High contrast grating

Author: esuy

August undefined, 2024

WebHá 1 hora · Background The differentiation of minimal-fat—or low-fat—angiomyolipomas from other renal lesions is clinically challenging in conventional computed tomography. In this work, we have assessed the potential of grating-based x-ray phase-contrast computed tomography (GBPC-CT) for visualization and quantitative differentiation of minimal-fat … WebPerson as author : Pontier, L. In : Methodology of plant eco-physiology: proceedings of the Montpellier Symposium, p. 77-82, illus. Language : French Year of publication : 1965. book part. METHODOLOGY OF PLANT ECO-PHYSIOLOGY Proceedings of the Montpellier Symposium Edited by F. E. ECKARDT MÉTHODOLOGIE DE L'ÉCO- PHYSIOLOGIE …

High-Contrast Gratings based Spoof Surface Plasmons

Web1 de out. de 2024 · In this work, we propose a high-contrast-gratings-like absorber to achieve ultra-high absorption based on a thin Germanium layer. High absorption approximately 95% at wavelength 1310 nm is... Web2 de jun. de 2024 · We present the first experimental demonstration of a planar focusing monolithic subwavelength grating mirror. The grating is formed on the surface of GaAs … csir project associate

High-contrast gratings as a new platform for integrated …

Web26 de out. de 2024 · Download figure: Standard image High-resolution image Instead of this conventional 'membrane in the middle' approach, the modulator device could be incorporated into one of the mirrors of the Fabry–Perot cavity by designing high contrast gratings (HCGs), as illustrated in figure 1(b). Conventional high-reflectivity mirrors are … Web21 de set. de 2015 · Optical properties of two-dimensional (2D) high-contrast gratings are investigated. We analyze the mechanisms for high-contrast gratings to function as … Web20 de set. de 2024 · Absorbers such as photonic crystals, metasurfaces, and nanowires have been demonstrated to have important applications in solar cells, detectors, etc. The application of thin-layer-based absorbers to photodetectors is beneficial to simultaneously improve responsivity and 3 dB bandwidth. In this work, we propose a high-contrast … csir previous papers

Monolithic high-contrast grating based polariton laser

Quasi-BIC laser enabled by high-contrast grating resonator for gas ...

Web24 de ago. de 2015 · Measured optical reflectivity spectra of the fabricated high contrast gratings show very good agreement with simulations, with a high reflectivity of >95% over a 25 nm wavelength span centered around 435 nm for the transverse-magnetic polarization. I. INTRODUCTION 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 … csir physical address pretoriaWebcreation of coupled cavity systems.7 However, HCGs make use of high-index-contrast to achieve high re ectance; they are often surrounded by air and require relatively complex fabrication processes to remove the sacri cial layer under the HCG layer.1 Suspended, they are susceptible to vibrational instability,8 ine cient in heat dissipation, and ... csir raman research fellowship

"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: … " - High contrast grating

High contrast grating

Web5 de mai. de 2009 · High-Contrast Grating VCSELs. Abstract: Recent advances in a single-layer 1-D high-index-contrast subwavelength grating structure are reviewed. Its … Web25 de jan. de 2024 · We propose a heat-reconfigurable metasurface composed of the silicon-based gold grating. The asymmetric Fano-like line shape is formed due to the mutual coupling of the local surface plasmon (LSP) in the gap between the two layers of Au gratings and the surface propagating plasmon (SPP) on the surface of the Au gratings. Then, we …

Did you know?

Web12 de jan. de 2024 · Here, we create on-chip waveguides from pairs of high-index-contrast silicon gratings for lateral confinement by reflection at grazing incidence and a thin … Web29 de ago. de 2024 · The high index contrast subwavelength grating has a large reflection bandwidth up to 97 nm with good polarization selectivity, and exhibits large tolerance in preparation, which makes it easier to integrate with the VCSEL. What’s more, its sensitivity to angle of incidences facilitates the single-mode VCSELs’ implement.

Web13 de jun. de 2024 · Our high-contrast gratings (HCGs) achieve color tunability by changing the wavelength-dependent birefringence via electrodeposited Cu inside the … WebWikipedia

Web12 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 … Web22 de fev. de 2008 · We report the experimental demonstration of a large fabrication tolerance for a single-layer, highly reflective high-index-contrast subwavelength grating …

Web9 de ago. de 2024 · Very recently, high-contrast grating (HCG) based biosensor with extremely simple excitation system, high sensitivity, and rapid response time have been …

Web2 de jun. de 2024 · Experimental Demonstration of Light Focusing Enabled by Monolithic High-Contrast Grating Mirrors Experimental Demonstration of Light Focusing Enabled by Monolithic High-Contrast Grating Mirrors ACS Appl Mater Interfaces. 2024 Jun 2;13 (21):25533-25539. doi: 10.1021/acsami.1c04871. Epub 2024 May 19. Authors csir project associate jobWeb1 de jan. de 2024 · A high-precision microdisplacement sensor based on zeroth-order diffraction of a single-layer optical grating is reported. Laser grating interference occurs when part of the laser is reflected diffraction by the grating and another part is vertically reflected back by a mirror and diffracted again by the grating, thus generating optical … eagle globe anchorWebto choose an appropriate waveguide thickness h of for example 220nm. This high efﬁciency grating coupler type is theoretically described in [10] and shows around 80% of coupling ef-ﬁciency according to simulations. Although it requires more process steps than the previous cases, it is compatible with any high index contrast photonic platform. eagle globe anchor clipartWeb11 de nov. de 2010 · High contrast gratings for integrated optoelectronics. Abstract: We discuss a new concept of dielectric subwavelength grating leveraging high index contrast … eagle globe anchor barbershopWeb1 de set. de 2024 · Broadband reflecting mirrors with high reflectivity are crucial for constructing a VCSEL cavity with a high Q factor. High-contrast grating (HCG) made of two materials with high contrast index exhibits broadband with high reflectivity by proper design of the geometrical parameters such as the grating period, the grating thickness … csir raman fellowshipWeb12 de nov. de 2015 · First, the high-contrast grating and complicated structure were applied in reference 14. While in this paper, the low-contrast grating and simple structure are used to cancel the 0th order. csir ranking in indiaWeb9 de mai. de 2008 · Abstract: 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-signal pulsed operation. csir recruitment 2022 notification