Related Experiment Video
Updated: Jun 8, 2026
06:16
Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
Published on: April 25, 2019
Space-time focusing of Bessel-like pulses
M Clerici1, D Faccio, E Rubino
1CNISM and Dipartimento di Fisica e Matematica, Università dell’Insubria, Via Valleggio 11, 22100 Como, Italy.
Optics Letters
|October 5, 2010
Summary
We developed a novel space-time compression technique for independent control of light pulse dynamics. This method achieves significant temporal compression and precise spatial localization in free space.
Area of Science:
- Optics and Photonics
- Ultrafast Science
- Beam Shaping
Background:
- Controlling light pulse dynamics in both time and space is crucial for advanced applications.
- Existing methods often struggle with independent manipulation of longitudinal and transverse properties.
- Spatial beam shaping offers potential for novel light field control.
Purpose of the Study:
- To introduce and experimentally validate a space-time compression technique.
- To demonstrate independent control over longitudinal (temporal) and transverse (spatial) pulse properties.
- To achieve high degrees of temporal compression and spatial localization.
Main Methods:
- Utilizing spatial beam shaping to engineer the light field.
- Implementing a novel space-time compression methodology.
- Experimental propagation in free space to observe effects.
Main Results:
- Demonstrated complete and independent control of longitudinal dynamics.
- Achieved independent control of transverse pulse localization.
- Experimentally observed strong temporal compression.
- Observed high transverse localization, on the order of a few wavelengths.
Conclusions:
- The developed space-time compression technique enables unprecedented control over light pulse properties.
- This technique allows for simultaneous temporal compression and precise spatial localization.
- The findings have implications for ultrafast optics and light field manipulation.
Related Concept Videos
01:17NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
01:17Bandpass Sampling
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2. The spectrum...
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2. The spectrum...
01:16Properties of Laplace Transform-II
Time differentiation, convolution, integration, and periodicity are fundamental concepts in analyzing functions and signals over time. Each concept provides a unique perspective on how functions evolve, interact, and repeat, offering essential tools for various scientific and engineering applications.
Time differentiation involves analyzing the rate of change of a function over time. Mathematically, it is the derivative of a function with respect to time. This concept can be likened to tracking...
Time differentiation involves analyzing the rate of change of a function over time. Mathematically, it is the derivative of a function with respect to time. This concept can be likened to tracking...
01:07Basic signals of Fourier Transform
The Fourier Transform is a pivotal mathematical tool in signal processing, enabling the transformation of time-domain signals into their frequency-domain representations. Among the numerous elements within this domain, certain functions like the sinc function, delta function, and exponential signals hold significant importance due to their unique properties and implications.
The sinc function, defined as sinc(x) = sin(πx)/(πx), is particularly notable for its symmetry and behavior at zero. It...
The sinc function, defined as sinc(x) = sin(πx)/(πx), is particularly notable for its symmetry and behavior at zero. It...
02:32The de Broglie Wavelength
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...