Studies of short pulse propagation in 1D porous silicon based photonic crystals with spatially modulated photonic band gap

2014 ◽  
Author(s):  
D.A. Kopylov ◽  
E.A. Mamonov ◽  
S.E. Svyakhovskiy ◽  
A.I. Maydykovsky
Keyword(s):  
Porous Silicon ◽  
Photonic Crystals ◽  
Band Gap ◽  
Pulse Propagation ◽  
Photonic Band Gap ◽  
Short Pulse ◽  
Silicon Based ◽  
Photonic Band

Generation of the second optical harmonic in porous-silicon-based structures with a photonic band gap

JETP Letters ◽  
1999 ◽  
Vol 69 (4) ◽  
pp. 300-305 ◽  
Author(s):  
L. A. Golovan’ ◽  
A. M. Zheltikov ◽  
P. K. Kashkarov ◽  
N. I. Koroteev ◽  
M. G. Lisachenko ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Silicon Based ◽  
Optical Harmonic ◽  
Photonic Band

Fabrication of Flexible One-Dimensional Porous Silicon Photonic Band-Gap Structures

2003 ◽  
Vol 797 ◽  
Author(s):  
Natalya Tokranova ◽  
Bai Xu ◽  
James Castracane
Keyword(s):  
Refractive Index ◽  
Porous Silicon ◽  
Photonic Crystals ◽  
Band Gap ◽  
Dielectric Material ◽  
Photonic Band Gap ◽  
Bragg Reflector ◽  
One Dimensional ◽  
Fabry Perot ◽  
Photonic Band

Photonic crystals are periodic dielectric structures that have a photonic band gap to control the propagation of light in a certain wavelength range. This property offers a means to manipulate photons in the same way as electrons can be controlled in an atomic lattice. Porous silicon is an ideal candidate fo r the fabrication of photonic crystals because of the availability of a variety of silicon micromachining techniques. One-dimensional photonic crystals with customized parameters can be economically fabricated using porous silicon multilayer structures with periodically modulated porosity. Despite the structural non-homogeneities, porous silicon fabricated on a p-type Si substrate has optical properties similar to a dielectric material with a single effective refractive index. The exact value of the refractive index for each layer depends on its porosity. An engineered porosity can be obtained by changing the etching currents during the anodization process. This results in a modulation of the refractive index. A stack of alternating layers with high and low porosity produces a distributed Bragg reflector (DBR). Various designs incorporating multilayer porous silicon structures with an optical Fabry-Perot resonator and coupled microcavities are under development and can serve as an optical filter. Prototypes of such free-standing structures with 21–200 stacked layers to be used as DBRs, Fabry-Perot resonators or coupled microcavities are being fabricated. These structures are coated with polystyrenesulfonate on their backsides to increase mechanical strength and at the same time maintain flexibility. In this work, reflectance spectra of these porous silicon multilayers with and without polymer on the backside were measured. Simulations of the multilayer one-dimensional photonic crystals were performed to predic t the reflectance spectrum and optimize their structures before the fabrication and to compare to experimental data.

scholarly journals Spectroscopic Analysis of Fluorescent Proteins Infiltrated into Photonic Crystals-=SUP=-*-=/SUP=-

2020 ◽  
Vol 129 (7) ◽  
pp. 909
Author(s):  
N. Zhdanova ◽  
A. Pakhomov ◽  
S. Rodionov ◽  
Yu. Strokova ◽  
S. Svyakhovskiy ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Photonic Crystals ◽  
Band Gap ◽  
Fluorescent Proteins ◽  
Photonic Band Gap ◽  
Visible Spectral Range ◽  
Photonic Structures ◽  
Silicon Photonic ◽  
Photonic Density ◽  
Photonic Band

Spectral properties of enhanced-green uorescent protein and monomeric red uorescent protein in porous photonic structures have been studied. The uorescent proteins were successfully inЛtrated into porous silicon photonic structures with dirent positions of the photonic band gap in visible spectral range. The intensity of uorescence is enhanced in the spectral regions of high photonic density of states. The possibility to control the uorescence spectra by the structure with the photonic band gap is demonstrated. Keywords: photonic crystals, porous silicon, uorescent proteins, photonic band gap.

