Patent application number | Description | Published |
20080226223 | METHOD OF MANUFACTURING A SEMICONDUCTOR DEVICE - A semiconductor device has a two-dimensional slab photonic crystal structure in which a substrate supports a sheet-like slab layer including, sequentially stacked, a lower cladding layer, an active layer, and an upper cladding layer. A periodic refractive index profile structure, in surfaces of the stacked layers, introduces a linear defect region that serves as a waveguide. A p-type region and an n-type region in the slab layer define a pn junction surface at a predetermined angle with respect to the surfaces of the stacked layers in the slab layer. | 09-18-2008 |
20090003397 | OPTICAL DEVICE, AND SEMICONDUCTOR LASER OSCILLATOR - In an optical device, a slab layer includes an active layer sandwiched between cladding layers. The slab layer has a periodic refractive index profile structure in a two-dimensional plane, as a two-dimensional slab photonic crystal structure, and a linear defect region serving as a waveguide in the periodic refractive index profile structure. Regions having different widths of the waveguides, as segments of the waveguide, are connected in series. | 01-01-2009 |
20090162008 | POLARIZATION-INDEPENDENT TWO-DIMENSIONAL PHOTONIC CRYSTAL MULTIPLEXER/DEMULTIPLEXER - The present invention is aimed at providing a two-dimensional photonic crystal wavelength multiplexer/demultiplexer capable of multiplexing and demultiplexing both TE and TM-polarized lights. In the wavelength multiplexer/demultiplexer, first and second resonators and having the same resonance wavelength λr are provided between first and second waveguides and which are separately provided in a two-dimensional photonic crystal having a photonic band gap for the TE polarization. A first polarization converter for converting a TM-polarized light to a TE-polarized light is provided on the first waveguide | 06-25-2009 |
20090175572 | Photonic crystal having heterostructure and optical device using the photonic crystal - The present invention has been made for providing a photonic crystal capable of multiplexing or demultiplexing light within a wavelength band having a certain width. It includes a slab-shaped body | 07-09-2009 |
20100104250 | TWO-DIMENSIONAL PHOTONIC CRYSTAL - A two-dimensional photonic crystal according to the present invention includes a first layer having a dielectric first layer slab in which first layer holes having a refractive index lower than that of the first layer slab are arranged cyclically, a second layer formed on the first layer, including dielectric columns having a refractive index higher than the air arranged in the air with the same cycle as the first layer hole, and a third layer having a dielectric third layer slab in which third layer holes having a refractive index lower than that of the third layer slab are arranged cyclically. Thus, it is possible to obtain the two-dimensional photonic crystal that can create a wider complete PBG than before regardless of the polarization of light and can be manufactured easily. | 04-29-2010 |
20120273911 | PHOTOELECTRIC TRANSDUCER - A photoelectric transducer ( | 11-01-2012 |
Patent application number | Description | Published |
20090074024 | Photonic crystal laser - A laser capable of emitting multiple laser beams is provided. A two-dimensional photonic crystal laser according to the present invention has a laminated structure including an active layer, a first photonic crystal layer having a periodic distribution of refractive index with a first period, and a second photonic crystal layer having a periodic distribution of refractive index with a second period that differs from the first period. This two-dimensional photonic crystal laser can emit a main beam traveling in a direction perpendicular to the two-dimensional photonic crystals and side beams each traveling in a direction inclined with respect to the main beam. These beams can be used, for example, in a recording/reproducing device by means of an optical disk, the main beam being used for recording/reproducing information and the side beams for following up the track. | 03-19-2009 |
20090135869 | Surface-emitting laser light source using two-dimensional photonic crystal - The present invention intends to provide a surface-emitting laser light source using a two-dimensional photonic crystal in which the efficiency of extracting light in a direction perpendicular to the surface is high. In a laser light source provided with a two-dimensional photonic crystal layer created from a plate-shaped matrix body in which a large number of holes are periodically arranged and an active layer arranged on one side of the two-dimensional photonic crystal layer, the holes are created to be columnar with a predetermined cross-sectional shape such as a circular shape, and the main axis of each of the columnar holes is tilted to a surface of the matrix body. When provided with this two-dimensional photonic crystal layer, the surface-emitting laser source using a two-dimensional photonic crystal has a Q | 05-28-2009 |
