Self-organized optofluidic locking enables stable single-frequency lasing in dynamic liquid media.

Self-organized optofluidic locking stabilizes single-frequency lasing in liquid media, achieving over 31 dB side-mode suppression and 0.051 nm linewidth.

• Why it matters: Liquid-state lasers face instability due to fluid dynamics and refractive-index fluctuations, limiting their practical use as stable, tunable light sources.
• What they did: The researchers used a weak continuous-wave optical field to induce collective particle migration and reorientation in anisotropic colloidal nanoplatelets, creating a self-organized gain landscape that suppresses cavity fluctuations.
• The result: This approach enhances output stability by nearly three orders of magnitude, reduces lasing threshold by over 75%, and enables wavelength-tunable, single-frequency lasing suitable for advanced photonic applications.