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Observation of morphology-dependent input and output resonances in time-dependent Raman spectra of optically levitated microdroplets

โœ Scribed by K. Schaschek; J. Popp; W. Kiefer

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
679 KB
Volume
24
Category
Article
ISSN
0377-0486

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โœฆ Synopsis

Abstract

Using a highly efficient Raman setโ€up, which allows a Raman spectrum to be recorded in less than 1 s, morphologyโ€dependent resonances in optically levitated microdroplets of waterโ€“glycerol mixtures were studied. In addition to the output resonances, where the Raman frequency coincides with an electromagnetic sphere resonance, input resonances could also be demonstrated. The latter are observed when the evaporating droplet reaches a radius which, together with the wavelength of the incident laser lgith, fulfils the resonance condition for the cavity modes of a sphere. Preliminary results for droplet size change during evaporation of a particular droplet in the micrometre range are presented.

๐Ÿ“œ SIMILAR VOLUMES

Observability of morphology-dependent ou
Observability of morphology-dependent output resonances in the Raman spectra of optically levitated microdroplets
โœ J. Popp; M. Trunk; M. Lankers; I. Hartmann; K. Schaschek; W. Kiefer ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 975 KB

Theory and measurements are presented to explain the observability of morphology-dependent resonances in Raman spectra. An algorithm for รtting MDRs in Raman spectra has also been developed. Results are given of investigations on several microdroplets which were obtained from three di โ€ erent spectra

Simulation of morphology-dependent reson
Simulation of morphology-dependent resonances in the Raman spectra of optically levitated microspheres
โœ I. Hartmann; M. Lankers; J. Popp; M. Trunk; E. Urlaub; W. Kiefer ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 264 KB ๐Ÿ‘ 3 views

Theoretical and numerical simulations of inelastic light scattering by dielectric microspheres (sizes about 5-15 lm) irradiated with laser light of angular frequency are presented. Applying a superposition of induced dipoles inside x 0 the particle volume, the so-called morphology-dependent resonanc