20090135871 | Two-Dimensional Photonic Crystal Surface Emitting Laser - An objective of the present invention is to provide a laser capable of producing a radially polarized laser beam with an annular cross section. A laser oscillator | 05-28-2009 |
20090175304 | Two-Dimensional Photonic Crystal Surface Emitting Laser Light Source - A two-dimensional photonic crystal surface emitting laser light source according to the present invention includes a two-dimensional photonic crystal made of a plate-shaped body material provided with a periodic arrangement of identically-shaped holes | 07-09-2009 |
20090263094 | Two-Dimensional Photonic Crystal | 10-22-2009 |
20090279579 | Two-dimensional photonic crystal surface-emitting laser light source - The present invention provides a two-dimensional photonic crystal surface-emitting laser light source capable of producing a beam that is not accompanied by unnecessary side lobes. A window-shaped electrode | 11-12-2009 |
20090285255 | Two-Dimensional Photonic Crystal Surface Emitting Laser Light Source - An objective of the present invention is to provide a surface emitting laser capable of selectively generating a laser oscillation in the fundamental mode and thereby emitting a single-wavelength laser light. In a surface emitting laser including an active layer and a two-dimensional photonic crystal provided on one side of the active layer, a reflector | 11-19-2009 |
20120002692 | Surface-emitting laser light source using two-dimensional photonic crystal - The present invention intends to provide a surface-emitting laser light source using a two-dimensional photonic crystal in which the efficiency of extracting light in a direction perpendicular to the surface is high. In a laser light source provided with a two-dimensional photonic crystal layer created from a plate-shaped matrix body in which a large number of holes are periodically arranged and an active layer arranged on one side of the two-dimensional photonic crystal layer, the holes are created to be columnar with a predetermined cross-sectional shape such as a circular shape, and the main axis of each of the columnar holes is tilted to a surface of the matrix body. When provided with this two-dimensional photonic crystal layer, the surface-emitting laser source using a two-dimensional photonic crystal has a Q | 01-05-2012 |
Patent application number | Description | Published |
20080252890 | Target Substance Sensor and Method Thereof Using a Photonic Crystal - A highly sensitive and compactible target substance sensor for detection of the target substance using a photonic crystal and a method thereof are provided. | 10-16-2008 |
20090016395 | TWO-DIMENSIONAL PHOTONIC CRYSTAL SURFACE-EMITTING LASER - Two-dimensional photonic crystal surface-emitting laser comprising a two-dimensional photonic crystal, having media different in refractive index arrayed in a two-dimensional cycle, disposed in the vicinity of an active layer that emits light by the injection of carriers, wherein the two-dimensional photonic crystal consists of square lattices having equal lattice constants in perpendicular directions, and a basic lattice consisting of a square with one medium as a vertex has an asymmetric refractive index distribution with respect to either one of the two diagonals of the basic lattice to thereby emit light in a constant polarizing direction. | 01-15-2009 |
20090034566 | Photonic crystal laser - One objective of the present invention is to provide a laser device which is capable of scanning beams of a laser light of high output power at a high speed without using mechanical scanning mechanisms. A plurality of the upper electrodes | 02-05-2009 |
20090232441 | Polarized Light Mode Converter - The present invention provides a polarized light mode converter which can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal. In a two-dimensional photonic crystal made of a slab-like main body provided with a plurality of different refractive index regions (for example, holes | 09-17-2009 |
20110151673 | PLASMA ETCHING METHOD, PLASMA ETCHING DEVICE, AND METHOD FOR PRODUCING PHOTONIC CRYSTAL - A plasma etching method capable of oblique etching with a high aspect ratio and high uniformity is provided. In the plasma etching method, a base body is etched with a high aspect ratio by the following process: An electric-field control device having an ion-introducing orifice penetrating therethrough in a direction inclined from the normal to the surface of a base body is placed on or above the surface of this base body. Plasma is generated on the surface of the base body on or above which the electric-field control is placed. A potential difference is formed between the plasma and the base body so as to attract ions in the plasma toward the base body. | 06-23-2011 |
