Constructing a light-field distribution for the laser guiding of atoms in photonic crystals

Tarasishin, A.V.; Magnitskii, S. A.; Shuvaev, V. A.; Желтиков, А. М.

doi:10.1016/s0030-4018(00)00942-1

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…Photonic bandgap (PBG) is one of the important characteristics used to determine the range of wavelengths in which the proposed structure can be functional [2]. Defects can be manipulated in the PhC structures thereby to achieve the desired forbidden bandgap of operation [3]. The Finite Difference Time Domain (FDTD) method has been used to analyze the PhC structures for the propagation of light along with the defects [4].…”

Section: Introductionmentioning

confidence: 99%

Ultra-compact all-optical logical circuits for photonic integrated circuits

Sridarshini¹,

Geerthana²,

Balaji³

et al. 2023

Laser Phys.

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In this paper, a photonic crystal based ultra-compact Optical XOR gate followed by an optical half-subtractor is proposed. Plane wave expansion is used to evaluate the photonic bandgap of the devised structure. The output and efficiency of logical circuits can be improved by maintaining distinct thresholds for the output logic states, thereby enabling the design to operate even in low power inputs. Reliability of the structure is enhanced by retaining a threshold for the output value. The performance of the proposed circuit is examined using the Finite Difference Time Domain method. The output is considered as logic 1 when the power level exceeds 0.7 μW and logic ‘0’ if it is below 0.35 μW. The proposed logical circuit has high contrast ratio. The XOR gate has a contrast ratio of about 12.55 dB, and the half subtractor has 7.78 dB and 11.76 dB for Difference and Borrow respectively. These devices work at 1550 nm wavelength and are ultra-compact in size. The proposed structure of logic gates will be suitable for photonic integrated circuits due to its ultra-small and simple design.

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Section: Introductionmentioning

confidence: 99%

Ultra-compact all-optical logical circuits for photonic integrated circuits

Sridarshini¹,

Geerthana²,

Balaji³

et al. 2023

Laser Phys.

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“…The PBG of PC structures is usually tuned by changing the refractive index of the materials, the shape and size of the rods or holes and the period of the structures [6][7][8][9][10]. The idea of a PBG allows a PC to be used for realization of micro/nanoscale integrated photonic devices, for example optical filters [11,12], reflectors [13], switches [14,15], logic gates [16][17][18], lasers [19], modulators [20,21], sensors [22,23], optical bends and splitters [24], optical switching [25], demultiplexers [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44], channel drop filters (CDFs) [45][46][47][48][49][50][51][52]…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of a channel drop filter and demultiplexer based on a photonic crystal super ellipse-shaped ring resonator

Radhouene¹,

Gharsallah²,

Balaji³

et al. 2022

Laser Phys.

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In advanced optical communication systems, a photonic crystal (PC) based channel drop filter (CDF) and dense wavelength division multiplexer (DWDM) demultiplexer are essential components in the design of a complete DWDM system, which offers a high transmission data rate. In the present work, a novel PC, CDF filter and demultiplexer based on a ring resonator with a super ellipse shape is designed and analyzed. To design a high-performance device, the performance parameters of the proposed components, such as transmission efficiency, spectral line width, channel spacing, Q-factor and crosstalk, are investigated. The proposed CDF is designed to drop a resonant wavelength with a high quality factor of 3955, and the ring resonator design is extended to the demultiplexer. The demultiplexer is designed to drop the four resonant wavelengths of 1579.8 nm, 1582 nm, 1583.6 nm and 1574.9 nm, respectively. The observed high quality factor (3955), bandwidth (0.4 nm) and transmission efficiency (90%) of the proposed demultiplexer will support high-performance DWDM systems

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“…To realize this form of dynamic control, atomic coherence must be created by using electromagnetically induced transparency and the Raman effect [20,21]. This issue has been illustrated in a few reports; e.g., Tarasishin et al [22] studied coherent laser-atom interaction in the defect-mode regime of a 2D PC, Krokhin and Halevi [23] examined the influence of weak dissipation on the photonic band structure, and He et al [24] focused on the effects of resonant absorption and inhomogeneously broadened spin transitions on the reflection and absorption spectra.…”

Section: Introductionmentioning

confidence: 99%

Optical characteristics of a two-dimensional dielectric photonic crystal immersed in a coherent atomic gas

Serebryannikov

Lakhtakia

2012

J. Opt. Soc. Am. B

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We studied the specular and nonspecular remittances and the absorptance of two-dimensional photonic crystals (PCs) comprising a periodic array of dielectric rods immersed in a coherent atomic gas (CAG). Illumination by obliquely incident, s-polarized plane waves was considered. Minipassbands that may include peaks of nearly complete transmission appear within the stop bands of the corresponding gas-free PCs, due to the strong frequency dispersion in the relative permittivity of the CAG. As a result, high-efficiency passbands of a gas-free PC and those arising due to the CAG can coexist. The latter can be tuned in a simpler way than by varying the constitutive parameters of the CAG, i.e., via variation of the incidence angle. In contrast with the earlier studied metallic PCs immersed in a CAG, new passbands may also appear when the CAG behaves as a medium with ultralow positive permittivity. Also, complete absorptance bands (with zero overall reflectance and overall transmittance) can be obtained, which are well correlated with the frequency-dependent characteristics of the CAG.

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Constructing a light-field distribution for the laser guiding of atoms in photonic crystals

Cited by 6 publications

References 25 publications

Ultra-compact all-optical logical circuits for photonic integrated circuits

Ultra-compact all-optical logical circuits for photonic integrated circuits

Design and analysis of a channel drop filter and demultiplexer based on a photonic crystal super ellipse-shaped ring resonator

Optical characteristics of a two-dimensional dielectric photonic crystal immersed in a coherent atomic gas

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