Photoluminescence engineering with nanoantenna phosphors

Murai, Shinji; Zhang, Feifei; Aichi, Koki; Tanaka, Katsuhisa

doi:10.1039/d2tc03076d

Cited by 6 publications

(4 citation statements)

References 43 publications

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“…Even today's cell phones operate using very compact dipolar antennas. There is currently intensive work going on to design and construct nanoscopic dipole antennas for visible light [26]. Given this sustained background of successes of the antenna model, it is difficult to assume that nature suddenly has switched to a "black box" model for atomic emission as the "Wave Function Collapse" (WFC), as is accepted by the prevailing dominant interpretation of QM.…”

Section: Defining the "Photon" As An Exponential Pulsementioning

confidence: 99%

Resolving wave-particle duality could accelerate the mass production of quantum computers

Roychoudhuri,

Prasad

2024

Quantum Computing, Communication, and Simulation IV

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Quantum computers, hypothesized in 1980s, use concepts of superposition and entanglement phenomena. Although theoretical propositions and associated search algorithms for accurate measurements are being generated, the development of practical quantum computers themselves are advancing very slowly requiring enormous time and investments. The underlying concepts of a quantum computer are not new to the optical domain. However, the crucial enabling concepts of Entanglement and Superposition Principle are remaining clouded under the unresolved postulates, Wave-Particle Duality (WPD), and Wave Packet Reduction (WPR), implicating incompleteness in the interpretations of the mathematical formalism behind Quantum Mechanics. The WPD debate started during late1600 between Newton and Huygens. Young's resolution of WPD through his double-slit experiment in 1802 was effectively overturned by Einstein's interpretation of photoelectric effect as due to "indivisible light quanta". However, Einstein disowned his "light quanta" postulate shortly before his death in1955, even though it had earned him the Nobel Prize. We resolve WPD by synthesizing Newton's and Maxwell's concepts and assume atoms do emit quanta but propagate as time-finite exponential pulses. This assumption also resolves WPR for light-matter interaction with the assumption that Schrodinger's ψ represents atom's internal dipolar amplitude stimulations. This over-turns Born's interpretation that ψ only represents the abstract mathematical probability amplitude, rather than the physical "internal amplitude stimulation" of the quantum entity. However, our concept of atomic pulse emission forces us to re-derive the expression for the N-slit grating-spectrometer response since the classical derivation uses CW light, which does not exist. This pulsespectrometric response function strengthens our postulate since the grating response to the exponential pulse appears to be the convolution of a Lorentzian spectrum with the classical CW response function of the grating. The Fourier Transform of an exponential function is Lorentzian and QM predicts spontaneous emission line width to be Lorentzian. Then, conceptually one can extend the grating-expression (with N=2) to get the double-slit pattern. This approach preserves the classical causality that each of the two slits, like the N-signals out of a grating, are physically real and jointly stimulate the quantum detector array at the far field to generate the "Local" cosine fringes. The detector array executes the square modulus operation on its imposed dipolar amplitude stimulation and absorbs the necessary energy to fill up their quantum cups. Hence the double-slit pattern must also be "Local", just as the N-slit grating spectrum is generated locally at the exit spectral-plane of the spectrometer. This removes the need to believe that "single photons" mysteriously generate the double slit pattern.

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Section: Defining the "Photon" As An Exponential Pulsementioning

confidence: 99%

Resolving wave-particle duality could accelerate the mass production of quantum computers

Roychoudhuri,

Prasad

2024

Quantum Computing, Communication, and Simulation IV

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“…50 While the geometry of UiO-66 is intrinsically conducive to water confinement, functionalising it with -NH 2 groups intensifies the confinement effect not only due to geometry but also due to increased guest-host interactions. 51 For UiO-66Br, the decrease in ξ 2 is due the steric hindrance caused by the -Br group. As discussed earlier, the introduction of -Br would hinder the pore access.…”

Section: Physical Chemistry Chemical Physics Accepted Manuscriptmentioning

confidence: 99%

Exploring the effect of molecular size and framework functionalisation on transport in metal–organic frameworks using pulsed-field gradient nuclear magnetic resonance

Zainal,

Alsudani,

Adams

et al. 2024

Phys. Chem. Chem. Phys.

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“…In this regard, only a few examples of patterning employing a different material over a scatter-free phosphor plate have been reported. [43][44][45] With this challenge in mind, we attempted and demonstrated the first example of a monolithically patterned phosphor thin film using square arrays of nanoholes with different lattice parameters to achieve directional enhancement of RE emission. [46] However, full exploitation of this concept requires the development of phosphor-based inks that can be further processed to integrate photonic properties in well-defined predesigned surface motifs, which would greatly improve their adaptability to a specific application and enhance the desired uniqueness of the optical response, reducing the chances of being imitated or replicated.…”

Section: Introductionmentioning

confidence: 99%

Inkjet‐Printed and Nanopatterned Photonic Phosphor Motifs with Strongly Polarized and Directional Light‐Emission

Cabello‐Olmo,

Romero,

Kainz

et al. 2023

Adv Funct Materials

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Herein a versatile and scalable method to prepare periodically corrugated nanophosphor surface patterns displaying strongly polarized and directional visible light emission is demonstrated. A combination of inkjet printing and soft lithography techniques is employed to obtain arbitrarily shaped light emitting motifs. Such predesigned luminescent drawings, in which the polarization and angular properties of the emitted light are determined and finely tuned through the surface relief, can be used as anti‐counterfeiting labels, as these two specific optical features provide additional means to identify any unauthorized or forged copy of the protected item. The potential of this approach is exemplified by processing a self‐standing photoluminescent quick response code whose emission is both polarized and directionally beamed. Physical insight of the mechanism behind the directional out‐coupled photoluminescence observed is provided by finite‐difference time‐domain calculations.

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Photoluminescence engineering with nanoantenna phosphors

Abstract: The total radiation pattern is evaluated for nanoantenna phosphors comprising a periodic array of TiO2 particles on the phosphor plate. The antenna redistributes the spatial radiation pattern while the total emission intensity remains unchanged.

Cited by 6 publications

References 43 publications

Resolving wave-particle duality could accelerate the mass production of quantum computers

Resolving wave-particle duality could accelerate the mass production of quantum computers

Exploring the effect of molecular size and framework functionalisation on transport in metal–organic frameworks using pulsed-field gradient nuclear magnetic resonance

Inkjet‐Printed and Nanopatterned Photonic Phosphor Motifs with Strongly Polarized and Directional Light‐Emission

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