Full optical characterization of single nanoparticles using quantitative phase imaging

Khadir, Samira; Andrén, Daniel; Chaumet, Patrick C.; Monneret, Serge; Bonod, Nicolas; Käll, Mikael; Sentenac, Anne; Baffou, Guillaume

doi:10.1364/optica.381729

Cited by 45 publications

(49 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Supported by simulations, high-resolution imaging shows that absorption of light on an evolving surface relief drives the selection of the final periodicity, emphasizing the contributions of radiative and nonradiative scattered fields, as well as the dipole-dipole coupling between scattering centers. Alongside resolution, accessing full optical properties of nanostructures becomes of paramount importance and quantitative optical methods are emerging for the study of nano-objects [131].…”

Section: Observation and Control: Dynamic Coupling Between Light And mentioning

confidence: 99%

Advances in ultrafast laser structuring of materials at the nanoscale

2020

View full text Add to dashboard Cite

Laser processing implies the generation of a material function defined by the shape and the size of the induced structures, being a collective effect of topography, morphology, and structural arrangement. A fundamental dimensional limit in laser processing is set by optical diffraction. Many material functions are yet defined at the micron scale, and laser microprocessing has become a mainstream development trend. Consequently, laser microscale applications have evolved significantly and developed into an industrial grade technology. New opportunities will nevertheless emerge from accessing the nanoscale. Advances in ultrafast laser processing technologies can enable unprecedented resolutions and processed feature sizes, with the prospect to bypass optical and thermal limits. We will review here the mechanisms of laser processing on extreme scales and the optical and material concepts allowing us to confine the energy beyond the optical limits. We will discuss direct focusing approaches, where the use of nonlinear and near-field effects has demonstrated strong capabilities for light confinement. We will argue that the control of material hydrodynamic response is the key to achieve ultimate resolution in laser processing. A specific structuring process couples both optical and material effects, the process of self-organization. We will discuss the newest results in surface and volume self-organization, indicating the dynamic interplay between light and matter evolution. Micron-sized and nanosized features can be combined into novel architectures and arrangements. We equally underline a new dimensional domain in processing accessible now using laser radiation, the sub-100-nm feature size. Potential application fields will be indicated as the structuring sizes approach the effective mean free path of transport phenomena.

show abstract

Section: Observation and Control: Dynamic Coupling Between Light And mentioning

confidence: 99%

Advances in ultrafast laser structuring of materials at the nanoscale

2020

View full text Add to dashboard Cite

show abstract

“…It is important to note here for future applications that aim to measure at these short (microsecond) integration times, the photothermal heating of plasmonic nanoparticles under high illumination intensities should be considered. Fortunately, these plasmonic heating processes have been modeled for a variety of nanoparticle configurations, [ 116,117 ] and can now be quantified at the single‐particle level via, e.g., photothermal microscopy, [ 117,118 ] phase‐sensitive imaging, [ 117,119,120 ] or the anti‐Stokes emission. [ 121,122 ] Plasmonic assemblies are thus a promising platform to study fast, microsecond processes in real‐time.…”

