Principle and Applications of the Coupling of Surface Plasmons and Excitons

Surface plasmons have been attracting increasing attention and have been studied extensively in recent decades because of their half-light and half-material polarized properties. On the one hand, the tightly confined surface plasmonic mode may reduce the size of integrated optical devices beyond the diffraction limit; on the other hand, it provides an approach toward enhancement of the interactions between light and matter. In recent experiments, researchers have realized promising applications for surface plasmons in quantum information processing, ultra-low-power lasers, and micro-nano processing devices by using plasmonic structures, which have demonstrated their superiority over traditional optics structures. In this paper, we introduce the theoretical principle of surface plasmons and review the research work related to the interactions between plasmons and excitons. Some perspectives with regard to the future development of plasmonic coupling are also outlined.

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A high-performance TE modulator/TM-pass polarizer using selective mode shaping in a VO2-based side-polished fiber

Nanophotonics ◽

10.1515/nanoph-2021-0225 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Mohsen Heidari ◽

Vahid Faramarzi ◽

Zohreh Sharifi ◽

Mahdieh Hashemi ◽

Shahram Bahadori-Haghighi ◽

...

Keyword(s):

High Performance ◽

Extinction Ratio ◽

Three Dimensional ◽

Optical Modulator ◽

Conducting Phase ◽

Integrated Optical ◽

Integrated Optical Devices ◽

The One ◽

Side Polished Fiber ◽

Heat Transfer Calculation

Abstract The reversible insulating-to-conducting phase transition (ICPT) of vanadium dioxide (VO2) makes it a versatile candidate for the implementation of integrated optical devices. In this paper, a bi-functional in-line optical device based on a four-layer stack of PMMA/graphene/VO2/graphene deposited on a side-polished fiber (SPF) is proposed. The structure can be employed as an ultra-compact TE modulator or a TM-pass polarizer, operating at 1.55 μm. We show that the ICPT characteristic can be used for polarization-selective mode shaping (PSMS) to manipulate orthogonal modes separately. On the one hand, as an optical modulator, the PSMS is used to modify mode profiles so that the TE mode attenuation is maximized in the off-state (and IL is minimized in the on-state), while the power carried by the TM mode remains unchanged. As a result, a TE modulator with an ultrahigh extinction ratio (ER) of about ER = 165 dB/mm and a very low insertion loss (IL) of IL = 2.3 dB/mm is achieved. On the other hand, the structure can act as a TM-pass polarizer featuring an extremely high polarization extinction ratio (PER) of about PER = 164 dB/mm and a low TM insertion of IL = 3.86 dB/mm. The three-dimensional heat transfer calculation for the ICPT process reveals that the response time of the modulator is in the order of few nanoseconds. Moreover, the required bias voltage of the proposed device is calculated to be as low as 1.1 V. The presented results are promising a key step towards the realization of an integrated high-performance in-line modulator/polarizer.

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MODELING OF FIBER-OPTIC COMMUNICATION CHANNEL FOR QUANTUM CRYPTOGRAPHIC SYSTEMS

Issues of radio electronics ◽

10.21778/2218-5453-2019-4-90-95 ◽

2019 ◽

pp. 90-95

Author(s):

V. A. Minaev ◽

I. D. Korolev ◽

O. A. Kulish ◽

A. V. Mazin

Keyword(s):

Information Transmission ◽

Information Transfer ◽

Fiber Optic ◽

Single Photon ◽

Optical Devices ◽

Energy Losses ◽

Integrated Optical ◽

Integrated Optical Devices ◽

Fiber Optic Communication ◽

Optic Communication

The existing methods of information delivery to the strategic and tactical management of many government agencies are expensive, not always reliable and efficient. Therefore, quantum cryptographic systems (QCS) have been actively developed in recent years. However, there are problems with the use of the QCS associated with the reliability of information transfer. First, the existing fiber-optic communication channels (FOCC) are not designed to transmit single-photon signals, which leads to the complexity of their cryptographic protection. The second is insufficiently methodically developed calculation of energy losses and errors in the evaluation of the characteristics of information transfer in FOCC QCS. In article the analysis of the energy loss factors in the classical fiber-optic channel is carried out and the additive loss formula is discussed in detail. Then we consider the fiber-optic channel of quantum information transmission with the use of integrated optical devices. The additive formula of optical losses in such a channel is discussed. The features of losses in integrated optical devices are shown. The features of quantum cryptographic system of information transmission are considered. As a result, the model of FOCC QCS taking into account energy losses is presented, which allows competently in theoretical terms and visualize the passage of information through modern quantum cryptographically secure telecommunications while providing control in government structures.

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Quantum Polaritonic

10.1093/oso/9780198782995.003.0011 ◽

2017 ◽

Author(s):

Alexey V. Kavokin ◽

Jeremy J. Baumberg ◽

Guillaume Malpuech ◽

Fabrice P. Laussy

Keyword(s):

Phase Transitions ◽

Quantum Information ◽

Quantum Information Processing ◽

Quantum Phase Transitions ◽

Macroscopic Quantum ◽

Quantum Simulations ◽

Macroscopic Quantum Phenomena ◽

Microcavity Polaritons ◽

Quantum Phenomena ◽

The One

Microcavity polaritons have demonstrated their unique propensity to host macroscopic quantum phenomena. While they appear to be highly promising for applications in a classical realm, they are still far from competing even with decade old electronics. Another playground where polaritons could emerge as strong contenders is the microscopic quantum regime with single-particle effects and nonlinearities at the one-polariton level. Several theoretical proposals exist to explore polariton blockade mechanisms, realize sophisticated quantum phase transitions, implement quantum simulations and/or quantum information processing, thereby opening a new page of the polariton physics when such ideas will be implemented in the laboratory.

