Abstract:
A directional pixel for use in a display screen is disclosed. The directional pixel receives a planar Iightbeam and includes a light propagating layer and a grating to scatter a portion of the planar Iightbeam into a directional Iightbeam having a direction and angular spread controlled by the grating.
Abstract:
A system for passive optical alignment includes an through optical via (208) formed through a substrate (206), an optical transmission medium (216) secured to a first side of the substrate (206) such that the optical transmission medium (216) is aligned with the through optical via (208), and an optoelectronic component (212) secured to a second side of the substrate (206) such that the active region (210) of said optoelectronic component (212) is aligned with the through optical via (208).
Abstract:
A dynamic optical crossbar array (100) includes a first set of parallel transparent electrode lines (102), a bottom set of parallel electrode lines (104) that cross said transparent electrode lines (102), and an optically variable material (114) disposed between said first set of transparent electrode lines (102) and said bottom set of electrode lines (104).
Abstract:
Embodiments of the present invention are directed to systems for performing surface-enhanced Raman spectroscopy. In one embodiment, a system (100, 400, 600, 800, 900, 950) for performing Raman spectroscopy comprises a substrate (102) substantially transparent to a range of wavelengths of electromagnetic radiation and a plurality of nanowires (104, 602) disposed on a surface of the substrate. The nanowires are substantially transparent to the range of wavelengths of electromagnetic radiation. The system includes a material disposed on each of the nanowires. The electromagnetic radiation is transmitted within the substrate, into the nanowires, and emitted from the ends of the nanowires to produce enhanced Raman scattered light from molecules located on or in proximity to the material.
Abstract:
An angle sensor, system and method employ a guided-mode resonance. The angle sensor includes a guided-mode resonance (GMR) grating and a resonance processor. The resonance processor determines an angle of incidence of a signal incident on the GMR grating. The resonance processor uses a guided-mode resonance response of the GMR grating to the signal to determine the angle of incidence. The angle sensing system includes the GMR grating, the resonance processor and further includes an optical source that produces the signal. The method includes providing a GMR grating, detecting a guided-mode resonance produced in the GMR grating when subjected to an incident signal, and determining an angle of incidence of the incident signal from one or both of a number of and a spectral distance between guided-mode resonances present in a response of the GMR grating to the incident signal.
Abstract:
An optical coupling system includes an optical signal source to provide an optical signal from an aperture. The system also includes a substantially planar high-contrast grating (HCG) lens to convert an optical mode of the optical signal to provide a converted optical signal having a mode-isolating intensity profile. The system further includes an optical element to receive the converted optical signal. The optical signal source and the substantially planar HCG lens can be arranged to substantially mitigate coupling of a reflected optical signal associated with the converted optical signal that is reflected from the optical element to the aperture of the optical signal source based on a reflected mode-isolating intensity profile.
Abstract:
An apparatus (2) can comprise an optical slab (4) comprising a rigid substrate of substantially transmissive material. The apparatus (2) can also comprise a WDM multiplexer (6) to receive and combine a plurality of optical signals (14, 16 and 20) at different wavelengths to form a combined optical signal (24) in the optical slab (4) having an aggregate power. The apparatus can further comprise a broadcaster (28) to distribute the combined optical signal (24) from the optical slab (4) to each of a plurality of different optical receivers (30, 32 and 34) with a fraction of the aggregate power of the combined optical signal (24).
Abstract:
Techniques related to optical connectors are described herein. In some examples, an optical connector is illustrated including a ferrule and a mating arrangement to mechanically attach the ferrule to an optical device. The mating element defines an insertion direction. The ferrule includes an optical pathway for light transmission through the ferrule. An end longitudinal section of the optical pathway is to optically couple the optical pathway to the optical device. The end longitudinal section is angled with respect to the insertion direction.
Abstract:
Techniques related to optical connectors are described. A ferrule includes an optical pathway for light transmission through the ferrule. In examples, a sub-wavelength grating (SWG) assembly is integrated in the ferrule, aligned with an end of the optical pathway.
Abstract:
Planar, polarization insensitive, optical elements to control refraction of transmitted light in free space are disclosed. In one aspect, an optical element includes a substrate having a planar surface, and a polarization insensitive, high contrast, sub-wavelength grating composed of posts that extend from the planar surface. The grating has at least one region. Within each region, cross-sectional dimensions of the posts and/or lattice arrangement of the posts are nonperiodically varied to control refraction of light transmitted through the optical element.