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| Number | Title | Issue Date |
| 8358895 | Two-dimensional photonic crystal Holes 12 are created in a slab-shaped body 11. On the first surface 131 of the body 11, the holes 12 are arranged at the lattice points of a triangular lattice 141. On the second surface 132, they are arranged at the ... | 01/22/2013 |
| 8284814 | 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... | 10/09/2012 |
| 7936801 | 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... | 05/03/2011 |
| 7715668 | 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 h... | 05/11/2010 |
| 7656925 | Two-dimensional photonic crystal surface emitting laser The two-dimensional photonic crystal surface emitting laser according to the present invention includes a number of main modified refractive index areas periodically provided in a two-dimensional photonic crystal and secondary structures each relatively located in a... | 02/02/2010 |
| 7639720 | Two-dimensional photonic crystal surface emitting laser The two-dimensional photonic crystal surface emitting laser according to the present invention includes a semiconductor substrate, a main laser section and a reflection film. The main laser section includes a lower cladding layer, an active layer, a two-dimensional ... | 12/29/2009 |
| 7590325 | Two-dimensional photonic crystal optical multiplexer/demultiplexer The present invention provides an optical multiplexer/demultiplexer that can be smaller in size and higher in Q-factor or efficiency. This object is achieved by the following construction. In a slab-shaped body 11, low refractive index areas 12 having ... | 09/15/2009 |
| 7509014 | Two-dimensional photonic crystal having air-bridge structure and method for manufacturing such a crystal The present invention intends to provide a two-dimensional photonic crystal having a high level of mechanical strength and functioning as a high-efficiency resonator. The two-dimensional photonic crystal according to the present invention includes a slab layer 31... | 03/24/2009 |
| 7450810 | Two-dimensional photonic crystal cavity and channel add/drop filter In 2D photonic crystals, cavities having a heightened Q factor are made available, wherein combining the high Q cavities with waveguides affords channel add/drop filters having high resolution. In a cavity constituted by a point defect within a 2D photonic crystal, ... | 11/11/2008 |
| 7406221 | Two-dimensional photonic crystal multiplexer/demultiplexer An object of the present invention is to provide a multiplexer/demultiplexer capable of preventing a decrease in multiplexing/demultiplexing efficiency due to an error in wavelength or due to a crosstalk with other wavelengths. A two-dimensional photonic crystal hav... | 07/29/2008 |
| 7397994 | Two-dimensional photonic crystal slab having three-dimensional local structure The present invention aims to provide a two-dimensional photonic crystal having an optical resonator, which allows the control of the front/back emission ratio of light. To achieve this object, a refractive index member made of a material having a refractive index d... | 07/08/2008 |
| 7333703 | Two-dimensional photonic crystal having air-bridge structure and method for manufacturing such a crystal The present invention intends to provide a two-dimensional photonic crystal having a high level of mechanical strength and functioning as a high-efficiency resonator. The two-dimensional photonic crystal according to the present invention includes a slab layer 31... | 02/19/2008 |
| 7321707 | Electromagnetic wave frequency filter In this electromagnetic wave frequency filter, an electromagnetic wave of a predetermined frequency matching a resonant frequency of a resonator 41 is transmitted from an input waveguide 2 to an output waveguide 3 through the resonato... | 01/22/2008 |
| 7224862 | Two-dimensional photonic crystal optical multiplexer/demultiplexer using boundary reflection In an in-plane heterostructure photonic crystal in which vacancies 32 are periodically arranged in each of forbidden band zones 301, 302, with different cycle distances, a waveguide 33 is formed passing through all the forbidden band zones and p... | 05/29/2007 |
| 7184638 | Electromagnetic wave frequency filter The present invention aims to provide an electromagnetic wave frequency filter capable of transmitting an electromagnetic wave having a predetermined frequency between two waveguides with a high level of efficiency. This object is achieved by the following construct... | 02/27/2007 |
| 7120344 | Two-dimensional photonic crystal cavity and channel add/drop filter The Q factor and electric field pattern (radiation pattern) for a cavity made from a donor-type point defect 4 as is illustrated in FIG. 1 were simulated by the FDTD method. The simulation parameters were configured by selecting silicon for the slab | 10/10/2006 |
| 7046878 | Channel add/drop filter and channel monitor employing two-dimensional photonic crystal The channel add/drop filter includes first and second 2D photonic crystals, and the first 2D photonic crystal includes a first waveguide and a first cavity, with the first cavity acting to take in light of a specific wavelength from the first waveguide and radiate i... | 05/16/2006 |
| 6996319 | Two-dimensional photonic crystal optical resonator and optical reflector using interference between point defects The present invention provides a two-dimensional photonic crystal optical resonator and reflector having high light-extracting efficiency. A two-dimensional photonic crystal consisting of a slab-shaped body is created by periodically arranging holes having a refract... | 02/07/2006 |
