Figure 1
From: Four-dimensional light shaping: manipulating ultrafast spatiotemporal foci in space and time
(a) Effect of a linear phase gradient on the SSTF focus. Images show simulated results of space–time (x, t) intensity variations of temporal foci. Left to right: no phase gradient, linear phase causing negative shift, linear phase causing positive shift. (b) Plot of lateral spatial shift versus on-axis temporal delay for an SSTF focus, with a varying magnitude of linear spectral phase applied. (c) Sketch illustrating the principle for creating a three-dimensional multiple SSTF array. The z-direction is the optical axis (light penetrating into the sample). (d) Experimental system for four-dimensional light shaping (a full diagram is provided in Supplementary Information Figure S1). (e) Sketch representing the relationship between ‘conventional focus’ and ‘SSTF’, as well as ‘single focus’ and ‘holographic 3D multiplexed’. SLM: Spatial Light Modulator.
