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Related Concept Videos

UV–Vis Spectrometers01:14

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...
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IR Spectrometers

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...
Spectrophotometry: Introduction01:16

Spectrophotometry: Introduction

Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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Atomic Absorption Spectroscopy: Instrumentation

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Related Experiment Video

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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

Photonic crystal spectrometer.

Nadia K Pervez1, Warren Cheng, Zhang Jia

  • 1Columbia Laboratory for Unconventional Electronics, Department of Electrical Engineering, Columbia University, New York, 10027, USA. nadia.pervez@gmail.com

Optics Express
|July 1, 2010
PubMed
Summary
This summary is machine-generated.

We developed a novel photonic crystal spectrometer that uses patterned polymers on glass to map light intensities by wavelength. This new optical spectrometer offers a unique approach to spectral analysis.

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Area of Science:

  • Photonics
  • Optical Engineering
  • Materials Science

Background:

  • Traditional optical spectrometers can be bulky and complex.
  • Photonic crystals offer unique light manipulation properties.
  • Efficient outcoupling of waveguided light is crucial for integrated optics.

Purpose of the Study:

  • To demonstrate a new type of optical spectrometer utilizing photonic crystal patterns.
  • To develop a compact and potentially low-cost spectral analysis device.
  • To validate the performance of the photonic crystal spectrometer with a proof-of-concept demonstration.

Main Methods:

  • Nanofabrication of photonic crystal patterns in a polymer on a glass substrate.
  • Utilizing an array of these patterns to outcouple waveguided light.
  • Employing a camera to capture the spatially resolved intensity map of outcoupled light.
  • Converting the intensity map into a spectrum using photonic crystal response functions.

Main Results:

  • Successfully demonstrated a functional photonic crystal spectrometer.
  • Generated a spatially resolved map of light intensities corresponding to different wavelength bands.
  • Characterized a white light-emitting diode (LED) as a proof of concept.
  • Validated the conversion of intensity maps into spectra using pattern response functions.

Conclusions:

  • Photonic crystal patterns can be effectively used for outcoupling waveguided light for spectroscopy.
  • The developed spectrometer provides a novel method for spectral analysis.
  • This technology holds potential for compact and integrated optical sensing applications.