59 citations · 78 across the 15 of their papers we have counts for
17 papers
Charged Three-Dimensional Solitons in a Ferroelectric Nematic Liquid Crystal
Netra Prasad Dhakal, Zakaria Siddiquee, Hiroya Nishikawa +4
Experimental observations and computer simulation of formation and structural properties of so far experimentally never seen electrically charged propagating 3D solitons are report…
Shear-mode Direct Piezoelectric Response of Ferroelectric Nematic Liquid Crystals
Péter Salamon, Marcell Tibor Máthé, Hiroya Nishikawa +2
Piezoelectricity (linear coupling between mechanical deformation and electric signal) was originally observed only in solid crystals. Recently, it was discovered that liquid ferroe…
Direct measurement of osmotic pressure and interparticle interactions in colloidal dispersions
Keita Saito, Fumito Araoka
Colloidal dispersions are widely found in systems ranging from natural environments to industrial materials. Their macroscopic properties such as viscosity and light scattering dep…
Electrically Tunable Heliconical Smectic Superstructure in Polar Fluids
Hiroya Nishikawa, Dennis Kwaria, Atsuko Nihonyanagi +3
The ferroelectric nematic (NF) phase and related polar liquid-crystalline phases form a new class of strongly polarized yet fluid soft matter. Well-recognized heliconical ferroelec…
Three-Dimensional Hieratical Twists in Polar Fluids: Chirality Regulation by Ultra-Low Electric Field
Hiroya Nishikawa, Dennis Kwaria, Atsuko Nihonyanagi +1
Recently discovered helical polar fluid adopts a spontaneous chiral symmetry breaking (CSB) driven by polarization escape and conformational chirality. Ferroelectric nematic and sm…
Spontaneous Twist of Ferroelectric Smectic Blocks in Polar Fluids
Hiroya Nishikawa, Yasushi Okumura, Dennis Kwaria +2
In soft matter, the polar orientational order of molecules can facilitate the coexistence of structural chirality and ferroelectricity. The ferroelectric nematic (NF) state, exhibi…
Giant Electro-Viscous Effects in Polar Fluids with Paraelectric-Modulated Antiferroelectric-Ferroelectric Phase Sequence
Hiroya Nishikawa, Péter Salamon, Marcell Tibor Máthé +2
The recently discovered ferroelectric nematic liquid-crystal material DIO exhibits an antiferroelectric (AF) phase, characterized by a sinusoidally modulated structure between the…
Tunable Intracavity Coherent Up-conversion with Giant Nonlinearity in a Polar Fluidic Medium
Daichi Okada, Hiroya Nishikawa, Fumito Araoka
We demonstrate a novel microcavity-based photon up-conversion using second harmonic generation (SHG) from a polar nematic fluid media doped with a laser dye. The present idea is ba…
Emergent Ferroelectric Nematic and Heliconical Ferroelectric Nematic States in an Achiral "Straight" Polar Rod Mesogen
Hiroya Nishikawa, Daichi Okada, Dennis Kwaria +4
Ferroelectric nematic liquid crystals (NFLCs) are distinguished by their remarkable polarization characteristics and diverse physical phenomena, sparking significant interest and e…
Significant impact of light-matter strong coupling on chiral nonlinear optical effect
Daichi Okada, Fumito Araoka
Light-matter strong coupling (LMSC) is intriguing state in which light and matter are coherently hybridized inside cavity. It has been gaining widespread recognition as an excellen…
Magneto-chiral nonlinear optical effect with large anisotropic response in two-dimensional halide perovskite
Daichi Okada, Fumito Araoka
The chiral organic-inorganic halide perovskites (OIHPs) are vital candidates for superior nonlinear optical (NLO) effects associated with circularly polarized (CP) light. NLO in ch…
Transformation of polar nematic phases in the presence of electric field
A. V. Emelyanenko, V. Yu. Rudyak, F. Araoka +2
Only a few years have passed since discovery of polar nematics, and now they are becoming the most actively studied liquid crystal materials. Despite numerous breakthrough findings…
Nanostructural polymorphism in the low-birefringence chiral phase of an achiral bent-shaped dimer
Khoa V. Le, Michael R. Tuchband, Hiroshi Iwayama +3
Polymorphism, the phenomenon that a species can exist in many discrete forms, is common in nature, such as hair colors in an animal species, flower colors in a tree species, and bl…
Nano-Clustering Mediates Phase Transitions in a Diastereomerically-Stabilized Ferroelectric Nematic System
Hiroya Nishikawa, Koki Sano, Saburo Kurihara +4
During the last half-decade, a new class of ferroic-fluid, ferroelectric nematic liquid crystals (NFLCs), creates a noise owing to its exceptional properties such as a colossal pol…
Current-in-plane magnetoresistance in chiral-molecule/ferromagnetic metal bilayer due to thermally induced spin polarization
Kouta Kondou, Masanobu Shiga, Shoya Sakamoto +7
We report chirality-induced current-in-plane magnetoresistance (CIP-MR) in chiral molecule/ferromagnetic metal bilayer at room temperature. The previously reported chiralityinduced…
Chirality-induced effective magnetic field in a phthalocyanine molecule
Shinji Miwa, Kouta Kondou, Shoya Sakamoto +4
Chirality in organic molecules has attracted considerable attention in the fields of chemistry, biology, and spintronics. This paper reports on perpendicular magnetization hysteres…
Kinetics of motile solitons in fluid nematics
Satoshi Aya, Fumito Araoka
Solitary waves, dubbed "solitons", are special types of waves that propagate for an infinite distance under ideal conditions. These waves are ubiquitously found in nature such as t…