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Related Concept Videos

Parallel Resonance01:23

Parallel Resonance

The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
Series Resonance01:17

Series Resonance

The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
Sound Waves: Resonance01:14

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
Resonance in an AC Circuit01:26

Resonance in an AC Circuit

The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...
Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...

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Related Experiment Video

Updated: Jun 21, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Cross resonant optical antenna.

P Biagioni1, J S Huang, L Duò

  • 1Nano-Optics and Biophotonics group, Department of Experimental Physics 5, Wilhelm-Conrad-Röntgen-Center for Complex Material Systems (RCCM), Physics Institute, University of Würzburg, Am Hubland, 97074 Würzburg, Germany. paolo.biagioni@polimi.it

Physical Review Letters
|August 8, 2009
PubMed
Summary
This summary is machine-generated.

We developed a novel cross resonant optical antenna. This device efficiently converts light polarization states, enabling nanoscale control and analysis of light-matter interactions.

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

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Last Updated: Jun 21, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Area of Science:

  • Plasmonics
  • Nanophotonics
  • Optical Antennas

Background:

  • Controlling light polarization is crucial for various optical applications.
  • Nanoscale manipulation of light fields requires advanced antenna designs.

Purpose of the Study:

  • To introduce a novel cross resonant optical antenna design.
  • To demonstrate its capability in converting propagating light polarization states into localized fields and vice versa.

Main Methods:

  • Fabrication of a cross antenna using two perpendicular nanosized gold dipole antennas.
  • Numerical or experimental validation of the antenna's polarization conversion capabilities.

Main Results:

  • The cross antenna successfully converts propagating fields of any polarization into localized, enhanced fields with corresponding polarization.
  • The device functions bidirectionally, converting localized fields back into propagating ones.

Conclusions:

  • The proposed cross resonant optical antenna offers a new platform for controlling light-matter interactions using polarized light.
  • This technology enables nanoscale analysis of polarized optical fields.