A framework for far-field infrared absorption microscopy beyond the diffraction limit

C. Silien, N. Liu, N. Hendaoui, S.A.M. Tofail, A. Peremans

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

A framework is proposed for infrared (IR) absorption microscopy in the far-field with a spatial resolution below the diffraction limit. The sub-diffraction resolution is achieved by pumping a transient contrast in the population of a selected vibrational mode with IR pulses that exhibit alternating central minima and maxima, and by probing the corresponding absorbance at the same wavelength with adequately delayed Gaussian pulses. Simulations have been carried out on the basis of empirical parameters emulating patterned thin films of octadecyltrichlorosilane and a resolution of 250 nm was found when probing the CH2 stretches at 3.5 μm with pump energies less than ten times the vibrational saturation threshold.
langue originaleAnglais
Pages (de - à)29694-29704
Nombre de pages11
journalOptics Express
Volume20
Numéro de publication28
Les DOIs
étatPublié - 31 déc. 2012

Empreinte digitale

infrared absorption
far fields
microscopy
pulses
diffraction
vibration mode
pumping
spatial resolution
pumps
saturation
thresholds
thin films
wavelengths
simulation
energy

Citer ceci

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A framework for far-field infrared absorption microscopy beyond the diffraction limit. / Silien, C.; Liu, N.; Hendaoui, N.; Tofail, S.A.M.; Peremans, A.

Dans: Optics Express, Vol 20, Numéro 28, 31.12.2012, p. 29694-29704.

Résultats de recherche: Contribution à un journal/une revueArticle

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AU - Peremans, A.

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Y1 - 2012/12/31

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