Interactions of low-power photons with natural opals—PBG materials, photonic control, natural metamaterials, spontaneous laser emissions, and band-gap boundary responses

Stem, Michelle R.

doi:10.1016/j.mseb.2012.03.031

Cited by 3 publications

(18 citation statements)

References 14 publications

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“…To maximize reproducibility, this research kept each specimen at maximum hydration [1,4] prior to conducting each step in analysis. Changes in internal hydration levels could have affected the measured and computed values [36,37].…”

Section: Methodsmentioning

confidence: 99%

“…Since this research focused on photonic interactions and control, each phase of the present research was considered to be photonically and electronically sensitive [1,4]. Hence, extraneous photons and electrons in the laboratory were severely minimized to maximize the reliability/repeatability of observations and enhance the detection of properties which may be sensitive to, or affected by, stray photons.…”

Section: Methodsmentioning

confidence: 99%

“…In addition to ambient light control, steps were taken to ensure that experiment observations were limited to responses due to the internal properties of the specimens and not due to other surfaces, reflections or some other exogenous source [1,4]. Hence, for macroscopic observations, each specimen was examined while held aloft in an articulating, photonically unresponsive holder at approximately 35 mm above a photonically unresponsive surface of neutral light beige color.…”

Section: Methodsmentioning

confidence: 99%

“…Natural precious opals are comprised, mostly, of nano-sized silicate spheres and adsorbed H 2 O. A silicate matrix (SiO 2 :H 2 O) has variably sized spheres with no play-of-color [1]. In this matrix are embedded pseudo-crystalline zones (PCZs) with uniformly sized, highly ordered spheres of variable overall dimensions [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Each PCZ diffracts incident light independently of the other PCZs, causing opal’s iconic play-of-color. Precious opal is like an amorphous sea of non-uniform hydrated silicate nano-spheres, embedded with islands of PCZs [1,3–6].…”

Section: Introductionmentioning

confidence: 99%

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Coherent poly propagation materials with 3-dimensional photonic control over visible light

Stem

2019

PLoS ONE

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The purpose of the present research was to identify and examine materials demonstrating a previously undiscovered property of coherent poly propagation (CPP). The materials were amorphous silicates as natural precious opals. CPP enabled three-dimensional photonic control over mono and polychromatic visible light wavelengths. CPP caused coherent diffraction of incident poly and monochromatic light. Apart from the iconic play-of-color of precious opal, CPP specimens demonstrated diffractive photonic demultiplexing and/or upconversion and/or downconversion of incident light with strong photonic coherence such that the shape of the incident light source was propagated over three dimensions over multiple visible frequencies. CPP events manifested as each specimen was rocked under the incident light. Additionally, the specimens demonstrated atypical control over internally reflected and transmitted light. The specimens applied axial rotational symmetry over the incident light. Amorphous materials would be expected to exert no symmetry control. CPP and rotational properties occurred in isolation from exogenous thermal, photonic and electrical influences. Furthermore, several non-destructive analytical instruments were employed, such as: spectrophotometer, polariscope and refractometer. The analytical methods revealed unusual behaviors of these specimens. The application of materials demonstrating three-dimensional photonic control will have far-reaching implications for many industries, including: photonic wavelength demultiplexing, fiber optics, imaging, microscopy, projections, security, cryptography, computers and communications.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%