About CLEO
CLEO is a premier scientific conference focused on research and applications in photonics and electro-optics. Bringing together an international scientific community and industry, CLEO is known for its high-quality technical program and unparalleled opportunities to network with researchers at the forefront of photonics and with companies from across the globe.

Contributed Paper Notifications
If you submitted a contributed paper for CLEO 2026, notification of acceptance or rejection will be sent in late February 2026.

Post-Deadline Abstract Submissions — CLEO 2026
Post-deadline abstract submissions for CLEO 2026 will open on 9 March 2026. Post-deadline papers provide an opportunity to present late-breaking, high-impact results obtained after the regular submission deadline—work of exceptional significance that warrants immediate dissemination rather than waiting for a future conference.

All post-deadline submissions will be peer-reviewed by the CLEO Technical Program Committee, and only a limited number of outstanding abstracts will be accepted for presentation.

DEADLINE : 7 APRIL 2026