Non-local correlation interference with pseudo-thermal light

• Denser and sparser interference patterns are observed experimentally.
• Nonlocal subwavelength diffraction is achieved by correlation measurement.
• The relation of interference fringes’ width is concluded.

We report an experimental demonstration of non-local correlation interference with a pseudo-thermal light source. The experimental results show denser and sparser interference effects compared to classical interference. Our experimental result suggests that denser lithography and imaging can also be achieved with correlation method.