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Risk of Increased Acceptance for Organizational Nepotism and Cronyism during the COVID-19 Pandemic

Risks ◽

10.3390/risks9040059 ◽

2021 ◽

Vol 9 (4) ◽

pp. 59

Author(s):

Grzegorz Ignatowski ◽

Łukasz Sułkowski ◽

Bartłomiej Stopczyński

Keyword(s):

Qualitative Study ◽

Quantitative Methods ◽

Research Work ◽

Negative Effects ◽

Qualitative And Quantitative ◽

Qualitative And Quantitative Methods ◽

Work Related ◽

Social And Economic Development ◽

The Times ◽

The Impact

Nepotism and cronyism are forms of favoritism towards certain people in the workplace. For this reason, they constitute a problem for organization managers, ethicists and psychologists. Identifying the impact of COVID-19 pandemic on the increase of nepotism and cronyism may provide a basis for organizations to assess their extent and to take possible measures to prevent their negative effects. At the same time, the research presented in the article may provide a basis for further research work related to nepotism and cronyism at the times of other threats, different from the pandemic. The aim of the article is to examine the impact of the COVID-19 pandemic on growing acceptance for nepotism and cronyism in Polish enterprises. Qualitative and quantitative methods have been included in the conducted research. Qualitative study aimed at improving knowledge of nepotism and cronyism and the impact of the COVID-19 pandemic on these phenomena, followed by a quantitative study conducted in order to verify the information obtained in the qualitative study. This research has demonstrated that Nepotism and cronyism in the workplace, are phenomenon that are basically evaluated negatively. They adversely influences social and economic development, but the impact of COVID-19 pandemic on nepotism and cronyism is not significant.

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Polymer integrated optical devices for telecommunications applications

10.1117/12.305408 ◽

1998 ◽

Cited By ~ 4

Author(s):

Robert A. Norwood ◽

Robert Blomquist ◽

Louay A. Eldada ◽

Cathy Glass ◽

Constantina Poga ◽

...

Keyword(s):

Optical Devices ◽

Integrated Optical ◽

Integrated Optical Devices

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Cultural Sustainability in University Students’ Flamenco Music Event Attendance: A Neural Networks Approach

Sustainability ◽

10.3390/su13052911 ◽

2021 ◽

Vol 13 (5) ◽

pp. 2911

Author(s):

Jesús Manuel De Sancha-Navarro ◽

Juan Lara-Rubio ◽

María Dolores Oliver-Alfonso ◽

Luis Palma-Martos

Keyword(s):

University Students ◽

Cultural Capital ◽

Research Work ◽

Cultural Consumption ◽

Cultural Sustainability ◽

Intangible Heritage ◽

Live Music ◽

Socioeconomic Profile ◽

The One ◽

The Relationship

University students consume live music; however, almost 40% declare that they have never attended a flamenco show, an intangible heritage of humankind. Numerous studies have shown that cultural capital and socioeconomic profile, among other factors, are variables that influence cultural consumption, and therefore, cultural sustainability. Considering the relationship between several variables, this paper pursues a double objective. On the one hand, identifying the factors that influence attendance at flamenco shows, and on the other, proposing a predictive model that quantifies the likelihood of an individual attending a flamenco show. To this end, we analyse flamenco consumption by means of a survey conducted on 452 university students, using Multilayer Perceptrom (a non-parametric model), a methodology based on an artificial neural network. Our results confirm the importance of cultural capital, as well as personal and external factors, among other. The findings of this research work are of potential interest for management and planning of cultural events, as well as to promote cultural sustainability.

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Local Information as an Essential Factor for Quantum Entanglement

Entropy ◽

10.3390/e23060728 ◽

2021 ◽

Vol 23 (6) ◽

pp. 728

Author(s):

Zhaofeng Su

Keyword(s):

Quantum Entanglement ◽

Quantum Information Processing ◽

Local Information ◽

Essential Factor ◽

Qubit System ◽

Local Vectors ◽

Correlation Parameters ◽

The One ◽

Local Parameters

Quantum entanglement is not only a fundamental concept in quantum mechanics but also a special resource for many important quantum information processing tasks. An intuitive way to understand quantum entanglement is to analyze its geometric parameters which include local parameters and correlation parameters. The correlation parameters have been extensively studied while the role of local parameters have not been drawn attention. In this paper, we investigate the question how local parameters of a two-qubit system affect quantum entanglement in both quantitative and qualitative perspective. Firstly, we find that the concurrence, a measure of quantum entanglement, of a general two-qubit state is bounded by the norms of local vectors and correlations matrix. Then, we derive a sufficient condition for a two-qubit being separable in perspective of local parameters. Finally, we find that different local parameters could make a state with fixed correlation matrix separable, entangled or even more qualitatively entangled than the one with vanished local parameters.

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