Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Majd Zoorob"'
Publikováno v:
Nanotechnology. 16:2703-2706
A novel method for designing photonic crystals with high orders of rotational symmetry using an inverse Fourier transform (IFT) method is presented. The IFT of an n-sided polygon is taken and the positions of the peaks are computed in order to obtain
Autor:
A.D. Harris, G.J. Parker, D. M. Whittaker, Jeremy J. Baumberg, Majd Zoorob, Maria Caterina Netti, M. B. D. Charlton
Publikováno v:
Physical Review Letters. 86:1526-1529
We demonstrate that 2D photonic crystals can possess optical trirefringence in which there are six field orientations for which linear incident light is not perturbed on reflection or transmission. Such a property is rigorously forbidden in homogeneo
Publikováno v:
Nature. 404:740-743
Photonic crystals are attracting current interest for a variety of reasons, such as their ability to inhibit the spontaneous emission of light1,2. This and related properties arise from the formation of photonic bandgaps, whereby multiple scattering
Publikováno v:
Journal of Materials Science: Materials in Electronics. 10:429-440
In this paper, we present the design, fabrication and initial optical testing of dielectric waveguide devices which incorporate photonic crystals with photonic band gaps (PBG) in the visible region of the spectrum. In the design of our devices we use
Autor:
G.J. Parker, Majd Zoorob, Maria Caterina Netti, Martin D. B. Charlton, N.M.B. Perney, Jeremy J. Baumberg
Publikováno v:
Applied Physics Letters. 85:354-356
We demonstrate the fabrication of superprism devices in photonic crystal waveguides with excellent transmission through 600 rows of 160nm diameter holes. Broadband spectral and angular measurements allow mapping of the chromatic refractivity. This sh
Autor:
G.J. Parker, Maria Caterina Netti, Majd Zoorob, Chris E. Finlayson, James S. Wilkinson, Jeremy J. Baumberg, Martin D. B. Charlton
Publikováno v:
Applied Physics Letters. 81:3927-3929
We demonstrate that ultrabroadband ultrashort-pulse white light supercontinua can be used to track the group velocity of photons in optical waveguides using a Kerr gate technique. Results on silicon nitride slab waveguides show both polarization bire
Autor:
T. Lee, Majd Zoorob, Wang Nang Wang, Martin D. B. Charlton, Duncan W. E. Allsopp, Philip A. Shields
Publikováno v:
Shields, P A, Charlton, M D B, Lee, T, Zoorob, M E, Allsopp, D W E & Wang, W N 2009, ' Enhanced light extraction by photonic quasi-crystals in GaN blue LEDs ', IEEE Journal of Selected Topics in Quantum Electronics, vol. 15, no. 4, pp. 1269-1274 . https://doi.org/10.1109/JSTQE.2009.2016674
The far-field profile of photonic quasi-crystal patterned and unpatterned LEDs, fabricated from commercial epitaxial substrates by electron beam lithography, has been measured prior to lapping and dicing. Emission enhancements reach a maximum of 62%,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8d85fa6b8b75299e98d765bdd852f29
https://purehost.bath.ac.uk/ws/files/367790/shields-15-4-2009.pdf
https://purehost.bath.ac.uk/ws/files/367790/shields-15-4-2009.pdf
Autor:
N.M.B. Perney, Majd Zoorob, S. Mahnkopf, Caterina M. Netti, Martin D. B. Charlton, Jeremy J. Baumberg
Publikováno v:
Optics express. 14(2)
Comprehensive reflectivity mapping of the angular dispersion of nanostructured arrays comprising of inverted pyramidal pits is demonstrated. By comparing equivalently structured dielectric and metallic arrays, diffraction and plasmonic features are r
Autor:
Duncan W. E. Allsopp, Wang Nang Wang, Szymon Lis, Thomas David Matthew Lee, Philip A. Shields, Majd Zoorob, Martin D. B. Charlton
Publikováno v:
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference.
Enhanced light extraction from photonic crystal light-emitting diodes etched into the device surface is described. Finite Difference Time Domain modeling indicates that scattering or absorption at the substrate-epilayer interface is the dominant limi
Autor:
G.J. Parker, Maria Caterina Netti, Majd Zoorob, Jeremy J. Baumberg, Thomas David Matthew Lee, Martin D. B. Charlton
Publikováno v:
Philosophical transactions. Series A, Mathematical, physical, and engineering sciences. 364(1838)
Arranging periodic, or quasi-periodic, regions of differing refractive index in one, two, or three dimensions can form a unique class of mesoporous structures. These structures are generally known as photonic crystals, or photonic quasicrystals, and