An organic light emitting display apparatus that has high (or improved) contrast and/or impact resistance. The organic light emitting display apparatus includes: a substrate; an organic light emitting device on the substrate to display an image; a sealing member on the organic light emitting device; a semitransparent film on a surface of the sealing member facing away from the organic light emitting device to transmit a portion of external light and to reflect another portion of the external light; a passivation film on the semitransparent film to protect the semitransparent film; and a transmissive black layer between the sealing member and the organic light emitting device to increase contrast, wherein the semitransparent film has a refractive index greater than that of the passivation film.

Organic light emitting display apparatus

The present disclosure relates to a semiconductor light emitting device, comprising: a plurality of semiconductor layers, including a first semiconductor layer having a first conductivity, a second semiconductor layer having a second conductivity different from the first conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer, generating light via electron-hole recombination; a first electrode, supplying either electrons or holes to the plurality of semiconductor layers; a second electrode, supplying, to the plurality of semiconductor layers, electrons if the holes are supplied by the first electrode, or holes if the electrons are supplied by the first electrode; a non-conductive distributed bragg reflector coupled to the plurality of semiconductor layers, reflecting the light from the active layer; and a first light-transmitting film coupled to the distributed bragg reflector from a side opposite to the plurality of semiconductor layers with respect to the non-conductive distributed bragg reflector, with the first light-transmitting film having a refractive index lower than an effective refractive index of the distributed bragg reflector.

Semiconductor Light Emitting Device

Recent progress in near-field optics instrumentation has led to a new class of subwavelength optical experiments in which near-field optical microscopes are used to image precisely the electromagnetic field distributions inside nanostructures microfabricated at the surface of dielectric wafers (microwaveguides, optical splitters, whispering-gallery modes, three-dimensional photonic crystals, metal nanoparticle gratings, plasmon waveguides, etc). In the light of these new advances, we review the physics of near-field optics in the presence of nanostructured materials (the so-called nano-optics). After the introductory part, revealing the main theoretical schemes and computation techniques well-suited for nano-optics, we will focus on several typical examples of calculations extracted from the recent literature. We will begin this series by revisiting the challenging problem of the optical addressing of both passive or active nanostructures in a subwavelength area. In this context, various procedures for the optimization of the energy transfer efficiency inside addressed nanostructures will be detailed. Finally, the concept of photonic local density of states in near-field optics will be revisited.

Near fields in nanostructures

Due to the limits of conventional perpendicular magnetic recording, it appears that alternative technologies are needed at areal densities >500 Gb/in2. Heat-assisted magnetic recording (HAMR) is a promising approach to extend areal densities to 1 Tb/in2 and beyond. All of the unique components necessary for a working HAMR system have been demonstrated. Although HAMR permits writing on high Hc media with lower magnetic fields and can produce higher write gradients than conventional magnetic recording, head/media spacing and the development of high Hc media with small grains remains challenging

Heat-Assisted Magnetic Recording

The aim of the present invention is to apply an intense magnetic field to a portion where an optical near-field is generated by a thermal assisted magnetic recording head with a scatterer having conductivity as an optical near-field generating element. To this end, a scatterer for generating an optical near-field is formed in a bottom portion of a slider, and a magnetic field is applied thereto using a coil. In order to increase the intensity of the magnetic field, a magnetic pole made of a soft magnetic material is formed over the scatterer.

Head for thermal assisted magnetic recording device, and thermal assisted magnetic recording device

In an EL element including a light emitting layer sandwiched between upper and lower electrodes, of light emitted therefrom, light totally reflected at a light emitting layer interface is not taken out, so there is a problem in that light emission efficiency reduces. Therefore, a light scattering layer in which metal particles are dispersed is provided between an electrode and the light emitting layer. According to such a structure, the light from the light emitting layer can be scattered by the metal particles and taken out, thereby improving the light emission efficiency. When plasmon is excited in the metal particles, light confined in the light emitting layer or each layer adjacent thereto can be used, thereby improving light use efficiency.

Electroluminescence element and display device using the same

A near-field optical head has a planar substrate having a first surface, a second surface disposed opposite to the first surface, and an inverted pyramidal hole extending through the first and second surfaces. The inverted pyramidal hole has at least one fine aperture formed at an apex thereof and disposed in the first surface and having at least one curved slant surface. An optical waveguide extends into the inverted pyramidal hole of the planar substrate for propagating light along an optical path. A mirror is disposed in the optical waveguide for bending in the direction of the fine aperture the optical path of the light propagated through the optical waveguide.

Near-field optical head having tapered hole for guiding light beam

A near-field optical head includes an optical waveguide (2501) formed from a clad (2502), a core (2503) and an optical element (2504), which co-operates with the clad to clamp the core. The clad (2502) has at least one inverted conical or pyramidal hole (2502a) formed through it, the apex of which is made as a very small aperture (2502b) for producing near-field light. A reflection film (2505) is provided on one end surface of the optical waveguide (2501). Also provided is a method for manufacturing such a near-field optical head.

Near-field optical head and method for manufacturing same

A metal film is included which is placed between a core and a cladding, propagates a laser beam along an interface between the core and the cladding, and generates a near-field light from the laser beam. The metal film has a base portion placed on one side surface of the core along a propagation direction of the laser beam facing from one end side toward the other end side, and an extending portion extended from the other end side of the base portion to the other end side in the propagation direction rather than the core. The other end side of the extending portion is exposed to the outside, and is formed with a top portion projected toward the core side when viewed from the propagation direction.

Near-field light generating element, near-field light head, and information recording and reproducing device

A near-field optical head (3000) which can be produced using a silicon process and can permit the irradiation and detection of light through a fine aperture while being positioned stably close to media, and which comprises a fine aperture (3008) formed at the apex of a taper, a light introduction unit (3002) for allowing light to propagate in approximately parallel to media, and a light reflection layer (3001) for reflecting the light propagated through the light introduction unit (3002) in the direction of the fine aperture (3008), the head is further provided with a condensing function capable of irradiating light condensed on the fine aperture (3008).

Manabu Oumi

Papers

Electroluminescence element and display device using the same

Near-field optical head having tapered hole for guiding light beam

Near-field optical head and method for manufacturing same

Near-field light generating element, near-field light head, and information recording and reproducing device

Near-field optical head and production method thereof