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Different types of plasmonic waveguides have been recently proposed such as metal nanoparticle chains, metal films, metal/insulator/ metal (MIM) slabs, metal strips, etc. We have shown recently that the nonlinear optical phenomena are strongly pronounced at the interface of a metal and a smectic A liquid crystal (SALC) due to the nonlinear surface plasmon polariton (SPP) mixing in SALC with a large...
In this paper we report about the possibility to control a strong signal beam with a much weaker control beam, resorting to the linear optical phenomena known as coherent perfect absorption and transparency (CPA and CPT). First, analytical formulas for CPA and CPT in a realistic yet prototypical configuration of a substrate-backed optically conducting surface (graphene, metallic metasurface…) are...
The objective of our work is connected with label free investigations at nanoscale by using a new multimodal microscopy system by using near field label free techniques. The system includes the techniques with hundred nanometers resolution and with few nanometers resolution, being able to image simultaneously the same sample area giving complementary information. Our system includes also an atomic...
The scattering matrix is a fundamental tool to quantitatively describe the properties of resonant systems. In particular, it enables the understanding of many photonic devices of current interest, such as photonic metasurfaces and nanostructured optical scatterers. In this contribution, we show that the scattering matrix of a photonic system is completely determined by its quasinormal modes, i.e.,...
Pulling optical force discovered recently in the theory and experiment has drawn great attention owing to its counterintuitive nature and promising applications. Pulling force originates from the enhanced forward light scattering that in accordance with the momentum conservation conveys light momentum to particles in the backward direction. The amplified forward scattering is achieved through the...
Trapping and manipulation of matter at micrometer scaled up to a single nanoparticle has assumed a fundamental role for several applications and, particularly, in biomedical environments. Furthermore, trapping of living matter at the nanoscale, such as proteins and DNA sections, allows the study of many diseases and also the investigation of the effects of new drugs on a single pathogen like a virus.
Since the advent of transformation optics a decade ago [1], the ability to achieve optical cloaking has become a matter of practical realization. However, so far extreme material requirements and large device areas have significantly posed an obstacle to realize compact cloaking schemes that are fully functional. Here, by taking a different approach and by following our recently developed general...
A new type of layered photonic structure, whose alternating layers are filled with randomly dispersed nano-spheres, is fabricated and its optical properties are experimentally and theoretically analysed. Structures are made on a pullulan doped with chromium ions (dichromated pullulan - DCP) using holography. We found that experimental structures are similar to those observed on wings of the Diachrysia...
Topological photonic structures in analogy to their electronic counterparts can provide new functionalities in nanophotonics. In particular, they can possess topologically protected photonic modes that can propagate unidirectionally without scattering and can have an extreme photonic density of states (PDOS). These unique properties can directly impact many photonic systems in optical communications...
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