The Design And Regulation Of The High-performance Photonic Crystal Nanobeam Cavity

Due to the size of the photonic crystal nanobeam cavity is small, easy preparation, high quality factor and the smallest volume, it is widely used in light machine mechanics, low threshold laser and light of enhanced interaction. In order to meet the specific and the object under test in the determination of the specific conditions of the practical need of testing, this paper has designed two different configurations of high quality factor, low volume of photonic crystal nanobeam injection mold. To explore the different types of photonic crystal nanometer structural parameters of the beam cavity how and to what extent affecting the optical properties of photonic crystal nanobeam cavity. And on this basis, we have to optimize the structure of the photonic crystal nanobeam cavity, for practical preparation based on the different configurations of high sensitivity, high reliability of the photonic crystal nanobeam cavity optical sensors to provide theoretical basis and guiding principles.Photonic crystal nanobeam cavity we are introduced in this paper, the aperture cylindrical air holes on both sides of the cavity center or other structure is increased gradually from the center to both sides of the cavity, which is a photonic crystal nanobeam cavity ring tapered aperture, the other is a dual-polarized photonic crystal holey fishbone-like nanobeam cavities. on this basis, mainly focus on the following aspects: 1) the preliminary study found that, when the cylindrical air hole photonic crystal nanobeam cavity of the common type of radius of irregular change, quality factor and mode of photonic crystal nanobeam cavity product will change. Because in the photonic crystal nanobeam cavity preparation process, all air holes are in the same preparation conditions, so that all the holes with the same degree of deformation in its radius changes. To describe all of the air hole radius variation by defining parameters, optical properties change rule is studied to the parameters of air hole photonic crystal nanobeam cavity; 2) in ordinary cylindrical air holes photonic crystal nanobeam cavity in plus half circle rods diameter smaller than the diameter of the air holes the air, so as to form a ring. The optical properties by changing the air hole and medium column radius control photonic crystal nanobeam resonator.Through to adjust the structure and optimize the parameters of these two kinds of new structure of nanobeam resonator, we found two kinds of structure has its unique innovation. Fishbone type photonic crystal nanobeam cavity not only has the quality factor of Q super high and super low mode volume V in TE polarization mode, can also obtain the quality factor of Q super high and super low mode volume V in TM polarization mode. This is a breakthrough, so we called the dual polarized nanobeam resonator. Second kinds of structure starting from the two kinds of symmetry, through analysis and comparison, this two kinds of symmetry can also get the quality factor of Q super high and super low mode volume V. The two new types of photonic crystal nanobeam cavity as we expected. The property is very good.Photonic crystal is appeared in recent years a new kind of optical materials, due to its excellent properties, attracting widespread attention in recent years, in this paper, the concept of photonic crystal, origin, physical aspects such as theoretical basis, and calculation method are analyzed in detail. First proposed two kinds of new type of photonic crystal nanobeam cavity structure, has achieved preliminary results, lays a foundation for further exploration of nanobeam cavity.