Results 31 to 40 of about 3,323 (241)

Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material

Nature Communications, 2019
Photonic crystals can steer, shape, and sculpture the flow of photons. Here, the author fabricate a deep-subwavelength photonic crystal slab that supports ultra-confined phonon polaritons, by patterning a nanoscale hole array in h-BN.
F. J. Alfaro-Mozaz, S. G. Rodrigo, P. Alonso-González, S. Vélez, I. Dolado, F. Casanova, L. E. Hueso, L. Martín-Moreno, R. Hillenbrand, A. Y. Nikitin   +9 more
doaj   +1 more source

Two-dimensionally confined topological edge states in photonic crystals

New Journal of Physics, 2016
We present an all-dielectric photonic crystal structure that supports two-dimensionally confined helical topological edge states. The topological properties of the system are controlled by the crystal parameters.
Sabyasachi Barik, Hirokazu Miyake, Wade DeGottardi, Edo Waks, Mohammad Hafezi   +4 more
doaj   +1 more source

High coupling efficiency to a low dispersion slow light-supporting photonic crystal waveguide [PDF]

Journal of the European Optical Society-Rapid Publications, 2013
In this paper, we design a waveguide on photonic crystal slab for propagation of low-dispersion slow light. By shifting the air holes adjacent to the waveguide, we obtain a photonic crystal waveguide with a group index of 25 in 25 nm bandwidth which ...
Moghaddam M. Khatibi, Attari A. R., Mirsalehi M. M.   +2 more
doaj   +1 more source

Band gap engineering in simultaneous phononic and photonic crystal slabs [PDF]

, 2010
We discuss the simultaneous existence of phononic and photonic band gaps in two types of phononic crystals slabs, namely periodic arrays of nanoholes in a Si membrane and of Si nanodots on a SiO2 membrane. In the former geometry, we investigate in detail
Pennec, Yan, ElHassouani, Y., Akjouj, A., Y. Hassouani, A. Akjouj, Bria, D., Vasseur, J., E. H. Boudouti, ElBoudouti, EH, Y. Pennec, Djafari Rouhani, Bahram, Li, Chanseng, J. O. Vasseur, C. Li, D. Bria, B. Djafari Rouhani   +15 more
core   +1 more source

Design and analysis of a 2D photonic crystal based parallelogram-shaped cavity with open corners for optical switching [PDF]

EPJ Web of Conferences
In this paper, we designed a 2×2 optical switch using a two- dimensional photonic crystal (2D PC) based on interference principle. For the first time, an air-hole slab-structure-based photonic switch is proposed.
Sreevani N.R.G., Annalakshmi T., Balaji V.R.   +2 more
doaj   +1 more source

Sensitivity enhancement in photonic crystal slab biosensors

Optics Express, 2010
Refractive index sensitivity of guided resonances in photonic crystal slabs is analyzed. We show that modal properties of guided resonances strongly affect spectral sensitivity and quality factors, resulting in substantial enhancement of refractive index sensitivity.
Mohamed, El Beheiry, Victor, Liu, Shanhui, Fan, Ofer, Levi   +3 more
openaire   +2 more sources

1D photonic crystal filled with low-temperature plasma for controlling broadband microwave transmission

AIP Advances, 2019
A 1D plasma photonic crystal (PPC) is filled with plasmas and slab dielectrics in a large volume cylindrical glow discharge device. The parameters of the PPC are designed to meet the transmission condition of broadband microwave (1.5GHz-12GHz) according ...
Jingfeng Yao, Chengxun Yuan, Hui Li, Jian Wu, Ying Wang, Anatoly A. Kudryavtsev, Vladimir I. Demidov, Zhongxiang Zhou   +7 more
doaj   +1 more source

Reconfigurable microfluidic photonic crystal slab cavities

Optics Express, 2008
We demonstrate the spectral and spatial reconfigurability of photonic crystal double-heterostructure cavities in silicon by microfluidic infiltration of selected air holes. The lengths of the microfluidic cavities are changed by adjusting the region of infiltrated holes in steps of several microns.
Cameron L, Smith, Uwe, Bog, Snjezana, Tomljenovic-Hanic, Michael W, Lee, Darran K C, Wu, Liam, O'Faolain, Christelle, Monat, Christian, Grillet, Thomas F, Krauss, Christian, Karnutsch, Ross C, McPhedran, Benjamin J, Eggleton   +11 more
openaire   +2 more sources

Thin-film photonic crystal LEDs with enhanced directionality

, 2010
The use of photonic crystals for light extraction from light-emitting diodes (LEDs) gives the possibility to shape the farfield emission pattern. This is of particular interest for étendue-limited LED applications that require a more directional ...
Bergenek, Krister
core   +1 more source

Theory of intrinsic propagation losses in topological edge states of planar photonic crystals

Physical Review Research, 2020
Using a semianalytic guided-mode expansion technique, we present theory and analysis of intrinsic propagation losses for topological photonic crystal slab waveguide structures with modified honeycomb lattices of circular or triangular holes.
Erik Sauer, Juan Pablo Vasco, Stephen Hughes   +2 more
doaj   +1 more source