Results 1 to 10 of about 63,833 (175)
Highly dispersive photonic band-gap-edge optofluidic biosensors [PDF]
Journal of the European Optical Society-Rapid Publications, 2006 Highly dispersive photonic band-gap-edge optofluidic biosensors are studied theoretically. We demonstrate that these structures are strongly sensitive to the refractive index of the liquid, which is used to tune dispersion of the photonic crystal.
Xiao Sanshui, Mortensen Niels Asger
doaj +6 more sources
Lithographic band gap tuning in photonic band gap crystals [PDF]
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena, 1996 We describe the lithographic control over the spectral response of three-dimensional photonic crystals. By precise microfabrication of the geometry using a reproducible and reliable procedure consisting of electron beam lithography followed by dry etching, we have shifted the conduction band of crystals within the near-infrared.
Cheng, C. C. +3 more
openaire +4 more sources
Photonic band gap fiber accelerator [PDF]
Physical Review Special Topics. Accelerators and Beams, 2001 There are three requirements in making a traveling wave accelerator: longitudinal electric field, synchronization, and confinement. We present and analyze a conceptually new kind of charged particle accelerator, making use of a photonic band gap lattice ...
Xintian Eddie Lin
doaj +2 more sources
Phase Modulation of Photonic Band Gap Signal. [PDF]
Sci Rep, 2016 AbstractWe first investigate the probe transmission signal (PTS) and the four wave mixing band gap signal (FWM BGS) modulated simultaneously by the relative phase and the nonlinear phase shift in the photonic band gap (PBG) structure. The switch between the absorption enhancement of PTS and the transmission enhancement of PTS with the help of changing ...
Wang Z, Gao M, Mahesar AR, Zhang Y.
europepmc +4 more sources
Titania Photonic Crystals with Precise Photonic Band Gap Position via Anodizing with Voltage versus Optical Path Length Modulation [PDF]
Nanomaterials, 2019 Photonic crystals based on titanium oxide are promising for optoelectronic applications, for example as components of solar cells and photodetectors. These materials attract great research attention because of the high refractive index of TiO2.
Georgy A. Ermolaev +3 more
doaj +2 more sources
Transformation Optics with Photonic Band Gap Media [PDF]
Physical Review Letters, 2010 We introduce a class of optical media based on adiabatically modulated, dielectric-only, and potentially extremely low-loss, photonic crystals. The media we describe represent a generalization of the eikonal limit of transformation optics (TO). The foundation of the concept is the possibility to fit frequency isosurfaces in the k-space of photonic ...
Urzhumov, Yaroslav A, Smith, David R
openaire +4 more sources
Photonic Band Gap Materials [PDF]
Proceedings of European Meeting on Lasers and Electro-Optics CLEOE-96, 1996 It is now some time since Yablonovitch proposed the optical analogue of the electron band gap: periodically structured dielectrics may totally exclude light in certain frequency ranges. At the time this concept of a ‘phtonc insulator’ provoked a furore and not a little disbelieve, but the concept is now an accepted one and the attention of the ...
R. Biswas +4 more
+5 more sources
Photonic-Band-Gap Resonator Gyrotron [PDF]
Physical Review Letters, 2001 We report the design and experimental demonstration of a gyrotron oscillator using a photonic-band-gap (PBG) structure to eliminate mode competition in a highly overmoded resonator. The PBG cavity supports a TE(041)-like mode at 140 GHz and is designed to have no competing modes over a minimum frequency range delta omega/omega of 30% about the design ...
J R, Sirigiri +5 more
openaire +3 more sources
Results in Physics, 2023 Traditionally, in the application of photonic crystals, defect modes are mostly introduced in the photonic band gap to realize high-performance waveguides, and electromagnetic waves beyond the photonic band gap cannot be controlled in photonic crystals ...
Yonghui Zheng +6 more
doaj +1 more source
Band gap of silicon photonic crystal with square-lattice and windmill-shaped defects
Results in Physics, 2021 A new type of 2D square-lattice photonic crystal with different windmill-shaped defects is proposed. Based on the plane wave expansion method and super cell theory, the band gaps of defect models are numerically analyzed according to the symmetry. We aim
Liqiang Zhang +4 more
doaj +1 more source