University of Limerick
Browse
Silien_2017_doubling.pdf (4.45 MB)

Doubling the far-field resolution in midinfrared microscopy

Download (4.45 MB)
journal contribution
posted on 2017-11-22, 09:48 authored by Mahendar Kumbham, Susan Daly, Kevin O'Dwyer, RABAH MOURASRABAH MOURAS, NING LIUNING LIU, Aladin Mani, André Peremans, Syed A.M. Tofail, Christophe SilienChristophe Silien
The spatial resolution in far-field mid-infrared (λ>2.5 μm) microscopy and microspectroscopy remains limited with the full-width at half maximum of the point-spread function ca. λ/1.3; a value that is very poor in comparison to that commonly accessible with visible and near-infrared optics. Hereafter, it is demonstrated however that polymer beads that are centre-to-centre spaced by λ/2.6 can be resolved in the mid-infrared. The more than 2-fold improvement in resolution in the far-field is achieved by exploiting a newly constructed scanning microscope built around a mid-infrared optical parametric oscillator and a central solid-immersion lens, and by enforcing the linear polarization unidirectional resolution enhancement with a novel and robust specimen error minimization based on a particle swarm optimization. The method is demonstrated with specimens immersed in air and in water, and its robustness shown by the analysis of dense and complex self-assembled bead islands.

Funding

Using the Cloud to Streamline the Development of Mobile Phone Apps

Innovate UK

Find out more...

Study on Aerodynamic Characteristics Control of Slender Body Using Active Flow Control Technique

Japan Society for the Promotion of Science

Find out more...

History

Publication

Optics Express;24 (21), pp. 24377-24389

Publisher

Optical Society of America

Note

peer-reviewed

Other Funding information

ERC, SFI, IRC

Rights

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.24.024377. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Language

English

Usage metrics

    University of Limerick

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC