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Terahertz reflection behaviors of metallic-grating-dielectric-metal (MGDM) microcavity with a monolayer graphene embedded into the dielectric layer are theoretically investigated. A tunable wideband reflection dip at about the Fabry–Pérot resonant frequency of the structure is found. The reflectance at the dip frequency can be electrically tuned in the range of 96.5% and 8.8%. Because of the subwavelength distance between the metallic grating and the monolayer graphene, both of the evanescent grating slit waveguide modes and the evanescent Rayleigh modes play key roles in the strong absorption by the graphene layer. The dependence of reflection behaviors on the carrier scattering rate of graphene is analyzed. A prototype MGDM-graphene structure is fabricated to verify the theoretical analysis. Our investigations are helpful for the developments of electrically controlled terahertz modulators, switches, and reconfigurable antennas based on the MGDM-graphene structures.
Absorption-enhancementGrapheneIcrocavityBear-fieldTerahertzThe natural gas storage report from the EIA for the week ending April 2nd indicated that the amount of natural gas held in underground storage in the US rose by 20 billion cubic feet to 1,784 billion cubic feet by the end of the week, which left our gas supplies 235 billion cubic feet, or 11.6% below the 2,019 billion cubic feet that were in storage on April 2nd of last year, and 36 billion cubic feet, or 1.3% below the five-year average of 1,808 billion cubic feet of natural gas that have been in storage as of the 2nd of April in recent years..the 20 billion cubic feet that were added to US natural gas storage this week was less than the average forecast of a 27 billion cubic foot addition from an S&P Global Platts survey of analysts, and was also less than the 30 billion cubic feet added to natural gas storage during the corresponding week of a year earlier, but was well more than the average addition of 8 billion cubic feet of natural gas that have typically been injected into nat
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Girl’s tragic death in oil industry explosion haunts her family
Maxwell Smith filled with grief over his daughter s death. Credit: Julie Dermansky
Maxwell Smith is on a mission to make sure no one loses a child the way he lost his 14-year-old daughter, Zalee Gail Day-Smith. Zalee, a vivacious high school freshman who loved singing, died on February 28 when oil tanks exploded near her home in Beauregard, Louisiana. “Her body was thrown 200 feet in the air,” Smith told me when I went to visit the family a month after the accident. Zalee’s body was found across the street from the site of the blast in the Bear Field oil field, just north of Lake Charles. It was located alongside one of the oil tanks that had been blown off its foundation. Smith says that his daughter’s body was mutilated to such a degree that the family was never allowed to see it.
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