  Control of structured light is of great importance to explore fundamental
physical effects and extend practical scientific applications, which has been
advanced by accepting methods of quantum optics - many classical analogies of
exotic quantum states were designed using structured modes. However, the
prevailing quantum-like structured modes are limited by discrete states where
the mode index is analog to the photon number state. Yet, beyond discrete
states, there is a broad range of quantum states to be explored in the field of
structured light -- continuous-variable (CV) states. As a typical example of CV
states, squeezed state plays a prominent role in high-sensitivity
interferometry and gravitational wave detection. In this work, we bring
together two seemingly disparate branches of physics, namely, classical
structured light and quantum squeezed state. We propose the structured light
analogy of squeezed state (SLASS), which can break the spatial limit following
the process of surpassing the standard quantum limit (SQL) with quantum
squeezed states. This work paves the way for adopting methods from CV quantum
states into structured light, opening new research directions of CV
entanglement, teleportation, classical and quantum informatics of structured
light in the future.
