Results 71 to 80 of about 5,256,570 (379)
Two-dimensional heterogeneous photonic bandedge laser
, 2004 We proposed and realized a two-dimensional (2D) photonic bandedge laser surrounded by the photonic bandgap. The heterogeneous photonic crystal structure consists of two triangular lattices of the same lattice constant with different air hole radii.
Kim, Se-Heon +4 more
core +1 more source
FEM modeling of 3D photonic crystals and photonic crystal waveguides [PDF]
SPIE Proceedings, 2005 We present a finite-element simulation tool for calculating light fields in 3D nano-optical devices. This allows to solve challenging problems on a standard personal computer. We present solutions to eigenvalue problems, like Bloch-type eigenvalues in photonic crystals and photonic crystal waveguides, and to scattering problems, like the transmission ...
Sven Burger +4 more
openaire +3 more sources
Advanced Functional Materials, EarlyView.PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu +14 more
wiley +1 more source
Optical Kossel Lines and Fluorescence in Photonic Liquid Crystals
Crystals, 2020 We propose a general analytical way to describe the fluorescence peculiarities in photonic liquid crystals (revealing themselves as an optical analog of the X-ray Kossel lines in conventional crystals) based at the localized optical edge modes existing ...
Vladimir A. Belyakov
doaj +1 more source
Dual index properties of photonic crystal and its application in subwavelength focusing
Materials Research Express, 2021 Based on the two-dimensional dielectric wedge-shaped photonic crystal, we studied the existence of two kinds of equivalent refractive indexes (negative refractive index is −1, positive refractive index is 1.897) in the photonic crystal by means of fast ...
Bingming Liang +4 more
doaj +1 more source
Photonic crystal slab Laplace operator for image differentiation
, 2018 Spatial differentiation is important in image-processing applications such as image sharpening and edge-based segmentation. In these applications, of particular importance is the Laplacian, the simplest isotropic derivative operator in two dimensions ...
Cheng Guo +4 more
semanticscholar +1 more source
Scheme for Achieving a Topological Photonic Crystal by Using Dielectric Material.
Physical Review Letters, 2015 We derive in the present work topological photonic states purely based on conventional dielectric material by deforming a honeycomb lattice of cylinders into a triangular lattice of cylinder hexagons.
Longhua Wu, X. Hu
semanticscholar +1 more source
Photonic crystals with controlled disorder [PDF]
Physical Review A, 2011 Photonic crystals are extremely sensitive to structural disorder even to the point of completely losing their functionalities. While on one side this can be detrimental for applications in traditional optical devices, on the other side, it gives also rise to very interesting new physics and maybe even new applications.
Riccardo Sapienza +6 more
openaire +8 more sources
3D Printed Ultra‐Fast Plastic Scintillators Based on Perovskite‐Photocurable Polymer Composite
Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.The demand for radiation detection is increasing in a number of fields, including high‐energy physics, medical imaging, and homeland security. This study serves to demonstrate the potential for the fabrication of fast perovskite‐based scintillators with complex shapes via stereolithographic additive manufacturing, representing a new path toward the ...
Antonella Giuri +16 more
wiley +1 more source
Optics Express, 2005 A new type of two-dimensional photonic-crystal (PC) structure called annular PC composed of a dielectric-rod and a circular-air-hole array in a square or triangular lattice such that a dielectric rod is centered within each air hole is studied. The dielectric rods within the air holes greatly modify the dispersion diagram of the photonic crystal ...
Hamza Kurt, David S. Citrin
openaire +3 more sources