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Related Concept Videos

Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...

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Related Experiment Video

Updated: Jul 4, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
10:54

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

Spontaneous emission control in high-extraction efficiency plasmonic crystals.

Hideo Iwase1, Dirk Englund, Jelena Vuckovic

  • 1Ginzton Laboratory, Stanford University, California, 94305, USA. Hideo.Iwase@stanford.edu

Optics Express
|June 4, 2008
PubMed
Summary

We enhanced photoluminescence (PL) in hexagonal plasmonic crystals by coupling excitons to surface plasmon polariton (SPP) modes. This significantly shortens radiative decay time, enabling applications in lasers and sensors.

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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

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Last Updated: Jul 4, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
09:29

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

Area of Science:

  • Materials Science
  • Optoelectronics
  • Condensed Matter Physics

Background:

  • Surface plasmon polaritons (SPPs) are crucial for nanoscale light manipulation.
  • Exciton-plasmon coupling offers pathways to enhance light-matter interactions.
  • Hexagonal plasmonic crystals provide unique photonic properties.

Purpose of the Study:

  • To investigate exciton-field coupling in waveguide-confined (WC) anti-symmetric SPP modes.
  • To analyze the impact of coupling on radiative decay time and photoluminescence (PL) emission.
  • To explore potential applications in optoelectronic devices.

Main Methods:

  • Experimental fabrication of InP-TiOAu-TiO-Si heterostructures.
  • Theoretical modeling of exciton-SPP coupling in hexagonal plasmonic crystals.
  • Measurement of radiative decay time for InP-based transverse magnetic (TM)-strained multi-quantum well (MQW) structures.

Main Results:

  • Observed a 2.9-3.7 times shorter radiative decay time for coupled MQW compared to bare MQW.
  • Theoretically determined that 80% of enhanced PL is emitted into SPP modes.
  • Identified 17% of enhanced PL redirection into WC-anti-symmetric modes.

Conclusions:

  • Demonstrated efficient exciton-field coupling to SPP and WC modes.
  • The enhanced PL and shortened decay time show potential for advanced photonic devices.
  • This work is relevant for high-temperature SPP lasers, integrated photo-electrical devices, and biosensors.