ACP 2024

Session

(DCMMP) T1-7 Light Matter Interaction | Interaction lumière-matière (DPMCM)

T1-7

28 May 2024, 10:30

Western University

Conveners

(DCMMP) T1-7 Light Matter Interaction | Interaction lumière-matière (DPMCM)

• Mark Sutton

4321. Making braids in non-Hermitian photonic systems

Prof. Kai Wang (McGill University)

28/05/2024, 10:30

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

Invited Speaker / Conférencier(ère) invité(e)

The nontrivial topological features in non-Hermitian systems provide promising pathways to achieve robust physical behaviors in classical or quantum open systems. Recent theoretical work discovered that the braid group characterizes the topology of non-Hermitian periodic systems.
In this talk, I will show our experimental demonstrations of the topological braiding of non-Hermitian band...

4372. (G*) A Theory of Fourth and Fifth Harmonic Generations in Metallic Nanohybrids

Qingzhou Meng

28/05/2024, 11:00

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)

The enhancement of the light-matter interaction through localized surface plasmon resonances (LSPRs) by the heterostructure of noble metal and copper sulfide nanoparticles has aroused wide concern. The higher-order nonlinear process has also gained considerable interest for its efficient enhancement of the harmonic generation process in harmonically resonant heterostructures. In this work, a...

4106. (G) The van der Pol-Duffing Oscillator and its Application to Gain-driven Light-matter Interaction

Chunlei Zhang (University of Manitoba)

28/05/2024, 11:15

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

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

We report the observation of the frequency nonlinearity during amplitude stabilization of the gain-embedded resonator which was previously interpreted as a van der Pol oscillator. Our investigation reveals that this specific nonlinear oscillationn is more accurately described by the van der Pol-Duffing oscillator model. We initially observed this phenomenon in a gain-embedded circuit...

4238. New Capabilities for In-situ and Operando Soft X-ray Spectroscopy at the SGM and SXRMB Beamlines at the Canadian Light Source

Tor Pedersen (Canadian Light Source Inc.)

28/05/2024, 11:30

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

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

The SGM (200 - 2000 eV) and SXRMB (1.7 - 10 keV) spectroscopy beamlines at the Canadian Light Source allow for a variety of novel in-situ and operando measurement techniques. This talk will cover the experimental data acquisition modes available at both beamlines and highlight the ways in which their unique capabilities allow for answering specific scientific questions. The emphasis will be on...

4298. Light-induced dc currents in materials with $C_{4n}\mathcal{K}$ symmetry

Tohid Farajollahpour (Brock University)

28/05/2024, 11:45

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

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

Berry curvature manifests as current responses to applied electric fields. When time reversal is broken, a Berry curvature ''monopole'' gives rise to a Hall current that is proportional to the applied field. When time reversal is preserved, a Berry curvature ''dipole'' may result in a Hall current that is second order in the applied field. In this work, we examine a current response arising...