20110188526 | TWO-DIMENSIONAL PHOTONIC CRYSTAL LASER - A two-dimensional photonic crystal laser light is provided. The two-dimensional photonic crystal laser includes a two-dimensional photonic crystal made of a plate-shaped member provided with a periodic arrangement of identically-shaped modified refractive index areas having a refractive index different from that of the plate-shaped member; and an active layer provided on one side of the two-dimensional photonic crystal. The modified refractive index areas are arranged at lattice points of a lattice with a same period at least in two directions; each modified refractive index area is shaped so that a feedback strength is different with respect to directions of two primitive lattice vectors of the lattice; the two-dimensional photonic crystal has a periodic structure of a supercell, which contains a plurality of lattice points; and the sum of the feedback strengths by all modified refractive index areas in the supercell is identical in each direction of the two primitive lattice vectors. | 08-04-2011 |
20120027038 | TWO-DIMENSIONAL PHOTONIC CRYSTAL LASER - A two-dimensional photonic crystal laser according to the present invention includes a two-dimensional photonic crystal layer | 02-02-2012 |
20120279553 | SOLAR CELL, SOLAR CELL PANEL, AND DEVICE COMPRISING SOLAR CELL - A solar cell ( | 11-08-2012 |
20130003768 | PHOTONIC CRYSTAL LASER - A photonic crystal laser capable of producing a radially-polarized halo-shaped laser beam having a smaller width than conventional beams includes: an active layer; a ring-shaped photonic crystal including a plate-shaped base body on one side of the active layer, the base body having a number of modified refractive index areas of the same shape, the modified refractive index areas having a refractive index different from the base body and periodically arranged in the circumferential direction of a ring, and each of the modified refractive index areas being asymmetrically shaped with respect to an axis extending through the center of the modified refractive index area in the radial direction of the ring; a first and second electrode facing each other across the active layer and the ring-shaped photonic crystal; and a window provided in the second electrode capable of allowing passage of a laser light generated from the ring-shaped photonic crystal. | 01-03-2013 |
20130039375 | PHOTONIC CRYSTAL SURFACE EMISSION LASER - A photonic crystal surface emission laser includes an active layer, and a photonic crystal layer made of a plate-shaped slab provided with modified refractive index area having a refractive index different from that of the slab, the modified refractive index areas being arranged on each of the lattice points of a first rhombic-like lattice and a second rhombic-like lattice in which both diagonals are mutually parallel and only one diagonal is of a different length, wherein a | 02-14-2013 |
20130105927 | PHOTOELECTRIC CONVERSION ELEMENT | 05-02-2013 |
20130121358 | SEMICONDUCTOR SURFACE LIGHT-EMITTING ELEMENT AND METHOD OF MANUFACTURING THEREOF - A semiconductor surface light-emitting element of this invention is provided with a photonic crystal layer | 05-16-2013 |
20130243026 | TWO-DIMENSIONAL PHOTONIC CRYSTAL SURFACE EMITTING LASER - Provided is a two-dimensional photonic crystal surface emitting laser having an active layer for generating light of a predetermined wavelength range by an injection of electric current and a two-dimensional photonic crystal layer provided on one side of the active layer, the layer having a plate-shaped base member in which modified refractive index areas whose refractive index differs from that of the base member are arranged. | 09-19-2013 |
20140036947 | EDGE-EMITTING SEMICONDUCTOR LASER ELEMENT - The present edge-emitting semiconductor layer element includes two-dimensional photonic crystals | 02-06-2014 |
20140247852 | END-FACE-EMITTING PHOTONIC CRYSTAL LASER ELEMENT - When an end-face-emitting photonic crystal laser element | 09-04-2014 |
20140348193 | SEMICONDUCTOR LASER ELEMENT AND LASER BEAM DEFLECTING DEVICE - According to a finite difference between inverse numbers of arrangement periods (a1 and a2) in first and second periodic structures, when seen in a thickness direction of a semiconductor laser element, at least two laser beams that form a predetermined angle (δθ) with respect to a lengthwise direction of a first driving electrode (E | 11-27-2014 |
20140355630 | RAMAN SCATTERING PHOTOENHANCEMENT DEVICE, METHOD FOR MANUFACTURING RAMAN SCATTERING PHOTOENHANCEMENT DEVICE, AND RAMAN LASER LIGHT SOURCE USING RAMAN SCATTERING PHOTOENHANCEMENT DEVICE - A Raman scattered light enhancement device including a waveguide provided in a photonic crystal ( | 12-04-2014 |
20150034901 | SEMICONDUCTOR LIGHT EMITTING ELEMENT - A semiconductor light emitting element includes an electrode | 02-05-2015 |