Abstract:
A system for optical spectroscopy through a probe (10) implanted in a tissue, the system including a light collecting probe (10) comprising a waveguide formed by a single optical fiber (11) and having a proximal end (11a) and a distal end (11b), the proximal end (11a) being formed with a taper (12) along which at least one optical window (11c) is positioned, wherein light entering at an axial section of the taper (12) generates a specific subset of guided modes defined by the diameter (a 1 , a 2 ,..., a n ) of the optical fiber at that axial section, the guided modes propagating toward the distal end (11b) of the waveguide and generating an output (OUT) at the distal end of the waveguide; a demultiplexer (20) configured to receive outputs (OUT) provided by the probe (10) and discriminate the outputs (OUT) based on their modal content of origin; and a detector (30) configured to detect the discriminated outputs.
Abstract:
A magnetic actuator (1) comprising a substrate (3), a membrane layer (5) directly or indirectly applied on a surface (3 a) of the substrate (5), in which the membrane layer consists of a matrix of elastic polymer material, in which nanoparticles of magnetic material, capable of undergoing a dynamic effect under the action of a magnetic field, are dispersed, and at least one magnetic field generator (11) suitable to generate a magnetic field acting on the membrane layer (5), in which the magnetic field generator (11) is directly or indirectly arranged on the surface of the substrate, or within the substrate.
Abstract:
A device for harvesting energy from a fluidic flow, including a flexible structure (4, 6, 8, 10, 12, 66, 70) formed by: a base layer (12); a conductive layer (8), made of a conductive material and laid on the base layer (12); and a piezoelectric layer (6), made of a piezoelectric material and laid on the conductive layer (8). The base layer (12), the conductive layer (8), and the piezoelectric layer (6) form a crystalline structure (50) including a plurality of pseudomorphic portions (52).
Abstract:
Electroactive microelectromechanical device of the Artificial Hair Cell type, comprising a moving cilium structure including a substrate (11, 12; 42) and a cantilever (18; 48), partly or entirely in.piezoelectric material, subject to bending or deformation following the action of a force and/or an applied voltage (V app1 ), said cantilever (18; 48) comprising a multilayer (13, 14a, 14b, 16) inducing a stress-driven geometry in which a portion (19) of said cantilever (18; 48) lies outside of a plane defined by the substrate (11, 12; 42). According to the invention said cantilever (18; 48) is associated to a piezoresistive element, in particular of piezoresistive material (15) configured to measure the bending or deformation of said cantilever (18; 48).
Abstract:
The disclosed flexible sensor comprises a flexible substrate (10) of polymeric material, a bottom electrode (30) configured as a reference electrode (120), an active layer (40) of piezoelectric material, a top electrode (50) connected to a signal conductor (110), a flexible coating layer (60) of polymeric material which cooperates with the substrate to encapsulate the electrodes and active layer, and an additional layer (70) of metal on the coating layer and short-circuited to the bottom electrode, the additional layer and the bottom electrode acting as an electromagnetic shield.
Abstract:
A multi-point light-delivering device, comprising a waveguide (1) carrying light along a longitudinal axis and including multiple optical windows (10), through which the carried light is out-coupled from the waveguide. The waveguide comprises a tapered region (5) along which the optical windows are distributed, wherein each optical window out-couples a specific subset of propagating modes of the carried light, to which the optical window is matched.
Abstract:
Method for manufacturing a multifunctional electromagnetic waveguide (10), comprising: mounting an optical fiber (1) on a roto-translational handling apparatus (RT), forming a first mask (41) on a tapered section of the fiber in order to define the shape of an optical window (12), forming a first metal layer (42) around the tapered section (13), leaving a lateral edge of the first mask (41) uncovered, removing the first mask (41) by chemical etching in order to uncover the optical window (12), depositing a first transparent layer (43) around the tapered section (13), depositing a second metal layer (44) around the insulating layer (43), forming a second mask (51) which defines the shape of a conductive track (11; 11a, lib, 11c), removing the second metal layer (44) by chemical etching, and removing the second mask (51) by chemical etching in order to uncover the conductive track.