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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Related Experiment Video

Updated: May 12, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Ultrasensitive N-photon interferometric autocorrelator.

Zili Zhou1, Giulia Frucci, Francesco Mattioli

  • 1COBRA Research Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. z.zhou@tue.nl

Physical Review Letters
|April 16, 2013
PubMed
Summary

We developed a new, highly sensitive method using superconducting nanodetectors to measure interferometric autocorrelation. This technique offers superior efficiency and temporal resolution for advanced optical measurements.

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Area of Science:

  • Physics
  • Materials Science
  • Quantum Optics

Background:

  • Interferometric autocorrelation is crucial for characterizing ultrashort optical pulses.
  • Existing methods often lack sensitivity or rely on less efficient all-optical nonlinearities.
  • Superconducting nanodetectors offer unique properties for sensitive photodetection.

Purpose of the Study:

  • To introduce a novel method for measuring Nth-order (N=1-4) interferometric autocorrelation.
  • To achieve high sensitivity and temporal resolution in autocorrelation measurements.
  • To leverage the advantages of superconducting nanodetectors for enhanced efficiency.

Main Methods:

  • Combining linear absorption and nonlinear detection within a superconducting nanodetector.
  • Utilizing NbN (Niobium Nitride) films for detector fabrication.
  • Directly measuring the quasiparticle energy relaxation time as the limiting factor for temporal resolution.

Main Results:

  • Demonstrated a novel method for Nth-order interferometric autocorrelation measurement.
  • Achieved significantly higher detection efficiency compared to all-optical nonlinearity methods.
  • Determined the temporal resolution limit to be in the 20 picosecond range, dictated by quasiparticle relaxation time in NbN.

Conclusions:

  • The developed method provides a highly sensitive and time-resolved approach to interferometric autocorrelation.
  • Superconducting nanodetectors offer a more efficient alternative to traditional optical nonlinearity-based techniques.
  • The method's temporal resolution is fundamentally limited by material properties, offering a direct pathway for further improvement.