Low-dimensional quantum materials, including quantum dots, one-dimensional nanowires, two-dimensional van der Waals crystals, quantum wells, and their engineered heterostructures, provide a versatile platform for exploring light–matter interactions beyond conventional bulk materials. Owing to reduced dimensionality, enhanced quantum confinement, pronounced excitonic effects, and highly tunable electronic structures, these systems exhibit rich optical phenomena, including excitons, polaritons, plasmons, nonlinear optical responses, quantum emission, and moiré-engineered optical states.

This Collection aims to highlight recent advances in the optical properties and light–matter coupling mechanisms of low-dimensional quantum materials. Topics of interest include excitonic physics, infrared and terahertz optical responses, nonlinear optics, ultrafast carrier dynamics, polaritonic effects, and optical phenomena tunable by strain, twist, pressure, electric fields, or other external stimuli. We welcome both experimental and theoretical studies that reveal new physical mechanisms, develop advanced spectroscopic techniques, or demonstrate novel photonic and optoelectronic device concepts.

This Collection supports and amplifies research related to SDG 9.

Keywords: Low-dimensional Quantum Materials; Light–matter Interactions; Two-dimensional Materials; van der Waals Heterostructures; Quantum Dots; Excitons and Polaritons; Plasmonics; Moiré Materials; Terahertz Photonics; Nonlinear and Ultrafast Optics; Ultrafast Carrier Dynamics; Quantum Photonics

High pressure has emerged as a powerful tool to manipulate structural, electronic, and vibrational properties in condensed matter systems, frequently giving rise to novel superconducting phases. This collection focuses on recent advances in pressure-induced superconductivity and related phenomena in quantum materials.

We welcome experimental, theoretical, and computational contributions, including first-principles investigations and mechanism-driven studies, particularly those addressing electron–phonon coupling and the discovery and characterization of superconductors under high pressure.

Topics include, but are not limited to:

• Pressure-induced superconductivity in diverse material systems

• Electron–phonon coupling and superconducting mechanisms

• First-principles modeling and computational materials design

• Structural and electronic phase transitions under pressure

• Advances in high-pressure synthesis and characterization

By bringing together diverse perspectives, this collection aims to deepen our understanding of how pressure can be harnessed to reveal, tune, and control superconductivity in condensed matter systems.

This Collection supports and amplifies research related to SDG 9.

Keywords: Superconductivity; Pressure-Induced Superconductivity; High-Pressure Physics; Quantum Materials; Electron–Phonon Coupling; First-Principles Calculations; Electronic Structure; Crystal Structure; Structural and Electronic Phase Transitions; Hydride Superconductors