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IDEA / ACTIVE CAVITIES

Spin, gain & laser dynamics

Which polarization lases, and will it remain stable?

Editorial synthesis by the site author across the reading notes below. It is an interpretation, not a finding reported by any single paper. Each note keeps the authors’ findings separate from commentary and links the original source.

Working summary

Carrier-spin populations, birefringence, gain anisotropy and optical coupling shape polarization switching and oscillations. A cavity calculation supplies modes and losses; a dynamical model describes their competition.

Connections

Extended spin-flip models connect anisotropic cavity optics to non-Hermitian dynamics. Photonic lattices add extended spatial modes to spin-selective gain.

Draws on the reading notes for: Anisotropy changes the laser dynamics, Carrier spin meets collective modes, Spin control in a commercial VCSEL.

Questions and limits

Optical spin injection is not electrical injection. Photon helicity, photonic spin–orbit effects and carrier spin are related concepts with different physical meanings.

SOURCES

Referenced articles

Ordered by publication year. A shared theme does not imply direct citation or historical influence.

2005 / Theory & simulationPreprint

The spin-dependent semiconductor Bloch equations: a microscopic theory of Bir-Aronov-Pikus spin-relaxation

C. Lechner & U. Rössler

Extends semiconductor Bloch equations with spin and electron–hole exchange beyond a Hartree–Fock truncation.

Summary & commentary : The spin-dependent semiconductor Bloch equations: a microscopic theory of Bir-Aronov-Pikus spin-relaxation
2023 / Theory & simulation

Spin vertical-cavity surface-emitting lasers with linear gain anisotropy: Prediction of exceptional points and nontrivial dynamical regimes

M. Drong, J. Peřina Jr., T. Fördös, H. Y. Jaffrès, K. Postava & H.-J. Drouhin

Extends the spin-flip model and studies polarization dynamics near exceptional points.

Summary & commentary : Spin vertical-cavity surface-emitting lasers with linear gain anisotropy: Prediction of exceptional points and nontrivial dynamical regimes
2025 / Experiment

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

Room temperature spin injection into commercial VCSELs at non-resonant wavelengths

T. Almabetov, P. Androvitsaneas, Z. Ren, A. Young, R. Oulton & E. Harbord

Pumps at 794 and 810 nm and measures the resulting polarization response at room temperature.

Summary & commentary : Room temperature spin injection into commercial VCSELs at non-resonant wavelengths
2026 / Experiment

Dynamical Control of Non-Hermitian Coupling between Subthreshold Nanolasers Enables Q-Switched Pulse Generation

K. Seegert, R. Gajardo, G. Huyet, F. Raineri & G. Madiot

Uses asymmetric optical pumping of waveguide-coupled InP nanocavities and a carrier rate-equation model.

Summary & commentary : Dynamical Control of Non-Hermitian Coupling between Subthreshold Nanolasers Enables Q-Switched Pulse Generation
2026 / Numerical method

Efficient First-Principles Inverse Design of Nanolasers

B. Martinez de Aguirre Jokisch, A. Cerjan, R. E. Christiansen, J. Mørk, O. Sigmund & S. G. Johnson

Combines SALT, high-Q perturbation theory and coupled-mode theory into a reciprocal-solve objective.

Laser & Photonics Reviews · 20, e01614 · online 23 MarchOriginal publication ↗: Efficient First-Principles Inverse Design of Nanolasers
Summary & commentary : Efficient First-Principles Inverse Design of Nanolasers

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