Electrically and thermally controllable nanoparticle random laser in a well-aligned dye-doped liquid crystal cell

Lee, Chia Rong; Lin, Sheng Huang; Guo, Jin; Lin, James T.; Lin, Hong; Zheng, Yang; Lien, Chia; Horng, Chi Ting; Sun, Han; Huang, Shuan Yu

doi:10.1364/ome.5.001469

Cited by 35 publications

(20 citation statements)

References 27 publications

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“…In addition, the hypothesis that fractal order exists at the molecular scale and can lead to quantum coherence at the nm scale is supported by Quochi et al [53,54], where CRL was reported in organic nano-fibres. At another level, we note that CRL has been reported in inhomogeneous nano-fibre suspensions [55], this contrasts with ordered systems in the same work, where CRL disappeared, suggesting that a continuous structure from molecular to nm scales is not essential for macroscopic coherence.…”

Section: Resultscontrasting

confidence: 54%

The physical principles underpinning self-organization in plants

Turner

Nottale

2017

Progress in Biophysics and Molecular Biology

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Based on laboratory based growth of plant-like structures from inorganic materials, we present new theory for the emergence of plant structure at a range of scales dictated by levels of ionization, which can be traced directly back to proteins transcribed from genetic code and their interaction with external sources of charge in real plants. Beyond a critical percolation threshold, individual charge induced quantum potentials merge to form a complex, interconnected geometric web, creating macroscopic quantum potentials, which lead to the emergence of macroscopic quantum processes. The assembly of molecules into larger, ordered structures operates within these charge-induced coherent bosonic fields, acting as a structuring force in competition with exterior potentials. Within these processes many of the phenomena associated with standard quantum theory are recovered, including quantization, non-dissipation, self-organization, confinement, structuration conditioned by the environment, environmental fluctuations leading to macroscopic quantum decoherence and evolutionary time described by a time dependent Schrödinger-like equation, which describes models of bifurcation and duplication. The work provides a strong case for the existence of quintessence-like behaviour, with macroscopic quantum potentials and associated forces having their equivalence in standard quantum mechanics. The theory offers new insight into evolutionary processes in structural biology, with selection at any point in time, being made from a wide range of spontaneously emerging potential structures (dependent on conditions), which offer advantage for a specific organism. This is valid for both the emergence of structures from a prebiotic medium and the wide range of different plant structures we see today.

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Section: Resultscontrasting

confidence: 54%

The physical principles underpinning self-organization in plants

Turner

Nottale

2017

Progress in Biophysics and Molecular Biology

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“…The optical excitation and emission of these nanomaterials could be tuned effectively through the interaction between nanomaterials and the long-range ordered LC molecules, leading to a series of potential applications such as information storage, displays, LC lasers, etc. [130][131][132][133][134].…”

Section: Introductionmentioning

confidence: 99%

Perspectives in Liquid-Crystal-Aided Nanotechnology and Nanoscience

2019

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The research field of liquid crystals and their applications is recently changing from being largely focused on display applications and optical shutter elements in various fields, to quite novel and diverse applications in the area of nanotechnology and nanoscience. Functional nanoparticles have recently been used to a significant extent to modify the physical properties of liquid crystals by the addition of ferroelectric and magnetic particles of different shapes, such as arbitrary and spherical, rods, wires and discs. Also, particles influencing optical properties are increasingly popular, such as quantum dots, plasmonic, semiconductors and metamaterials. The self-organization of liquid crystals is exploited to order templates and orient nanoparticles. Similarly, nanoparticles such as rods, nanotubes and graphene oxide are shown to form lyotropic liquid crystal phases in the presence of isotropic host solvents. These effects lead to a wealth of novel applications, many of which will be reviewed in this publication. the observation of chirality from achiral molecules, resulting from sterically induced packing of the bent-core mesogens [10], such as ferroelectricity or the formation of helical superstructures in the B7 phase [14]. Thermotropic LCs are commonly constituted by single organic entities or mixtures thereof, which exhibit various mesophases at different temperatures or pressures [15], illustrated in Figure 1b. As the temperature rises, a typical thermotropic LC passes through higher ordered phases, also called soft crystals, the hexatic smectic phases with positional order as well as bond orientational order, through the fluid smectic phases (SmC and SmA), which exhibit both positional and orientational order, and finally to the nematic phase (N) with purely orientational order, into the isotropic phase. The number of different phases observed depends on the chemical composition, symmetry and order of the LC molecules. About 25 different thermotropic phases are known to date, and they are still increasing in number. Appl. Sci. 2019, 9, x FOR PEER REVIEW 2 of 47 unique effects of the observation of chirality from achiral molecules, resulting from sterically induced packing of the bent-core mesogens [10], such as ferroelectricity or the formation of helical superstructures in the B7 phase [14]. Thermotropic LCs are commonly constituted by single organic entities or mixtures thereof, which exhibit various mesophases at different temperatures or pressures [15], illustrated in Figure 1b. As the temperature rises, a typical thermotropic LC passes through higher ordered phases, also called soft crystals, the hexatic smectic phases with positional order as well as bond orientational order, through the fluid smectic phases (SmC and SmA), which exhibit both positional and orientational order, and finally to the nematic phase (N) with purely orientational order, into the isotropic phase. The number of different phases observed depends on the chemical composition, symmetry and order of the LC molecules. About...

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“…Here, the transport mean free path (L) of the fluorescence photons in the scattering of the glycerol/CLC system was measured to identify the formation mechanism of the random lasing. The L is calculated by L ≈ λ∕π θ, where λ is wavelength and θ is the scattering cone [17]. In our experiment, we have θ 279 mrad and λ 633 nm, thus L ≈ 0.36 μm.…”

Section: Methodsmentioning

confidence: 92%

“…In comparison with conventional diffusive materials, the LC is stimulus-responsive material under stimuli such as electric field, magnetic field, optical irradiation, or environmental temperature [13][14][15][16][17]. LC random lasers have been investigated extensively during the past decades [5,10,[16][17][18][19][20][21][22][23]. Liu et al reported gain narrowing and random lasing from dye-doped polymer dispersed liquid crystal (PDLC) with nanoscale liquid crystal droplets [10].…”

Section: Introductionmentioning

confidence: 99%

Random lasing from cholesteric liquid crystal microspheres dispersed in glycerol

Luo

Chen

2016

Appl. Opt.

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We demonstrate random lasing from a scattering system formed by a cholesteric liquid crystal dispersed in glycerol. Strong scattering of light is produced from the interference between the cholesteric liquid crystal microsphere and glycerol and leads to random lasing. The optical properties of random lasing, such as intensity, threshold, and the temperature effect on lasing emission are demonstrated. The random laser is distinguished from the band-edge laser generated within the cholesteric liquid crystal microspheres by analyzing the positions of the photonic band-edge of the cholesteric liquid crystal and the photoluminescence of the doped laser dye. The random laser from cholesteric liquid crystal microspheres in glycerol possesses a simple fabrication process, small volume, and low threshold, which enable it to be used in speckle-free imaging, target identification, biomedicine, document coding, and other photonic devices.

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Electrically and thermally controllable nanoparticle random laser in a well-aligned dye-doped liquid crystal cell

Cited by 35 publications

References 27 publications

The physical principles underpinning self-organization in plants

The physical principles underpinning self-organization in plants

Perspectives in Liquid-Crystal-Aided Nanotechnology and Nanoscience

Random lasing from cholesteric liquid crystal microspheres dispersed in glycerol

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