  Over the past 36 years much research has been carried out on Bessel beams
(BBs) owing to their peculiar properties, viz non-diffraction behavior,
self-healing nature, possession of well-defined orbital angular momentum with
helical wave-front, and realization of smallest central lobe. Here, we provide
a detailed tutorial review on BBs from their inception to recent developments.
We outline the fundamental concepts involved in the origin of the BB. The
theoretical foundation of these beams was described and then their experimental
realization through different techniques was explored. We provide an elaborate
discussion on the different kinds of structured modes produced by the BB. The
advantages and challenges that come with the generation and applications of the
BB are discussed with examples. This tutorial review provides reference
material for readers who wish to work with non-diffracting modes and promotes
the application of such modes in interdisciplinary research areas.
