Since the first report on the far-field optical detection of single metal nanoparticles in the late
1990s, the field has rapidly developed and new methods and concepts have been …

The photothermal (PT) signal arises from slight changes of the index of refraction in a
sample due to absorption of a heating light beam. Refractive index changes are measured …

Microscopy is one of the main research and application areas of digital holography. Direct
access to the phase as well as amplitude profiles makes quantitative phase microscopy by …

Photothermal processes in plasmonic nanoparticles have been at the basis of a decade of
burgeoning activities that set the field of thermoplasmonics. Here, we present an overview of …

We show how to push the detection limits in photothermal microscopy towards weaker
single absorbers, by a systematic optimization of signal and noise sources. In particular, we …

Electrochemical (EC) impacts of single nanoparticles (NPs) on an ultramicroelectrode are
coupled with optics to identify chemical processes at the level of individual NPs. While the …

Recent advances in optical microscopy instrumentation and processing techniques have led
to imaging that both breaks the diffraction barrier and enables sub-pixel resolution. This …

The first key step in the detection and classification of most cancers is the microscopic
assessment of thin tissue slices, the so-called “histopathology”. This procedure is still …

Quantitative phase imaging enables precise and label-free characterizations of individual
nano-objects within a large volume, without a priori knowledge of the sample or imaging …

The main issues and areas of application of photothermal and optoacoustic spectroscopy
are reviewed. Progress in innovative techniques in the most actively develo** areas is …