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Photonics, Volume 7, Issue 2

June 2020 - 22 articles

Cover Story: A new conceptual platform for nonreciprocal space wave manipulation with unitary efficiency beyond the limits dictated by Lorentz reciprocity is introduced. The proposed concept is based on nonreciprocal metagratings composed of stationary bianisotropic inclusions synthesizing real moving media. As an example of nonreciprocal wave manipulation, the figure shows nonreciprocal circulation for space waves. The proposed platform does not require continuous profile of spatiotemporal modulation, but it simply consists of a periodic array of identical bianisotropic inclusions. In the proposed concept, there is no fundamental limit on conversion efficiency and no up- or downconversion of frequency happens. The period in the array is comparable to the wavelength, avoiding severe challenges to translate these concepts to higher frequencies. View this paper.
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Articles (22)

  • Article
  • Open Access
3 Citations
4,407 Views
23 Pages

End-to-End Real-Time Demonstration of the Slotted, SDN-Controlled NEPHELE Optical Datacenter Network

  • Konstantinos Tokas,
  • Giannis Patronas,
  • Christos Spatharakis,
  • Paraskevas Bakopoulos,
  • Angelos Kyriakos,
  • Giada Landi,
  • Eitan Zahavi,
  • Kostas Christodoulopoulos,
  • Muzzamil Aziz and
  • Richard Pitwon
  • + 4 authors

The NEPHELE hybrid electro-optical datacenter network (DCN) architecture is proposed as a dynamic network solution to provide high capacity, scalability, and cost efficiency in comparison to the existing DCN infrastructures. The details of the NEPHEL...

  • Review
  • Open Access
13 Citations
5,124 Views
15 Pages

Scattering Properties of PT-Symmetric Chiral Metamaterials

  • Ioannis Katsantonis,
  • Sotiris Droulias,
  • Costas M. Soukoulis,
  • Eleftherios N. Economou and
  • Maria Kafesaki

The combination of gain and loss in optical systems that respect parity–time (PT)-symmetry has pointed recently to a variety of novel optical phenomena and possibilities. Many of them can be realized by combining the PT-symmetry concepts with metamat...

  • Article
  • Open Access
5 Citations
5,466 Views
8 Pages

A Novel Microalgae Harvesting Method Using Laser Micromachined Glass Fiber Reinforced Polymers

  • Konstantina Tourlouki,
  • Vasiliki Tsavatopoulou,
  • Dimitris Alexandropoulos,
  • Ioannis D. Manariotis and
  • Simone Mazzucato

Microalgae are an ideal source for next-generation biofuels due to their high photosynthetic rate. However, a key process limitation in microalgal biofuel production is harvesting of biomass and extraction of lipids in a cost-effective manner. The ha...

  • Editorial
  • Open Access
1 Citations
3,466 Views
4 Pages

With the advent of integrated photonics, a crucial role is played by semiconductor diode lasers (SDLs) as coherent light sources. Old paradigms of semiconductor laser dynamics, like optical injection, external feedback and the coupling of lasers, reg...

  • Review
  • Open Access
32 Citations
5,852 Views
13 Pages

Recent Advances in Integrated Photonic Jet-Based Photonics

  • Igor V. Minin,
  • Cheng-Yang Liu,
  • Yury E. Geints and
  • Oleg V. Minin

The study of accelerating Airy-family beams has made significant progress, not only in terms of numerical and experimental investigations, but also in conjunction with many potential applications. However, the curvature of such beams (and hence their...

  • Article
  • Open Access
14 Citations
4,228 Views
10 Pages

Size Dependence of the Resonant Third-Order Nonlinear Refraction of Colloidal PbS Quantum Dots

  • Ivan D. Skurlov,
  • Evgeniia A. Ponomareva,
  • Azat O. Ismagilov,
  • Sergey E. Putilin,
  • Ilia A. Vovk,
  • Anastasiia V. Sokolova,
  • Anton N. Tcypkin and
  • Aleksandr P. Litvin

Due to their high resonant third-order nonlinear response, lead sulfide quantum dots (QDs) are potential materials for applications in the field of nonlinear optics. In this paper, we implement the Z-scan method to study the resonant nonlinear respon...

  • Letter
  • Open Access
1 Citations
2,874 Views
6 Pages

The dependence of the terahertz energy generated by two-color femtosecond ionizing pulses on intensities of both one-color components is studied. The numerical calculations are supported with analytical formulas which help to reveal the nature of the...

  • Article
  • Open Access
14 Citations
3,410 Views
14 Pages

Statistical Characteristics of a Twisted Anisotropic Gaussian Schell-Model Beam in Turbulent Ocean

  • Yonglei Liu,
  • Yuefeng Zhao,
  • Xianlong Liu,
  • Chunhao Liang,
  • Lin Liu,
  • Fei Wang and
  • Yangjian Cai

The analytical expression of the cross-spectral density function of a twisted anisotropic Gaussian Schell-model (TAGSM) beam transmitting in turbulent ocean is derived by applying a tensor method. The statistical properties, including spectral densit...

  • Article
  • Open Access
29 Citations
6,325 Views
16 Pages

New Solutions of Laser-Induced Fluorescence for Oil Pollution Monitoring at Sea

  • Oleg Bukin,
  • Dmitry Proschenko,
  • Chekhlenok Alexey,
  • Denis Korovetskiy,
  • Ilya Bukin,
  • Viktoria Yurchik,
  • Irina Sokolova and
  • Andrey Nadezhkin

Laser-induced fluorescence (LIF) spectral features for oil products of different states (solutions in the seawater and thin slicks) are discussed in this article. This research was done to evaluate LIF application for the identification of oil produc...

  • Letter
  • Open Access
2 Citations
3,388 Views
8 Pages

Free Electron Laser Measurement of Liquid Carbon Reflectivity in the Extreme Ultraviolet

  • Sumana L. Raj,
  • Shane W. Devlin,
  • Riccardo Mincigrucci,
  • Craig P. Schwartz,
  • Emiliano Principi,
  • Filippo Bencivenga,
  • Laura Foglia,
  • Alessandro Gessini,
  • Alberto Simoncig and
  • Gabor Kurdi
  • + 2 authors

Ultrafast time-resolved extreme ultraviolet (EUV) reflectivity measurements of optically pumped amorphous carbon (a-C) have been performed with the FERMI free electron laser (FEL). This work extends the energy range used in previous reflectivity stud...

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Photonics - ISSN 2304-6732