Optical eigenmode imaging

Luca, Anna Chiara De; Kosmeier, Sebastian; Dholakia, Kishan; Mazilu, Michaël

doi:10.1103/physreva.84.021803

Cited by 37 publications

(39 citation statements)

References 12 publications

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“…Figure 1a describes our experimental set-up. Figure 1b shows the theoretical spatial field distribution of the first nine Optical Eigenmodes E ℓ in the region of interest (ROI) [7,30]. We observe that as the order of the mode ℓ increases finer details are accessed.…”

Section: Resultsmentioning

confidence: 99%

“…Optical eigenmodes implementation. Regarding the imaging modality, we expand the concept of optical eigenmode imaging [7] to Raman spectroscopical imaging. This technique is based on the single bucket detector measure of the optical scattering from the imaged sample under orthogonal eigenmode illumination.…”

Section: Funding Informationmentioning

confidence: 99%

“…In this paper, we used n = 4 measures for each projection coefficient accounting for the factor of four between the number illuminations and number of probes. Equation (2) highlights the major difference between OEi imaging in the incoherent Raman case and the coherent OEi imaging technique [7]. In the coherent case, we measure the projection coefficient in the Fourier plane of the sample, which transforms the reference beam into a single proportionality coefficient, irrespective of sample.…”

Section: Funding Informationmentioning

confidence: 99%

“…Previously, we have developed a coherent indirect imaging technique [7] based on OEi fields. This paper demonstrates the first experimental application of this approach to the case of imaging spontaneous Raman scattering.…”

Section: Introductionmentioning

confidence: 99%

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Nonredundant Raman imaging using optical eigenmodes

Kosmeier¹,

Zolotovskaya²,

Luca³

et al. 2014

Optica

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Various forms of imaging schemes have emerged over the last decade that are based on correlating variations in incident illuminating light fields to the outputs of single 'bucket' detectors. However, to date, the role of the orthogonality of the illumination fields has largely been overlooked and furthermore, the field has not progressed beyond bright field imaging. By exploiting the concept of orthogonal illuminating fields, we demonstrate the application of optical eigenmodes (OEi) to wide field, scan-free spontaneous Raman imaging, which is notoriously slow in wide-field mode. The OEi approach enables a form of indirect imaging that exploits both phase and amplitude in image reconstruction. The use of orthogonality enables us to non-redundantly illuminate the sample and, in particular, use a subset of illuminating modes to obtain the majority of information from the sample, thus minimising any photobleaching or damage of the sample. The crucial incorporation of phase, in addition to amplitude, in the imaging process significantly reduces background noise and results in an improved SNR for the image while reducing the number of illuminations. As an example we can reconstruct images of a surface-enhanced Raman spectroscopy (SERS) active sample with approximately an order of magnitude fewer acquisitions. This generic approach may readily be applied to other imaging modalities such as fluorescence microscopy or nonlinear vibrational microscopy.

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Section: Resultsmentioning

confidence: 99%

Section: Funding Informationmentioning

confidence: 99%

Section: Funding Informationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nonredundant Raman imaging using optical eigenmodes

Kosmeier¹,

Zolotovskaya²,

Luca³

et al. 2014

Optica

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“…The LG beams are created using a SLM that is wavefront corrected using the optical eigenmode (OEi) technique. 18,19 To illustrate our approach, we begin with a discussion of the far-field diffraction pattern of a general LG beam from an aperture composed of triple concentric triangular slits. This is an extension of the single triangular aperture already considered, which is presently one of the more powerful techniques for determining the azimuthal index 9,10 by simply counting the number of lobes in the far-field diffraction image.…”

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confidence: 99%

Simultaneous determination of the constituent azimuthal and radial mode indices for light fields possessing orbital angular momentum

Mazilu

Mourka

Vettenburg

et al. 2012

Applied Physics Letters

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A wide array of diffractive structures such as arrays of pinholes, triangular apertures, slits, and holograms have all recently been used to measure the azimuthal index of individual Laguerre-Gaussian beams. Here, we demonstrate a powerful approach to simultaneously measure both the radial and azimuthal indices of pure Laguerre-Gaussian light fields using the method of principal component analysis. We find that the shape of the diffracting element used to measure the mode indices is in fact of little importance and the crucial step is training any diffracting optical system and transforming the observed pattern into uncorrelated variables. The method is generic and may be extended to other families of light fields such as Bessel or Hermite-Gaussian beams.

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An Algebraic Approach to Light–Matter Interactions

Fernandez‐Corbaton

2024

Advanced Physics Research

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A theoretical and computational framework for the study and engineering of light–matter interactions is reviewed in here. The framework rests on the invariance properties of electromagnetism, and is formalized in a Hilbert space whose conformally invariant scalar product provides connections to physical quantities, such as the energy or momentum of a given field, or the outcome of measurements. The light–matter interaction is modeled by the polychromatic scattering operator, which establishes a natural connection to a popular computational formalism, the transition matrix, or T‐matrix. This review contains a succinct yet comprehensive description of the main theoretical ideas, and illustrates some of the practical benefits of the approach.

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Optical eigenmode imaging

Cited by 37 publications

References 12 publications

Nonredundant Raman imaging using optical eigenmodes

Nonredundant Raman imaging using optical eigenmodes

Simultaneous determination of the constituent azimuthal and radial mode indices for light fields possessing orbital angular momentum

An Algebraic Approach to Light–Matter Interactions

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