Temat: photonic - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Recent advances in PBG structures
Autorzy:: Vorgul, I.Yu.
Marciniak, M.
Powiązania:: https://bibliotekanauki.pl/articles/308757.pdf
Data publikacji:: 2000
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: photonic band gap
photonic crystals
optical communications
Opis:: We propose a review of word science achievements in the extremely extended for the recent few years field of photonic band gap structures The review concerns both theoretical and experimental investigations on PBG structures toward fabrication of the most optimal ones for different applications. The attention is given to the obtained results as well as to the used and developed methods.
Źródło:: Journal of Telecommunications and Information Technology; 2000, 1-2; 71-76
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A Photonic-Crystal Selective Filter
Autorzy:: Pajewski, L.
Schettini, G.
Powiązania:: https://bibliotekanauki.pl/articles/308475.pdf
Data publikacji:: 2017
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: filter
Fourier Modal Method
periodic structures
photonic bandgap materials
photonic crystals
Opis:: A highly selective filter is designed, working at 1.55 μm and having a 3-dB bandwidth narrower than 0.4 nm, as is required in Dense Wavelength Division Multiplexed systems. Different solutions are proposed, involving photonic crystals made rectangular- or circular-section dielectric rods, or else of holes drilled in a dielectric bulk. The polarization and frequency selective properties are achieved by introducing a defect in the periodic structure. The device is studied by using in-house codes implementing the full-wave Fourier Modal Method. Practical guidelines about advantages and limits of the investigated solutions are given.
Źródło:: Journal of Telecommunications and Information Technology; 2017, 3; 107-112
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fabrication of photonic crystal structures by laser lithography
Autorzy:: Mizeikis, V.
Seet, K. K.
Juodkazis, S.
Misawa, H.
Powiązania:: https://bibliotekanauki.pl/articles/385210.pdf
Data publikacji:: 2009
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:: photonic crystals
laser lithography
Opis:: Using femtosecond laser lithography technique, we have fabricated 3D PhC structures having woodpile and spiral architectures in photoresists, and investigated their photonic properties. The fabricated structures exhibit good structural quality, evidenced by long-range periodicity and absence of deformations, and photonic stop-gaps at nearinfrared and infrared wavelengths, evidenced by spectral bands of high reflectivity. These structures can be used as templates for further enhancement by infiltration of metals or high refractive index materials, such as Si.
Źródło:: Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 99-101
1897-8649
2080-2145
Pojawia się w:: Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Telecommunication filter based on the symmetrical photonic crystal Bg5/Cu1/Bg5
Autorzy:: Baraket, Z.
Zaghdoudi, J.
Kanzari, M.
Powiązania:: https://bibliotekanauki.pl/articles/175028.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: symmetry
telecommunication
photonic crystals
Opis:: Thanks to the transfer matrix method, we perform a theoretical investigation of the optical properties of the symmetrical photonic crystal designed as Bg₅/Cu₁/Bg₅, where Cu₁ is the first generation of the copper mean sequence and Bg₅ is the fifth generation of the Bragg sequence. We design a developed polychromatic filter which allows the transmission of all the telecommunication wavelengths 0.85, 1.3, and 1.55 µm at oblique incidence for both of TE and TM polarization with a high transmission rate and high quality factor. This photonic crystal can be employed in the fabrication of telecommunication devices.
Źródło:: Optica Applicata; 2018, 48, 3; 361-371
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Światłowody fotoniczne
Photonic crystal fibers
Autorzy:: Grabiec, W.
Powiązania:: https://bibliotekanauki.pl/articles/208325.pdf
Data publikacji:: 2006
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: światłowody mikrostrukturalne
światłowody fotoniczne
kryształy fotoniczne
fotoniczna przerwa wzbroniona
microstructured fibers
photonic crystal fibers
photonic crystals
photonic band gap
Opis:: Światłowody fotoniczne stanowią nową klasę włókien optycznych, charakteryzujących się wieloma nowymi, niezwykle interesującymi właściwościami. Jedną z nich jest możliwość kształtowania parametrów włókna poprzez modelowanie parametrów jego geometrii na etapie poprzedzającym proces produkcji. W artykule przedstawiono ideę działania światłowodów fotonicznych, ich klasyfikację, budowę oraz własności, które są przydatne głównie pod kątem aplikacji telekomunikacyjnych.
