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Continuous Charge Distributions01:17

Continuous Charge Distributions

Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Published on: June 8, 2018

Supercontinuum optical vortex pulse generation without spatial or topological-charge dispersion.

Yu Tokizane1, Kazuhiko Oka, Ryuji Morita

  • 1Department of Applied Physics, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo 060-8628, Japan. tokizane@eng.hokudai.ac.jp

Optics Express
|August 19, 2009
PubMed
Summary
This summary is machine-generated.

A novel achromatic method generates broadband optical vortex pulses (500-800 nm) without dispersion. This technique is valuable for advanced spectroscopy in topological materials.

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Area of Science:

  • Optics and Photonics
  • Condensed Matter Physics

Background:

  • Optical vortices possess unique phase and polarization properties.
  • Generating broadband optical vortices without dispersion is challenging.
  • Applications in nonlinear spectroscopy require ultrabroadband vortex pulses.

Purpose of the Study:

  • To propose and demonstrate a new achromatic method for generating supercontinuum optical vortices.
  • To investigate the polarization evolution within the system.
  • To enable applications in time-resolved nonlinear spectroscopy.

Main Methods:

  • Development of an achromatic optical vortex generation technique.
  • Experimental demonstration of supercontinuum optical vortex generation (500-800 nm).
  • Analysis of polarization evolution using Jones vectors and matrices.

Main Results:

  • Successful generation of broadband optical vortex pulses (500-800 nm) without spatial or topological-charge dispersion.
  • Elucidation of the polarizer's role in polarization transfer.
  • Demonstration of a robust method for creating ultrabroadband optical vortex pulses.

Conclusions:

  • The proposed achromatic method effectively generates broadband optical vortices.
  • The system allows for precise control over polarization.
  • This technique is suitable for time-resolved nonlinear spectroscopy on topological materials.