3,273 research outputs found
SIMULATING IMPACT OF PECAN STORAGE TECHNOLOGY ON FARM PRICE AND GROWERSÂ’ INCOME
Pecan growers can increase income by storing pecans if economically feasible storage technology is available. The marginal conditions under which growers would store pecans were derived. Revenue changes due to storage and impact of storage on price variations were simulated, suggesting the price that growers could pay for new storage technology.Demand and Price Analysis,
The Renaissance of Black Phosphorus
One hundred years after its first successful synthesis in the bulk form in
1914, black phosphorus (black P) was recently rediscovered from the perspective
of a two-dimensional (2D) layered material, attracting tremendous interest from
condensed matter physicists, chemists, semiconductor device engineers and
material scientists. Similar to graphite and transition metal dichalcogenides
(TMDs), black P has a layered structure but with a unique puckered single layer
geometry. Because the direct electronic band gap of thin film black P can be
varied from 0.3 to around 2 eV, depending on its film thickness, and because of
its high carrier mobility and anisotropic in-plane properties, black P is
promising for novel applications in nanoelectronics and nanophotonics different
from graphene and TMDs. Black P as a nanomaterial has already attracted much
attention from researchers within the past year. Here, we offer our opinions on
this emerging material with the goal of motivating and inspiring fellow
researchers in the 2D materials community and the broad readership of PNAS to
discuss and contribute to this exciting new field. We also give our
perspectives on future 2D and thin film black P research directions, aiming to
assist researchers coming from a variety of disciplines who are desirous of
working in this exciting research field.Comment: 23 pages, 6 figures, perspective article, appeared online in PNA
Broadband opto-mechanical phase shifter for photonic integrated circuits
A broadband opto-mechanical phase shifter for photonic integrated circuits is
proposed and numerically investigated. The structure consists of a
mode-carrying waveguide and a deformable non-mode-carrying nanostring, which
are parallel with each other. Utilizing the optical gradient force between
them, the nanostring can be deflected. Thus the effective refractive indices of
the waveguide is changed with the deformation, and further causes a phase
shift. The phase shift under different geometry sizes, launched powers and
boundary conditions are calculated and the dynamical properties as well as the
thermal noise's effect are also discussed. It is demonstrated that a
phase shift can be realized with only about 0.64 mW launched power and 50 long nanostring. The proposed phase shifter may find potential usage in
future investigation of photonic integrated circuits
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