A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessionl75408mkctlh3c5bqd491dold6jild00): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

Spatiotemporal Steering of Nondiffracting Wave Packets. | LitMetric

Spatiotemporal Steering of Nondiffracting Wave Packets.

Phys Rev Lett

Stanford University, Ginzton Laboratory and Department of Electrical Engineering, Stanford, California 94305, USA.

Published: February 2025

We study the dynamics of space-time nondiffracting wave packets, commonly known as light bullets, in a spatiotemporally varying medium. We show that by spatiotemporal refraction, a monochromatic focused beam can be converted to a light bullet that propagates at a given velocity. By further designing the index profile of the spatiotemporal boundary, the group velocity and the propagation direction of the light bullet can be engineered in a programmable way. All effects mentioned above cannot be achieved by spatial or temporal boundaries, and are only possible with spatiotemporal boundaries. These findings provide unique ways to engineer the dynamics of electromagnetic wave packets in space-time. Such wave packets with engineered space-time trajectory may find potential applications in the spatiotemporal control of material properties or particles, or for use as a way to emulate relativistic physics in the laboratory.

Download full-text PDF

Source
http://dx.doi.org/10.1103/PhysRevLett.134.073803DOI Listing

Publication Analysis

Top Keywords

wave packets
16
nondiffracting wave
8
light bullet
8
spatiotemporal
5
spatiotemporal steering
4
steering nondiffracting
4
wave
4
packets
4
packets study
4
study dynamics
4

Similar Publications

In Situ Imaging of a Single-Atom Wave Packet in Continuous Space.

Phys Rev Lett

February 2025

Sorbonne Université, Laboratoire Kastler Brossel, ENS-Université PSL, CNRS, Collège de France, 24 rue Lhomond, 75005, Paris, France.

We report on the imaging of the in situ spatial distribution of deterministically prepared single-atom wave packets as they expand in a plane, finding excellent agreement with the scaling dynamics predicted by the Schrödinger equation. Our measurement provides a direct and quantitative observation of the textbook free expansion of a one-particle Gaussian wave packet, which we believe has no equivalent in the existing literature. Second, we utilize these expanding wave packets as a benchmark to develop a protocol for the controlled projection of a spatially extended wave function from continuous space onto the sites of a deep optical lattice and subsequent single-atom imaging using quantum gas microscopy techniques.

View Article and Find Full Text PDF

Weakly Dispersive Band in Synthetic Moiré Superlattice Inducing Optimal Compact Comb Generation.

Phys Rev Lett

February 2025

State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.

The moiré superlattices attract growing interest for holding exotic physics due to their fascinating properties from electronics to photonics. Much attention has been focused on the localization effect for waves in the flat band regime or the delocalization effect from the strongly dispersive band feature. Here, we study the weakly dispersive band in between the two above scenarios in a one-dimensional synthetic frequency moiré superlattice and observe the wave packet distributions therein toward novel frequency comb generation.

View Article and Find Full Text PDF

The diffraction-free property of space-time wave packets has led to an abundance of interest in the field of optical physics. This feature may also find utility in applications for biomedical optics. Specifically, the programmability of the space-time light sheet can yield µm-thick light sheets with widths that resist diffraction in free space over several millimeters, whereas similarly sized Airy, Bessel, or Gaussian light sheets diverge significantly when focused to reach comparable widths.

View Article and Find Full Text PDF

The ladder-type population transfer of the HF molecule steered by four-color harmonic laser pulses (HLPs) is investigated using the time-dependent quantum wave packet method. It is found that although there exist large background excitations and many (resonant) transition pathways during the driving, nearly 100% of the population could be transferred to the target state. In particular, such a process could be coherently controlled by changing the phases of the four HLPs, especially the phases of the fundamental and second HLPs, which can be accounted for in large part by the combined effects of the corresponding transition pathways and the maximal amplitude of the total electric field.

View Article and Find Full Text PDF

Global diabatic potential energy surfaces (PESs) of the HS system, corresponding to the 1A″ and 2A″ electronic states, were built by using the neural network method. In ab initio calculations, the aug-cc-pVTZ basis set and MRCI-F12 method were adopted. The topographic features of the new diabatic PESs were discussed and compared with the available theoretical and experimental results in detail.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!