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Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Interference and Superposition of Waves01:07

Interference and Superposition of Waves

When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences

Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and refractory oxide ion...
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
Interference: Path Lengths01:10

Interference: Path Lengths

Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Sound Waves: Interference00:53

Sound Waves: Interference

Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...

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Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions
13:43

Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions

Published on: June 24, 2013

Non-classical interference in integrated 3D multiports.

Thomas Meany1, Michael Delanty, Simon Gross

  • 1Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), MQ Photonics Research Centre, Department of Physics and Astronomy, Macquarie University, North Ryde, 2109 NSW, Australia. thomas.meany@mq.edu.au

Optics Express
|November 29, 2012
PubMed
Summary
This summary is machine-generated.

We fabricated 3D glass multiports using femtosecond lasers. Quantum interference experiments confirmed device performance, showing classical measurements can predict quantum behavior in these integrated photonic devices.

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Area of Science:

  • Quantum optics
  • Integrated photonics
  • Materials science

Background:

  • Multiport interferometers are fundamental components in quantum information processing.
  • Fabrication of complex integrated photonic devices presents significant challenges.

Purpose of the Study:

  • To demonstrate novel three and four-port integrated optical multiports.
  • To characterize the quantum interference properties of these devices.
  • To investigate the relationship between classical and quantum properties.

Main Methods:

  • Fabrication of 3D glass multiports using femtosecond laser direct-write technique.
  • Observation of Hong-Ou-Mandel (HOM) interference.
  • Full quantum characterization via two-photon correlation matrices.

Main Results:

  • Successful fabrication of three and four-input multiports on a 3D glass platform.
  • Observation of HOM interference, confirming quantum behavior.
  • Quantum visibilities for the 3-port device accurately predicted by classical coupling ratios.

Conclusions:

  • Femtosecond laser direct-write is a viable technique for fabricating complex integrated photonic multiports.
  • Classical characterization can provide insights into quantum performance, simplifying device verification.
  • These multiports are promising for quantum information processing applications.