Photonic crystal fibers (PCFs) are a new class of fiber optics that are characterized by a set of new interesting features. One of them is the possibility of shaping the fiber parameters through modelling its geometry before a production process. The idea of PCFs operation, their structures and features in the light of using them in telecommunication applications are presented as well. Short characteristic of manufacturing methods of PCFs are also presented here.
Źródło:: Biuletyn Wojskowej Akademii Technicznej; 2006, 55, sp.; 241-256
1234-5865
Pojawia się w:: Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Basic Logic Gates in Two Dimensional Photonic Crystals for All Optical Device Design
Autorzy:: Sonth, Mahesh V
Srikanth, Gimmadi
Agrawal, Pankaj
Premalatha, B.
Powiązania:: https://bibliotekanauki.pl/articles/1844637.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: basic gates
photonic crystals
finite difference time domain
plane wave expansion
photonic band gap
Opis:: The research carried out in the field of optics and photonics with an idea to design and develop the all optical logic devices in the fascinating material known as photonic crystals (PhCs). The structural investigation reveals that the two dimensional (2-D) PhCs is more suitable for fabrication of optoelectronic components. In this article we have designed basic logic gates in 2-D PhCs as they are the building blocks for the construction of optical devices and in these, refractive index is periodically modulated with the wavelength. The understanding of light behaviour in complex PhCs helps in creating photonic band gap (PBG) that can prevent light of certain wavelength propagating in crystal lattice structure. For the selected geometry structure, three PBG bands will exists out of which two of them are transverse electric (TE) and one is transverse magnetic (TM) mode. The PBG bands in the TE mode ranges from 0.31( α λ ) to 0.46( α λ ), 0.61( α λ ) to 0.63( α λ ) and TM mode ranges from 0.86( α λ ) to 0.93( α λ ). The free space wavelength of 1550 nm is set for the finite difference time domain (FDTD) simulation of the structure. The response time and computational overhead required for the proposed OR gate is 0.128ps and 4.4MB is obtained. Also we calculated the extinction ratio for AND gate and NOT gate as 6.19 dB and 10.21 dB respectively.
Źródło:: International Journal of Electronics and Telecommunications; 2021, 67, 2; 247-261
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Dielectric photonic quasi-crystals with doubled quasi-periodicity
Autorzy:: Vorgul, I.Yu.
Marciniak, M.
Powiązania:: https://bibliotekanauki.pl/articles/308759.pdf
Data publikacji:: 2000
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: photonic crystals
optical pulse transformation
Opis:: Optical range electromagnetic field interaction with inhomogeneous finite dielectric media is investigated. New method for analysis of this interaction in 1D case based on integral equations for fields in transient media is proposed. Some special cases of quasi-periodical structures with doubled quasi-periodicity are investigated numerically. A possibility to obtain good filtering properties in such structures for small number of quasi-periods is shown.
Źródło:: Journal of Telecommunications and Information Technology; 2000, 1-2; 77-79
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The effect of the symmetrical deformation y = xk + 1 on the optimization of the symmetrical multiple channeled white light color filter
Autorzy:: Baraket, Z.
Zaghdoudi, J.
Kanzari, M.
Powiązania:: https://bibliotekanauki.pl/articles/173545.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: photonic crystals
symmetry
filter
polarization
optimization
Opis:: In this paper, we consider a hybrid photonic crystal symmetrically deformed (Bg₅/Cu₃/Bg₅) consisting of the third generation of the copper mean sequence (Cu₃), sandwiched between two Bragg mirrors at the fifth generation (Bg₅). Our system realizes a polychromatic filter that transmits five wavelengths in the visible spectrum independently of the polarization of the light transverse electric or transverse magnetic. Secondly, the photonic crystal (Bg₅/Cu₃/Bg₅) undergoes the deformation y = x^{k + 1} (where k is the degree of deformation, x and y are respectively the coordinates of the system before and after the deformation). With a proper choice of the degree of deformation k, this photonic crystal maintains its property of polychromatic filter whose transmission wavelength is independent of the polarization’s state. Thanks to this deformation, we can disperse the optical windows in different spectra of visible light and exactly in the violet, blue, green, and orange light. This system can be used in the fabrication of color filter devices and the white light emitting diodes.
Źródło:: Optica Applicata; 2017, 47, 1; 19-28
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Defect modes properties in one-dimensional photonic crystals employing a superconducting nanocomposite material
Autorzy:: Aly, A. H.
Elsayed, H. A.
Malek, C.
