We developed a simple and compact approach for generating propagation-invariant optical bottle beams by illuminating a binary-axicon-originated zero-order modified Bessel beam onto a flat diffractive lens that dynamically performs three-dimensional longitudinal interference shaping while extending the focus with high efficiency. As a result, micron-sized nondiffracting optical beams exhibit a chain of high-contrast dark and bright regions. These remarkable effects can't be demonstrated with traditional focusing lenses commonly used for laser focusing. The resulting nondiffracting optical bottle beams generated by this novel experimental technique can offer promising advantages for applications such as imaging, particle manipulation, optical tweezers, and nonlinear light-matter interaction experiments.

This novel, high-quality research was completed in collaboration with research groups in the USA, India and Japan, and we published this paper work in the high-impact, reputable journal ACS Photonics. 

“Heavy Congratulations to the team from Quantlight and high harmonics lab Pvt. Ltd.”

ACS Photonics 2026, 13, 1354−1367

https://pubs.acs.org/doi/10.1021/acsphotonics.5c02547