Raman-Mie scattering from single laser trapped microdroplets

Kiefer, W.; Popp, Jürgen; Lankers, M.; Trunk, M.; Hartmann, Ingo; Urlaub, E.; Musick, J.

doi:10.1016/s0022-2860(96)09655-x

Cited by 25 publications

(20 citation statements)

References 23 publications

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“…1,2 However, they have generally dealt with very high-pressure gas bubbles or even liquid inclusions, 3 mainly in the earth sciences, or glass 'artificial' bubbles, done especially for Raman scattering experiments. 4 In a similar area, i.e., inclusions in a fluid phase (liquid droplet in gas or gas bubble inside liquid), Kiefer and co-workers 5,6 performed chemical analysis by Raman scattering and geometric characterizations of inclusions through Lorenz-Mie theory.…”

Section: Introductionmentioning

confidence: 99%

Probing gas bubbles inside industrial glasses by Raman scattering

Pedeche¹,

Simon²,

Matzen³

et al. 2003

J Raman Spectroscopy

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The gas enclosed inside bubbles in industrial glasses was probed by micro-Raman spectrometry. The rotational and vibrational Raman spectra for various gases can be measured with high sensitivity. The elimination of a parasitic signal due to air that makes the signal acquisition difficult is discussed. In situ high-temperature Raman measurements were used to monitor the disproportionation reaction of SO 2 inside bubbles.

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Section: Introductionmentioning

confidence: 99%

Probing gas bubbles inside industrial glasses by Raman scattering

Pedeche¹,

Simon²,

Matzen³

et al. 2003

J Raman Spectroscopy

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“…[6] Raman spectroscopy is a well-established nondestructive method for studying the lattice vibrations in any material system where the Raman activity (number of Raman modes) can be determined by using group theory. [7] Despite its small interactive cross section (10 −30 to 10 −25 cm 2 /molecule), the Raman scattering signal is very sensitive to the changes in the crystal structure due to impurities, doping, phase transformations, etc. [8] Enhancement of the Raman scattered signal is possible in resonance Raman and surface-enhanced Raman scattering.…”

Section: Introductionmentioning

confidence: 99%

“…of microspheres as well as of the time dependence of chemical reactions. [7] Compared to other areas of material study, Raman spectroscopy has been scarcely utilized to study dielectric microspheres. The theory for Raman scattering and fluorescence by molecules embedded in small particles was proposed by Chew et al [10] Owen et al observed the WGMs for the first time in the Raman scattering from dielectric microparticles.…”

Section: Introductionmentioning

confidence: 99%

Whispering gallery modes and effect of coating on Raman spectra of single microspheres

Dantham

Bisht

Dobal

2011

J Raman Spectroscopy

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Raman spectra and fluorescence of BaTiO 3 and silica microspheres of different sizes have been studied. The observed whispering gallery modes (WGMs) have been assigned using theoretical simulations based on the Lorenz-Mie theory. The WGMs are found to have selective enhancements in the Raman spectra. The variations in the Raman spectra with the radial position of the excitation spot and excitation wavelength have been correlated with the morphology-dependent internal field distributions of the microspheres. The effect of a thin dye coating on the fluorescence and Raman spectra was studied, and a coating thickness of ∼200 nm was estimated from the theoretical simulation of experimentally observed data based on the Aden and Kerker theory.

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“…This development dates back to 1994, when Lankers et al 6 combined optical trapping with Raman and fluorescence spectroscopy to study single microparticles in water. Since then, several applications of the Raman tweezers have been reported [7][8][9][10][11][12] and recently the first single-cell study was presented. 13 Vibrational Raman spectroscopy, i.e., inelastic light scattered from vibrational modes, is an attractive optical technique because it provides direct access to the identity and relative concentration of molecules.…”

Section: Introductionmentioning

confidence: 99%

Resonance Raman spectroscopy of optically trapped functional erythrocytes

et al. 2004

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We introduce a novel setup combining a micro-Raman spectrometer with external optical tweezers, suitable for resonance Raman studies of single functional trapped cells. The system differs from earlier setups in that two separate laser beams used for trapping and Raman excitation are combined in a double-microscope configuration. This has the advantage that the wavelength and power of the trapping and probe beam can be adjusted individually to optimize the functionality of the setup and to enable the recording of resonance Raman profiles from a single trapped cell. Trapping is achieved by tightly focusing infrared (IR) diode laser radiation (830 nm) through an inverted oil-immersion objective, and resonance Raman scattering is excited by the lines of an argon:krypton ion laser. The functionality of the system is demonstrated by measurements of trapped single functional erythrocytes using different excitation lines (488.0, 514.5, and 568.2 nm) in resonance with the heme moiety and by studying spectral evolution during illumination. We found that great care has to be taken in order to avoid photodamage caused by the visible Raman excitation, whereas the IR trapping irradiation does not seem to harm the cells or alter the hemoglobin Raman spectra. Stronger photodamage is induced by Raman excitation using 488.0- and 514.5-nm irradiation, compared with excitation with the 568.2-nm line.

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Raman-Mie scattering from single laser trapped microdroplets

Cited by 25 publications

References 23 publications

Probing gas bubbles inside industrial glasses by Raman scattering

Probing gas bubbles inside industrial glasses by Raman scattering

Whispering gallery modes and effect of coating on Raman spectra of single microspheres

Resonance Raman spectroscopy of optically trapped functional erythrocytes

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