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ARTICLE SUMMARY / 2025

Ultracompact multibound-state-assisted flat-band lasers

J. Cui, S. Han, B. Zhu … Q. J. Wang (10 authors)

Nature Photonics · 19, 643–649 · online 28 April

Summary

Can flat-band and bound-state engineering reduce the size of a photonic-crystal laser?

Combines modal confinement and radiation suppression in a THz quantum-cascade platform.

Demonstrates electrically pulsed lasing in the fabricated structures.

Commentary

The measurements are cryogenic, around 8.6 K, and in the THz range—not a room-temperature near-IR VCSEL.

Shares modal-engineering ideas with PCSELs, but not their complete materials or operating conditions.

Interpretation and connections in this note, separate from the authors’ reported findings.

Related modelling approaches

Relation labels come from the method guide and are editorial. Unlabelled links are conceptual connections or comparison methods; the paper does not necessarily implement them.

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Modeling Self-Heating in High-Power Single-Mode Phase-Coupled Linear VCSEL Arrays

V. Torrelli, M. C. G. Alasio, M. D’Alessandro … P. Debernardi (9 authors)

Models heat sources and the connection between temperature, thermal lensing and optical modes.

Summary & commentary : Modeling Self-Heating in High-Power Single-Mode Phase-Coupled Linear VCSEL Arrays
2025 / Experiment

Frequency-modulated high-power photonic-crystal surface-emitting lasers for long-distance coherent free-space optical communications

Takuya Inoue, Ryohei Morita, Shota Ishimura … Susumu Noda (10 authors)

Uses two photonic-crystal sections with slightly different resonances and anti-phase current injection.

Summary & commentary : Frequency-modulated high-power photonic-crystal surface-emitting lasers for long-distance coherent free-space optical communications