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Crystals, Volume 9, Issue 6

June 2019 - 48 articles

Cover Story: The recent advances in liquid crystal (LC) beam steering devices are reviewed. We first describe the general operation principles of LC beam steerers. Next, we delve into different kinds of beam steering devices and propose a new LC‐cladding waveguide beam steerer using resistive electrodes. Finally, two future challenges are addressed: fast-response beam steering for mid‐wave infrared (MWIR), and large‐angle, high‐efficiency, and continuous beam steering by device hybridization. With new low‐loss polymer network LCs, fast-response transmission‐type optical phased arrays for MWIR can be achieved. View this paper
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Articles (48)

  • Article
  • Open Access
12 Citations
7,132 Views
14 Pages

Ice Crystal Coarsening in Ice Cream during Cooling: A Comparison of Theory and Experiment

  • Jingyi Mo,
  • Robert D. Groot,
  • Graham McCartney,
  • Enyu Guo,
  • Julian Bent,
  • Gerard van Dalen,
  • Peter Schuetz,
  • Peter Rockett and
  • Peter D. Lee

25 June 2019

Ice cream is a complex multi-phase structure and its perceived quality is closely related to the small size of ice crystals in the product. Understanding the quantitative coarsening behaviour of ice crystals will help manufacturers optimise ice cream...

  • Article
  • Open Access
5 Citations
4,171 Views
11 Pages

Field-Independent Features in the Magnetization and Specific Heat of Sm3Co4Ge13

  • Harikrishnan S. Nair,
  • K. Ramesh Kumar,
  • Baidyanath Sahu,
  • Sindisiwe P. Xhakaza,
  • Pramita Mishra,
  • Debkanta Samal,
  • Sarit K. Ghosh,
  • Biju R. Sekhar and
  • André M. Strydom

25 June 2019

The cubic intermetallic compound Sm 3Co 4Ge 13 (space group P m 3 ¯ n ) possesses a cage-like structure composed of Ge and displays an antiferromagnetic transition at T N ≈ 6 K in magnetization, M ( T )...

  • Article
  • Open Access
15 Citations
5,134 Views
15 Pages

Supramolecular Assemblies in Pb(II) Complexes with Hydrazido-Based Ligands

  • Ghodrat Mahmoudi,
  • Saikat Kumar Seth,
  • Fedor I. Zubkov,
  • Elena López-Torres,
  • Alessia Bacchi,
  • Vladimir Stilinović and
  • Antonio Frontera

25 June 2019

Herein, we describe the synthesis and single crystal X-ray diffraction characterization of several Pb(II) complexes using Schiff base hydrazido-based ligands and different counterions (NO3−, I− and ClO4). In the three complexes reported i...

  • Article
  • Open Access
9 Citations
4,567 Views
10 Pages

24 June 2019

The ruthenium carbonyl compounds, Ru(bpy)(CO)2X2 (X = Cl, Br or I) act as neutral halogen bond (XB) acceptors when co-crystallized with 1,4-diiodotetrafluoro-benzene (DITFB). The halogen bonding strength of the Ru-X⋅⋅⋅I halogen bonds f...

  • Article
  • Open Access
23 Citations
9,139 Views
11 Pages

24 June 2019

A 2.45 GHz microwave-plasma chemical-vapor deposition (MPCVD) reactor was designed and built in-house by collaborating with Guangdong TrueOne Semiconductor Technology Co., Ltd. A cylindrical cavity was designed as the deposition chamber and a circumf...

  • Article
  • Open Access
33 Citations
7,083 Views
11 Pages

High-Responsivity Photovoltaic Photodetectors Based on MoTe2/MoSe2 van der Waals Heterojunctions

  • Hao Luo,
  • Bolun Wang,
  • Enze Wang,
  • Xuewen Wang,
  • Yufei Sun and
  • Kai Liu

19 June 2019

Van der Waals heterojunctions based on transition metal dichalcogenides (TMDs) show promising potential in optoelectronic devices, due to the ultrafast separation of photoexcited carriers and efficient generation of the photocurrent. Herein, this stu...

  • Article
  • Open Access
6 Citations
4,290 Views
8 Pages

Structural Insights into the Two-Step Spin-Crossover Compound Fe(3,4-dimethyl-pyridine)2[Ag(CN)2]2

  • José Alberto Rodríguez-Velamazán,
  • Kosuke Kitase,
  • Elías Palacios,
  • Miguel Castro,
  • Ángel Fernández-Blanco,
  • Ramón Burriel and
  • Takafumi Kitazawa

19 June 2019

The crystal structure of the polymeric spin crossover compound Fe(3,4-dimethyl-pyridine)2[Ag(CN)2]2 has been solved and its temperature dependence followed by means of single-crystal and powder X-ray diffraction. This compound presents a two-step spi...

  • Article
  • Open Access
4 Citations
3,224 Views
10 Pages

19 June 2019

Topological insulators (TIs) have a bulk bandgap and gapless edge or surface states that host helically spin-polarized Dirac fermions. Theoretically, it has been predicted that gapless states could also be formed along dislocations in TIs. Recently,...

  • Article
  • Open Access
4 Citations
4,149 Views
8 Pages

19 June 2019

In this work, the resistive switching characteristics of resistive random access memories (RRAMs) containing Sm2O3 and V2O5 films were investigated. All the RRAM structures made in this work showed stable resistive switching behavior. The High-Resist...

  • Article
  • Open Access
2 Citations
4,882 Views
9 Pages

Liquid Crystal Based Head-Up Display with Electrically Controlled Contrast Ratio

  • Yueda Liu,
  • Yan Li,
  • Quanming Chen,
  • Sida Li and
  • Yikai Su

18 June 2019

With the growing demand for driving safety and convenience, Head-Up Displays (HUDs) have gained more and more interest in recent years. In this paper, we propose a HUD system with the ability to adjust the relative brightness of ambient light and vir...

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Crystals - ISSN 2073-4352