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Showing 1 to 14 of 14 for “"Reflection Spectra"”.
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Interaction of acoustic waves and anisotropic multilayered composite plates immersed in water.
… anisotropic composite plates is presented. Reflection and transmission coefficients as a function of the plane wave incident angle and ultrasonic wave frequency are computed for single layered and multilayered plates. From the minima of the reflection spectra one can obtain the Lamb wave …
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Optical properties of GaAs coupled quantum wells and superlattices: electric and magnetic field effects
… magnetic fields on the optical transmission and reflection spectra of GaAs/ AlGaAs coupled quantum wells and superlattices are investigated and their potential application in optical modulation demonstrated. Quenching and enhancement of excitonic absorption peaks is achieved at low bias fields of …
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Optical fibre surface plasmon resonance sensors based on a metallic array of sub-wavelength apertures
… the wavelength difference variations of spectral features and the light intensity from the reflection spectra of the OFS. The proposed sensor is compact in size and suitable for remote sensing. The sensor needs only a small volume of the liquid being tested and it is easy to use. It is …
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Cavity coupled photonic crystal enhanced fluorescence for high sensitivity biomarker detection
… are analyzed through simulated and experimental reflection spectra results to find that the enhanced excitation depends mainly on the quality factor of the guided mode resonator and the Fabry-Perot reflection dip envelope caused by constructive and destructive Fabry-Perot reflections. Enhanced …
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Investigation of selective optical properties of Si/SiO2 nanostructures generated by pulsed laser ablation as-deposited and post-treated
… thin films. Transmission and specular reflection measurements along with material characterization techniques, Raman, FTIR XPS, and XRD were employed for better interpretation of the results. Three studies are included in this research. First, exploration of the effect of manufacturing …
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Investigation of Bragg Gratings in Few-Mode Fibers with a Femtosecond Laser Point-by-Point Technique
… (TMF). Through measuring the transmission and reflection spectra along with the associated reflected mode intensity profiles under different input polarization, we experimentally investigate the off-axis TM-FBGs (FBGs in a TMF) with multiple characteristics reported for the first time to our …
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Vertical cavity surface emitting lasers.
… stacks through which current is injected. The reflection spectra of these stacks is studied in detail; the effects on the laser threshold gain of absorption due to impurities and of errors in growth are investigated. Methods of disruption of the AlAs / GaAs heterointerfaces have been used to …
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Point contact spectroscopy studies of the iron based superconductors
… apart from probing superconductors by Andreev reflection, PCS is also a useful technique to study exotic electron matter in correlated materials. The point contact junctions are made by two separate techniques: needle-anvil PCS and soft PCS. $dI/dV$ measured in the superconducting phase is …
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Probing the atmospheres of transiting exoplanets using ground-based multi-object spectroscopy
… I present an optical FORS2 reflection spectrum of the hot Jupiter WASP-43b. However, due to the limitations of systematic noise, I was only able to determine a conservative 3-𝜎 upper limit of 0.86 for the geometric albedo. This poorly constrained value highlights the …
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Manipulation of Light-Matter Interaction in Two-Dimensional Systems via Localized Surface Plasmons
… localized surface plasmon (LSP) resonances via reflection measurements and numerical simulations. Due to the grating created by arrays of bowties, a new, lattice-coupled LSP (lattice-LSP) mode emerged. Comparing the calculated E-field enhancement of the bowtie arrays to the reflection spectra …
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Optical property studies and metalorganic chemical vapor deposition of ferroelectric thin films
… band gap region, both the transmission and reflection spectra were used to successfully calculate the optical constants of the films. The film thickness derived from the envelope method was cross checked by a computer simulation method and was found to have an accuracy better than 2%. An …
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Hybrid nanolayer architectures for ultrafast acousto-plasmonics in soft matter
… longitudinal plasmon resonance in the transient reflection spectra is interpreted as the event of GNRs sensing the strain wave. We argue that the shift of the longitudinal plasmon resonance is caused by the viscoelastic deformation of the polymer around the nanoparticle. The deformation is …
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Enhanced Spontaneous Emission And Spectral Analysis Using Waveguide Based Devices.
<p>We will put abstract in here.</p>
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PHYSICAL APPROACHES TO IMPROVE THE QUALITY OF GLUTEN-FREE PASTA
… preliminary extrusion-cooking step. Based on K/S spectra (obtained after equilibration above K2SO4 and exposure to iodine vapor), Pasta A showed a behavior similar to RF. Process B promoted a greater iodine binding capacity related to a higher starch chain mobility. Moreover, the extrusion-cooking …