High-contrast grating
Web2 de ago. de 2010 · The phenomenon of ultra high reflectivity is explained to be a destructive interference effect between the two grating modes. Based on this phenomenon, a design algorithm for broadban … Theoretical analysis of subwavelength high contrast grating reflectors Opt Express. 2010 Aug 2;18(16):16973-88. doi: … Web4 de fev. de 2024 · A novel optical antenna for optical phased arrays is proposed and simulated. A high-contrast grating structure is used to achieve extremely efficient emission. The emission efficiency is as high as 93.94% at 1.55 μm, which exceeds 50% in a range of wavelength from 1.48 μm to 1.62 μm. The antenna can …
High-contrast grating
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Web12 de jan. de 2024 · These high-contrast gratings (HCGs) with a period smaller than the optical wavelength harness a special reflection mechanism 30,31 based on the … WebThis paper investigates the optical bound states in the continuum (BIC) supported by a slotted high-contrast grating (sHCG) structure. The sHCG structure consists of a periodic array of silicon ridges with a slot in each ridge. Given that the BICs are perfectly confined, their spectral locations are identified using a finite-element method formulated from a …
Web24 de ago. de 2015 · In this work, the authors describe a novel route to achieve a high reflectivity, wide bandwidth feedback mirror for GaN-based vertical-cavity light emitters; using air-suspended high contrast gratings in TiO 2, with SiO 2 as a sacrificial layer. The TiO 2 film deposition and the etching processes are developed to yield grating bars … Web17 de nov. de 2014 · A full-color reflective display system with potentially unprecedented performances on brightness, color saturation, and contrast ratio is proposed. A three-layer architecture is employed to achieve maximum brightness, wherein the key components of every layer are reflective color filters based on high-contrast gratings that are designed …
Web26 de mar. de 2024 · Recent progress of vertical-cavity surface-emitting lasers (VCSELs) using high contrast grating (HCG) and their applications will be reviewed. Replacing distributed Bragg reflectors (DBR) with a ultra-thin high contrast grating enables wavelength swept and far field pattern engineering. We will discuss review the basic …
WebThe device consists of a thin gain layer (Rhodamine 6G dye-doped silica) sandwiched between two high-contrast-grating layers. The structure supports various BIC modes …
Web4 de mai. de 2008 · Polarization mode control in high contrast subwavelength grating VCSEL. We experimentally demonstrate deterministic polarization mode control in VCSEL utilizing a single-layer high-index-contrast subwavelength grating mirror. Orthogonal polarization suppression ratio of 36 and 28 dB was obtained under both CW and large … graph plotter with stepsWebThe improvements due to small incision lenticule extraction (SMILE) in vision, e.g., in spherical equivalent (SE) and visual acuity (VA), has been widely recognized. However, the contrast sensitivity (CS) change after SMILE was not certain. Here, we investigated the effect of SMILE on CS before, 1 day after and 7 days after surgery and then clarified the … graph plotter x and y and z axis onlineWeb12 de fev. de 2013 · We show that, despite broadened by the Brownian motion, the HCG-VCSEL has a total linewidth of 60 MHz or a coherent length of 5 m in air, and an intrinsic … graph plotting appWeb2 de ago. de 2010 · A simple analytic analysis of the ultra-high reflectivity feature of subwavelength dielectric gratings is developed. The phenomenon of ultra high reflectivity … graph plotting in c++Web21 de set. de 2024 · Ultra-Compact Organic Vertical-Cavity Laser With High-Contrast Grating Feedback for Gas Detection Abstract: The miniaturization of optical sensors is a … graph plotting in matlab from equationWeb12 de fev. de 2013 · Recent advances in high-contrast grating (HCG) vertical-cavity surface-emitting lasers (VCSEL) emitting at 1550 nm is reported in this paper. The novel near-wavelength HCG has an ultrathin structure and broadband reflectivity. It enables a monolithic, simple fabrication process for realizing InP-based VCSELs emitting at ∼1550 … chissomoWeb21 de set. de 2015 · We analyze the mechanisms for high-contrast gratings to function as various high-performance optical components. Our top-down design procedure allows us … graph plotting excel