Simultaneous recording of the spectral, temporal, and polarization properties of emission spectra

Lisa A. Kelly, John G. Trunk, John C. Sutherland

Research output: Contribution to journalConference article

Abstract

We describe a system that records simultaneously the temporal profile of both linear polarization components of all wavelengths in an emission spectrum. Our excitation source is the vacuum ultraviolet storage ring of the National Synchrotron Light Source at Brookhaven National Laboratory, which provides a continuous spectrum of ultraviolet, visible and near-infrared light consisting of approximately equals 1 ns FWHM pulses at a repetition rage of approximately equals 50 MHz, and with identical temporal profiles at all wavelengths, although any source with similar temporal properties could be used. A single excitation band is selected by a monochromator and linearly polarized before reaching the sample. Fluorescence can be monitored either along an axis perpendicular to the excitation beam, or at near normal incidence. A polarizer divides the fluorescence into components with polarizations parallel and perpendicular to the polarization of the incident beam. The emission spectrum is dispersed by an imaging spectrograph, and detected with a resistive-anode imaging photomultiplier operated in a single photon counting mode. The time of arrival of a photon is derived from signals originating in the micro-channel plates that function as the 'dynodes' of the photomultiplier, while the location of the centroid of the electron cascade on the anode of the detector indicates both the wavelength and polarization of the detected photon. Simultaneous acquisition of the time-resolved emission spectra for both polarization components is more efficient than conventional approaches and reduces the complications in data analysis that can arise when the properties of a sample change during the time when sequential data-sets are collected.

Original languageEnglish (US)
Pages (from-to)2-11
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume2980
DOIs
StatePublished - Dec 1 1997
Externally publishedYes
EventAdvances in Fluorescence Sensing Technology III - San Jose, CA, United States
Duration: Feb 9 1997Feb 9 1997

Fingerprint

emission spectra
Polarization
recording
polarization
Approximately equal
Photons
Excitation
Photomultipliers
Wavelength
photons
anodes
Ultraviolet
Fluorescence
Perpendicular
wavelengths
dynodes
excitation
Anodes
Photon
fluorescence

Keywords

  • Emission spectra
  • Fluorescence anisotrophy
  • Fluorescence lifetimes
  • Fluorescence polarization
  • Synchrotron radiation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Simultaneous recording of the spectral, temporal, and polarization properties of emission spectra. / Kelly, Lisa A.; Trunk, John G.; Sutherland, John C.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 2980, 01.12.1997, p. 2-11.

Research output: Contribution to journalConference article

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N2 - We describe a system that records simultaneously the temporal profile of both linear polarization components of all wavelengths in an emission spectrum. Our excitation source is the vacuum ultraviolet storage ring of the National Synchrotron Light Source at Brookhaven National Laboratory, which provides a continuous spectrum of ultraviolet, visible and near-infrared light consisting of approximately equals 1 ns FWHM pulses at a repetition rage of approximately equals 50 MHz, and with identical temporal profiles at all wavelengths, although any source with similar temporal properties could be used. A single excitation band is selected by a monochromator and linearly polarized before reaching the sample. Fluorescence can be monitored either along an axis perpendicular to the excitation beam, or at near normal incidence. A polarizer divides the fluorescence into components with polarizations parallel and perpendicular to the polarization of the incident beam. The emission spectrum is dispersed by an imaging spectrograph, and detected with a resistive-anode imaging photomultiplier operated in a single photon counting mode. The time of arrival of a photon is derived from signals originating in the micro-channel plates that function as the 'dynodes' of the photomultiplier, while the location of the centroid of the electron cascade on the anode of the detector indicates both the wavelength and polarization of the detected photon. Simultaneous acquisition of the time-resolved emission spectra for both polarization components is more efficient than conventional approaches and reduces the complications in data analysis that can arise when the properties of a sample change during the time when sequential data-sets are collected.

AB - We describe a system that records simultaneously the temporal profile of both linear polarization components of all wavelengths in an emission spectrum. Our excitation source is the vacuum ultraviolet storage ring of the National Synchrotron Light Source at Brookhaven National Laboratory, which provides a continuous spectrum of ultraviolet, visible and near-infrared light consisting of approximately equals 1 ns FWHM pulses at a repetition rage of approximately equals 50 MHz, and with identical temporal profiles at all wavelengths, although any source with similar temporal properties could be used. A single excitation band is selected by a monochromator and linearly polarized before reaching the sample. Fluorescence can be monitored either along an axis perpendicular to the excitation beam, or at near normal incidence. A polarizer divides the fluorescence into components with polarizations parallel and perpendicular to the polarization of the incident beam. The emission spectrum is dispersed by an imaging spectrograph, and detected with a resistive-anode imaging photomultiplier operated in a single photon counting mode. The time of arrival of a photon is derived from signals originating in the micro-channel plates that function as the 'dynodes' of the photomultiplier, while the location of the centroid of the electron cascade on the anode of the detector indicates both the wavelength and polarization of the detected photon. Simultaneous acquisition of the time-resolved emission spectra for both polarization components is more efficient than conventional approaches and reduces the complications in data analysis that can arise when the properties of a sample change during the time when sequential data-sets are collected.

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