Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for electronic transitions. As a result...

UV–Vis Spectrometers

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...

The Electromagnetic Spectrum

The Electromagnetic Spectrum

The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...

The Electromagnetic Spectrum

The Electromagnetic Spectrum

Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...

UV–Vis Spectroscopy: Molecular Electronic Transitions

UV–Vis Spectroscopy: Molecular Electronic Transitions

In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this process,...

UV–Vis Spectroscopy of Conjugated Systems

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π&VeryThinSpace;→&VeryThinSpace;π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Anticipating decoherence in quantum systems.

Nature communications·2026

Same author

Enhancing the Purcell Factor and Stability of Nitrogen-Vacancy Centers Coupled to Plasmonic Nanocavities through Dielectric Encapsulation.

Nano letters·2026

Same author

Switchable Polarization in an A-Site Deficient Perovskite through Vacancy and Cation Engineering.

Journal of the American Chemical Society·2026

Same author

Directional enhancement of photoluminescence from phosphor plates with TiO<sub>2</sub> nanoantenna stickers.

Nanophotonics (Berlin, Germany)·2025

Same author

Modelling Purcell enhancement of metasurfaces supporting <i>quasi</i>-bound states in the continuum.

Nanophotonics (Berlin, Germany)·2025

Same author

Machine-learning-assisted photonic device development: a multiscale approach from theory to characterization.

Nanophotonics (Berlin, Germany)·2025

Search research articles

Related Experiment Video

Updated: May 9, 2026

Characterization of Biological Absorption Spectra Spanning the Visible to the Short-Wave Infrared

Characterization of Biological Absorption Spectra Spanning the Visible to the Short-Wave Infrared

Published on: January 10, 2025

Wavelength-tunable spasing in the visible.

Xiangeng Meng¹, Alexander V Kildishev, Koji Fujita

¹Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku 615-8510, Kyoto, Japan.

|August 7, 2013

Summary

Researchers achieved room-temperature surface plasmon amplification by stimulated emission of radiation (SPASER) in the visible range. This breakthrough overcomes dissipative losses using gold nanorods and laser dyes, enabling tunable nanoscale coherent optical fields.

More Related Videos

A Multimodal Wide-Field Fourier-Transform Raman Microscope

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Related Experiment Videos

Last Updated: May 9, 2026

Characterization of Biological Absorption Spectra Spanning the Visible to the Short-Wave Infrared

Characterization of Biological Absorption Spectra Spanning the Visible to the Short-Wave Infrared

Published on: January 10, 2025

A Multimodal Wide-Field Fourier-Transform Raman Microscope

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Area of Science:

Plasmonics and Nanophotonics
Materials Science
Quantum Optics

Background:

Surface plasmon amplification by stimulated emission of radiation (SPASER) is crucial for nanoscale coherent optical fields.
Realizing visible-range SPASERs is challenging due to significant dissipative losses in plasmonic systems.

Purpose of the Study:

To demonstrate room-temperature SPASER emission in the visible range.
To overcome dissipative losses in plasmon nanocavities.
To achieve tunable SPASER emission wavelengths.

Main Methods:

Utilized gold nanorods as plasmon nanocavities to support longitudinal surface plasmon modes.
Employed laser dyes to provide optical gain, compensating for plasmon losses.
Adjusted dye type and doping concentration to tune emission characteristics.

Main Results:

Achieved room-temperature SPASER emission by amplifying surface plasmon modes in gold nanorods.
Demonstrated tunable emission from 562 to 627 nm by selecting specific organic dyes and doping levels.
Narrowed the spectral line width of the SPASER emission to 5-11 nm.

Conclusions:

Successfully demonstrated a room-temperature visible-range SPASER by compensating plasmon losses with optical gain.
The developed method offers a versatile approach for achieving SPASERs across extended wavelength regimes.
This work paves the way for advanced nanoscale optical applications requiring coherent light sources.