Powiązania:: https://bibliotekanauki.pl/articles/173888.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: photonic crystals
band gap
defect mode
nanocomposite
Opis:: In the present work, we investigate theoretically the transmission characteristics of one-dimensional photonic crystals that contain a defect layer of a nanocomposite material in infrared radiation. The theoretical treatment is obtained depending on the fundamentals of the characteristic matrix method. Here, the nanocomposite designed from nanoparticles of a superconducting material is arranged into a dielectric medium. The numerical results clarify the acute effect of the volume fraction and the operating temperature on the effective permittivity of the nanocomposite material. Therefore, the volume fraction, the operating temperature and other parameters such as the permittivity of the dielectric material and the threshold frequency could have a significant effect on the characteristics of the defect modes. Thus, our structure may be very promising in many applications such as narrow band filters and among optoelectronic applications.
Źródło:: Optica Applicata; 2018, 48, 1; 53-64
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Optical gain in one-dimensional photonic band gap structures with n-i-p-i crystal layers
Autorzy:: Nefedov, I.S.
Gusyatnikov, V.N.
Marciniak, M.
Kononenko, V.K.
Ushakov, D.V.
Powiązania:: https://bibliotekanauki.pl/articles/308163.pdf
Data publikacji:: 2002
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: photonic crystals
doping superlattice
optical gain
tunable source
Opis:: The gain enhancement in a layered periodic photonic band gap structure containing active medium based on GaAs n-i-p-i superlattices separated by A1GaAs layers is analyzed. The dependences of extinction coefficient and refractive index on excitation level and wavelength are presented. Transmission characteristics of a probe light versus excitation level are calculated. It is shown that the threshold of generation can be essentially reduced if the wavelength of probe light falls to the band gap edge.
Źródło:: Journal of Telecommunications and Information Technology; 2002, 1; 60-64
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Modeling of thermal tunable multichannel filter using defective metallic photonic crystals
Autorzy:: Gharaati, A.
Zare, Z.
Powiązania:: https://bibliotekanauki.pl/articles/174165.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: photonic crystals
temperature dependent refractive index
multichannel filter
defective mode
Opis:: The transmission spectra of one dimensional metallic photonic crystal containing defects are studied using a transfer matrix method. We consider silver as a defect layer with a refractive index dependent on wavelength and temperature simultaneously. Since the loss factor of silver is the function of temperature, we should find a structure that has sharp transmission peaks to model a filter. We present the structure with a coupled defect. It is found that the number of transmission resonant peaks is equal to the number of coupled defects and they are tunable with temperature and incident angle.
Źródło:: Optica Applicata; 2017, 47, 4; 611-619
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Computer simulation and modeling of solar energy based on photonic band gap materials
Autorzy:: Aly, A. H.
Sayed, H.
Powiązania:: https://bibliotekanauki.pl/articles/174792.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: photovoltaic
thermal energy
renewable energy
photonic crystals
anti-reflection coating
Opis:: In this paper, we have obtained theoretically a convenient way to improve the tandem solar cell efficiency by using one-dimensional binary photonic crystals in the anti-reflection coating and intermediate reflective layer. Also, we design and simulate our structure by using two different methods; MATLAB program based on a transfer matrix method and COMSOL Multiphysics software based on a finite element method. We have obtained the localization of the photons energy on the appropriate cell and then reduced the energy losses by controlling the photonic band gap. The present design is more convenient for cold countries.
Źródło:: Optica Applicata; 2018, 48, 1; 117-126
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Design of a novel photonic crystal 1.31/1.55 µm bi-band filter for near infrared application
Autorzy:: Lallam, F.
Badaoui, H.
Abri, M.
Fedaouche, A.
Powiązania:: https://bibliotekanauki.pl/articles/173714.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: finite-difference time-domain
FDTD
photonic crystals
waveguide
W1KA
selective filters
Opis:: A novel design of a double selective filter for integrated optics in two-dimensional photonic crystals operating at a wavelength of 1.31 and 1.55 µm is proposed in this paper. We focus particularly on filters transmission and selectivity enhancement. The two-dimensional photonic crystals filters are simulated by using a combination of three cascaded waveguides; these later are conceived by one missing row and with different rods radii for efficient filtering purpose. The properties of these photonic crystal structures are numerically investigated by using the two-dimensional finite-difference time-domain method and the numerical results are given for incident light wave having transverse electrical polarization. A final synthesized filter topology is presented and the maximum of transmission is found around 70% and 60% localized respectively near 1.31 and 1.55 µm wavelengths.
Źródło:: Optica Applicata; 2018, 48, 3; 341-348
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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