Section: Applicationsmentioning

confidence: 99%

Plasmonic Assemblies for Real‐Time Single‐Molecule Biosensing

Armstrong

Horáček

Zijlstra

2020

Small

View full text Add to dashboard Cite

and bound states in the continuum, [27,28] and have been used in applications like biosensing [29] and color printing. [30] Plasmonic assemblies have proven particularly powerful in the field of biosensing. The presence of a biomarker results in, e.g., the (dis-)assembly of solution-phase plasmonic particles, or to changes in the particle-spacing in an assembly. Both result in strong changes in the far-field optical response of the plasmonic assemblies that is most often monitored using spectroscopy in a UV-vis spectrometer. In solution-based sensors, clustering of metal nanoparticles can be induced by target molecules, shifting the optical extinction spectrum of the nanoparticle solution (Figure 1d). [31] Such clustering assays based on particle (dis-) assembly have resulted in colorimetric assays for a range of analytes including proteins, DNA/RNA sequences, heavy ions, and toxic compounds. [31,32] Single-molecule biosensors, on the other hand, detect analytes by probing the optical response of a single nanoparticle. An important advantage of single-molecule sensing is the ability to construct histograms of sensor properties at the single-molecule level, e.g., the induced plasmon shift and statistical parameters like the waiting-time between events. Single-molecule biosensing using plasmonic sensors has been demonstrated in 2012 by Figure 1. Reported applications of nanoparticle assemblies. a) Left: Calculated SERS enhancement factors for a sphere dimer with a 2 nm gap spacing. Right: A Raman spectra of methylene blue dispersed on a monolayer (black) and bilayer (red) of gold nanoparticles. Adapted with permission. [11] Copyright 2019, American Chemical Society. (https://pubs.acs.org/doi/10.1021/acsnano.9b04224) Further permissions related to this material should be directed to the ACS. b) Non-linear emission spectrum of noncentrosymmetric patterned gold nanorods. The third-harmonic generation (THG) peak is in green and the second-harmonic generation (SHG) is in orange. Top inset-scheme of the assembly's THG (green) and SHG (orange) stemming from the red excitation wavelength (ω). Bottom inset-electron microscopy image of the nanoassembly (scale bar 200 nm). Adapted with permission. [16] Copyright 2019, American Chemical Society. c) Examples of metamaterials comprised of plasmonic assemblies (scale bars are 500 nm). Reproduced with permission. [25] Copyright 2014, Springer Nature. d) Left: A cluster assay biosensor in which nanoparticle assembly is induced by a target molecule. Right: An example UV-vis spectrum of the gold nanoparticle monomers (red) and subsequent assemblies upon addition of target molecules (blue).

show abstract

“…The setup for phase imaging is shown in Figure 3B. It utilizes a quantitative phase microscopy technique based on QLSI [42][43][44][45]. A light-emitting diode with a wavelength centered at 617 nm integrated in a Köhler configuration is used as an illumination source with a controlled optical plane wave (controlled illuminated area and controlled numerical aperture).…”

Section: Measurement Setupmentioning

confidence: 99%

“…The information is encoded in the phase of the transmitted light without any modulation of its intensity, making the information inaccessible with a conventional microscope. In order to resolve the encoded information, one has to obtain the phase map information, which we measured in this article using quadriwave lateral shearing interferometry (QLSI) technique [43][44][45][46] (see more details in Section 5). The phase-addressing capability of metasurfaces, i.e., the spatial phase distribution of the phase elements, can be scaled down to the single pixel with a pitch of 300 nm, which is beyond Abbe's classical diffraction limit with an incident wavelength higher than 600 nm.…”

Section: Introductionmentioning

confidence: 99%

Printing polarization and phase at the optical diffraction limit: near- and far-field optical encryption

et al. 2020

Self Cite

View full text Add to dashboard Cite

Securing optical information to avoid counterfeiting and manipulation by unauthorized persons and agencies requires innovation and enhancement of security beyond basic intensity encryption. In this paper, we present a new method for polarization-dependent optical encryption that relies on extremely high-resolution near-field phase encoding at metasurfaces, down to the diffraction limit. Unlike previous intensity or color printing methods, which are detectable by the human eye, analog phase decoding requires specific decryption setup to achieve a higher security level. In this work, quadriwave lateral shearing interferometry is used as a phase decryption method, decrypting binary quick response (QR) phase codes and thus forming phase-contrast images, with phase values as low as 15°. Combining near-field phase imaging and far-field holographic imaging under orthogonal polarization illumination, we enhanced the security level for potential applications in the area of biometric recognition, secure ID cards, secure optical data storage, steganography, and communications.

show abstract

Full optical characterization of single nanoparticles using quantitative phase imaging

Cited by 45 publications

References 43 publications

Advances in ultrafast laser structuring of materials at the nanoscale

Advances in ultrafast laser structuring of materials at the nanoscale

Plasmonic Assemblies for Real‐Time Single‐Molecule Biosensing

Printing polarization and phase at the optical diffraction limit: near- and far-field optical encryption

Contact Info

Product

Resources

About