Temporal waveguiding in modulated 2D lattices

J. Santini; E. Riva; F. Braghin

doi:10.1117/12.2612352

20 April 2022 Temporal waveguiding in modulated 2D lattices

J. Santini, E. Riva, F. Braghin

Proceedings Volume 12043, Active and Passive Smart Structures and Integrated Systems XVI; 1204307 (2022) https://doi.org/10.1117/12.2612352
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

In this work we investigate the transient dynamics of time modulated 2D spring-mass lattices. We show that a suitable temporal modulation of the stiffness parameters can be employed to functionally steer waves in the 2D space. This is accomplished by tailoring the group velocity profile associated with the unit lattice. We firstly derive the necessary modulation conditions to establish an adiabatic variation of the propagation direction for a wave packet, which allows for a reflection-free waveguiding. Then, we show a number of numerical examples to illustrate the limitations of such a strategy and how the performances are affected by non-adiabatic temporal modulations.

Conference Presentation

Citation Download Citation

J. Santini, E. Riva, and F. Braghin "Temporal waveguiding in modulated 2D lattices", Proc. SPIE 12043, Active and Passive Smart Structures and Integrated Systems XVI, 1204307 (20 April 2022); https://doi.org/10.1117/12.2612352

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