This case report details a rare presentation of unicentric Castleman disease (UCD), hyaline vascular type in a 22-year-old woman. The patient presented with a large, well-circumscribed mass in the paravertebral region causing back pain and shortness of breath. Diagnostic imaging and biopsy confirmed the diagnosis, and surgical excision led to a favorable outcome.
View Article and Find Full Text PDFThe mode multiplexing/de-multiplexing devices are key components for mode-division multiplexing (MDM) technology. Here, we propose an ultra-compact and reconfigurable mode-conversion device via inverse design, which can selectively implement multichannel mode conversion controlled by input phase shifts (Δφ). The device can transform input TE (TE) mode to TE (TE) mode at Δφ=0, or from TE (TE) to TE (TE) at Δφ=π spanning the wavelength range of 1525-1565 nm.
View Article and Find Full Text PDFJ Phys Condens Matter
November 2017
Quantum simulation is a promising approach to understanding complex strongly correlated many-body systems using relatively simple and tractable systems. Photon-based quantum simulators have great advantages due to the possibility of direct measurements of multi-particle correlations and ease of simulating non-equilibrium physics. However, interparticle interaction in existing photonic systems is often too weak, limiting the potential for quantum simulation.
View Article and Find Full Text PDFA simple core-shell two-dimensional photonic crystal is studied where the triangular lattice symmetry and the C point group symmetry give rich physics in accidental touching points of photonic bands. We systematically evaluate different types of accidental nodal points at the Brillouin zone center for transverse-magnetic harmonic modes when the geometry and permittivity of the core-shell material are continuously tuned. The accidental nodal points can have different dispersions and topological properties (i.
View Article and Find Full Text PDFWe propose a design for broadband waveguide mode conversion based on gradient index metamaterials (GIMs). Numerical simulations demonstrate that the zeroth order of transverse magnetic mode or the first order of transverse electric mode (TM0/TE1) can be converted into the first order of transverse magnetic mode or the second order of transverse electric mode (TM1/TE2) for a broadband of frequencies. As an application, an asymmetric propagation is achieved by integrating zero index metamaterials inside the GIM waveguide.
View Article and Find Full Text PDFWe propose a method to control electromagnetic flux in an almost arbitrary way in wavelength and subwavelength scales. The capability of subwavelength flux control is enabled by the evanescent waves induced in a class of inhomogeneous anisotropic media with a near-zero permittivity component. By designing the spatial profile of the other permittivity component in such inhomogeneous media, the flow and distribution of energy flux can be conveniently manipulated.
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