Nanoscale distance fluctuations probed by photothermal correlation spectroscopy

Wähnert, Miriam; Radünz, Romy; Cichos, Frank

doi:10.1117/12.817847

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…The change of the refractive index can be well detected by optical means such as differential interference contrast or the so-called photothermal heterodyne detection, , which has pushed sensitivity up to the level of single molecules. , The latter technique has been successfully applied to study the absorption spectra of single gold-nanoparticles, semiconductor nanoparticles, or carbon nanotubes. New techniques such as photothermal correlation spectroscopy complementing fluorescence correlation techniques or distance measurements by coupling two metal particles have been realized or put forward. − These recent developments highlight the perspective of photothermal microscopy to experience a similar success as single molecule fluorescence detection. However, most of the applications and their further development are considerably limited by the fact that neither a sound understanding of the photothermal signal generation process for single nanoscale absorbers nor a true description of the photothermal detection volume exists.…”

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confidence: 99%

Photothermal Single-Particle Microscopy: Detection of a Nanolens

2012

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Combining quantitative photothermal microscopy and light scattering microscopy as well as accurate MIE scattering calculations on single gold nanoparticles, we reveal that the mechanism of photothermal single-molecule/particle detection is quantitatively explained by a nanolensing effect. The lensing action is the result of the long-range character of the refractive index profile. It splits the focal detection volume into two regions. Our results lay the foundation for future developments and quantitative applications of single-molecule absorption microscopy.

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confidence: 99%

Photothermal Single-Particle Microscopy: Detection of a Nanolens

2012

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“…[160]. [4,5,15,18,26,40,48,49,61,72,74,79,[86][87][88][92][93][94]100,154,155,164,169,183,184,197,198,199,211,228,233].…”

Section: T-matrix Calculations For Particles With One or Several (Eccentric) Inclusionsmentioning

confidence: 99%

Comprehensive T-matrix reference database: A 2012–2013 update

Mishchenko¹,

Videen²,

Khlebtsov³

et al. 2013

Journal of Quantitative Spectroscopy and Radiative Transfer

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a b s t r a c tThe T-matrix method is among the most versatile, efficient, and widely used theoretical techniques for the numerically exact computation of electromagnetic scattering by homogeneous and composite particles, clusters of particles, discrete random media, and particles in the vicinity of an interface separating two half-spaces with different refractive indices. This paper presents an update to the comprehensive database of Tmatrix publications compiled by us previously and includes the publications that appeared since 2007. It also lists several earlier publications not included in the original database.Published by Elsevier Ltd.

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“…T-matrix calculations of optical resonances in nonspherical particles and particle clusters [4,5,15,18,26,40,48,49,61,72,74,79,[86][87][88][92][93][94]100,154,155,164,169,183,184,197,198,199,211,228,233]. [12,24,25,42,95,113,138,139,189,190,191].…”

Section: T-matrix Calculations For Particles With One or Several (Eccmentioning

confidence: 99%