Photonic Band-Gaps in Porous Silicon Based Mirrors with a Ellipse Profile Refractive Index

2011 ◽  
Vol 236-238 ◽  
pp. 1811-1813
Author(s):  
Shuan Ming Li ◽  
Fu Ru Zhong ◽  
Zhen Hong Jia ◽  
Min Tian
Keyword(s):  
Refractive Index ◽  
Porous Silicon ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Unit Cell ◽  
Band Gaps ◽  
Index Structure ◽  
Photonic Band Gaps ◽  
Silicon Based ◽  
Photonic Band

We investigate the use of ellipse refractive index structure to enlarge photonic band-gap (PBG). The PBG structure was prepared on porous silicon with 10 unit cell. Each unit cell is consisting of 21 layers with the refractive index varying according to the envelope of the ellipse function. The width of this photonic band-gap is high to 451nm.

3-Dimensional Photonic Crystals at Optical Wavelengths

1998 ◽  
Vol 07 (02) ◽  
pp. 181-200 ◽  
Author(s):  
S. G. Romanov
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Stop Band ◽  
High Refractive Index ◽  
3 Dimensional ◽  
Optical Wavelength ◽  
Photonic Band Gap Materials ◽  
Optical Wavelengths ◽  
Photonic Band

Different experimental strategies towards the 3-dimensional photonic crystals operating at optical wavelength are classified. The detailed discussion is devoted to the recent progress in photonic crystals fabricated by template method — the photonic band gap materials on the base of opal. The control of photonic properties of opal-based gratings is achieved through impregnating the opal with high refractive index semiconductors and dielectrics. Experimental study demonstrated the dependence of the stop band behaviour upon the type of impregnation (complete or partial) and showed a way for approaching complete photonic band gap. The photoluminescence from opal- semiconductor gratings revealed suppression of spontaneous emission in the gap region with following enhancement of the emission efficiency at the low-energy edge of the gap.

scholarly journals Titania Photonic Crystals with Precise Photonic Band Gap Position via Anodizing with Voltage versus Optical Path Length Modulation

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 651 ◽  
Author(s):  
Ermolaev ◽  
Kushnir ◽  
Sapoletova ◽  
Napolskii
Keyword(s):  
Refractive Index ◽  
Photonic Crystals ◽  
Band Gap ◽  
Titanium Oxide ◽  
Effective Refractive Index ◽  
Photonic Band Gap ◽  
Voltage Versus ◽  
Research Attention ◽  
Anodic Titanium Oxide ◽  
Photonic Band

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. One of the promising routes to prepare photonic crystals based on titanium oxide is titanium anodizing at periodically changing voltage or current. However, precise control of the photonic band gap position in anodic titania films is a challenge. To solve this problem, systematic data on the effective refractive index of the porous anodic titanium oxide are required. In this research, we determine quantitatively the dependence of the effective refractive index of porous anodic titanium oxide on the anodizing regime and develop a model which allows one to predict and, therefore, control photonic band gap position in the visible spectrum range with an accuracy better than 98.5%. The prospects of anodic titania photonic crystals implementation as refractive index sensors are demonstrated.

scholarly journals Photonic band-gap guidance in high-porosity luminescent porous silicon

2001 ◽  
Vol 79 (19) ◽  
pp. 3017-3019 ◽  
Author(s):  
P. Ferrand ◽  
D. Loi ◽  
R. Romestain
Keyword(s):  
Porous Silicon ◽  
Band Gap ◽  
Photonic Band Gap ◽  
High Porosity ◽  
Photonic Band
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