The bulk bands below the band gap take non-zero Z2 topological invariant characterized by the evolution of the Berry phase. As a consequence, the interface of two photonic crystals with opposite bi-anisotropy supports topological protected edge states that exhibit one-way propagation and are highly...
Possible realization of directional optical waveguides in photonic crystals with broken time-reversal symmetry. Phys. Rev. Lett. 100, 013904 (2008). Article ADS CAS PubMed Google Scholar Wang, Z., Chong, Y., Joannopoulos, J. D. & Soljačić, M. Observation of unidirectional backscattering...
PhotonicBandgapPropertiesofPhotonicCrystalswithaComplicatedPeri odicStructure FUL - 9 UYANGZ -b 9LI] -z ( L b 9 9 z U v 9 z 5180609 ) stract:W 9 9 - .W x v . x b x k 9 .M - b 9 b 9 b b b v .T k - b b v - .I z . Keywords: ; b ; ;M - - ...
By using nonlinear crystals and waveguides, soliton formation in discrete landscapes has been studied [30], [31]. Fig. 1 shows different examples of photonic simulators using coupled waveguides. Download: Download high-res image (233KB) Download: Download full-size image Fig. 1. (a) Photonic ...
Monodisperse Silica-Coated Polyvinylpyrrolidone NaYF4 Nanocrystals with Multicolor Upconversion 热度: NaYF4:Yb,Er/Tm上转换荧光纳米材料的合成、修饰及应用 热度: NaYF4 荧光 热度: 相关推荐 smaller(H=1.15)forthedenseAg/NaYF4:Yb3+rEr。 film.Thevaluesof”areallmuchsmallerthanthe requiredphotonnumbers...
As a result, tailoring light propagation with a photonic band gap mechanism has resulted in photonic crystal wave- guides and photonic crystal fibers2. Photonic crystals (PC) are periodically designed artificial structures that manipulate the flow of light, and their periodicity can be one, two, ...
Nodal line semimetals (NLS) are three-dimensional (3D) crystals that support band crossings in the form of one-dimensional rings in the Brillouin zone. In the presence of spin–orbit coupling or lowered crystal symmetry, NLS may transform into Dirac semi
A novel method for improving photocatalytic activity of TiO2 film- the combination of Ag deposition with application of external electric field 热度: 相关推荐 smaller(H=1.15)forthedenseAg/NaYF4:Yb3+rEr。 film.Thevaluesof”areallmuchsmallerthanthe requiredphotonnumbers(F/=2or3)topopulate thecorr...
Valley is an additional discrete synthetic degree of freedom in crystals with triangular and hexagonal point symmetries. Valley refers to one of the two high-symmetry points of the Brillouin zone, the K and K′ points and their immediate neighborhoods, and can be viewed as a pseudo-spin DOF....