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Investigating group-velocity-tunable propagation-invariant optical wave-packets
Zhaoyang Li1,2, Yanqi Liu3, Yuxin Leng3
1Zhangjiang Laboratory, 100 Haike Road, Pudong, 201210, Shanghai, China. lizy@zjlab.ac.cn.
Scientific Reports
|September 28, 2022
Summary
Control the group-velocity of light wave-packets using pulse-front deformation. This method allows for programmable superluminal and subluminal speeds, offering new possibilities in optical physics.
Area of Science:
- * Physics, Optics, Wave Phenomena
Background:
- * Propagation-invariant optical wave-packets are crucial for various applications.
- * Controlling the group-velocity (speed of wave-packet propagation) is a key challenge.
Purpose of the Study:
- * Investigate methods to generate and control the group-velocity of propagation-invariant optical wave-packets.
- * Explore the underlying mechanisms for tunable group-velocity in physical and Fourier spaces.
- * Clarify the relationship between these wave-packets and space-time wave-packets.
Main Methods:
- * Generation of propagation-invariant optical wave-packets via conical superposition.
- * Introduction of arbitrarily-axisymmetric pulse-front deformation.
- * Analysis of group-velocity tunability in physical and Fourier domains.
Main Results:
- * Demonstrated control over group-velocity, enabling superluminal, subluminal, accelerating, and decelerating propagation.
- * Identified mechanisms for precise group-velocity manipulation through pulse-front engineering.
- * Established that these tunable wave-packets are a subset of space-time wave-packets.
Conclusions:
- * Arbitrarily-axisymmetric pulse-front deformation offers a powerful method for controlling optical wave-packet group-velocity.
- * The findings provide a deeper understanding of the generation and tunability mechanisms.
- * This work links propagation-invariant wave-packets to the broader framework of space-time wave-packets.
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