Understanding and controlling primary nucleation remains one of the central challenges in crystallization. Nucleation governs the physicochemical, optical, and mechanical properties of the resulting crystals. In this thesis, we investigate a novel pathway for inducing nucleation in supersaturated solutions using the hydrodynamic interaction of laser-induced tandem thermocavitation bubbles confined inside a microcapillary. When two cavitation bubbles are generated in antiphase, their asymmetric pressure fields give rise to micron-scale liquid microjets with velocities far exceeding those produced by single-bubble events. These jets penetrate the primary bubble interface, causing localized evaporation, strong solute redistribution, and transient supersaturation spikes. Using supersaturated aqueous potassium permanganate (KMnO₄) as a model system, we demonstrate that crystallization occurs exclusively under tandem-bubble conditions that produce a high-velocity piercing jet, whereas single-bubble cavitation—even at twice the laser energy—fails to nucleate crystals. The results reveal a clear correlation between jet velocity and nucleation probability, highlighting shear-driven solute transport and microjet-induced evaporation as the dominant mechanisms triggering nucleation. This work establishes microjet-mediated crystallization as a physically grounded and a relatively more energy-efficient alternative to conventional non-photochemical laser-induced nucleation mechanisms, with potential applications in controlled crystallization, microfluidic processing and pharmaceutical manufacturing.