In-plane anisotropic Raman response of layered In2Te5 semiconductor

2021 ◽  
Vol 118 (18) ◽  
pp. 182105
Author(s):  
Yulan Zhou ◽  
Weike Wang ◽  
Liang Li ◽  
Penglai Gong ◽  
Dongsheng Tang
Keyword(s):  
Raman Response

Polarization-dependence of the Raman response of free-standing strained Ce0.8Gd0.2O2 membranes

2021 ◽  
Author(s):  
Alexander Konetschny ◽  
Marcel Weinhold ◽  
Christian Heiliger ◽  
Matthias Thomas Elm ◽  
Peter J. Klar
Keyword(s):  
Thin Films ◽  
Strain State ◽  
Polarization Dependence ◽  
Raman Mapping ◽  
Free Standing ◽  
Excitation Light ◽  
Oriented Polycrystalline ◽  
Raman Response

Square-shaped Ce0.8Gd0.2O2 (GDC) membranes are prepared by microstructuring techniques from (111)-oriented, polycrystalline GDC thin films. The strain state of the membranes is investigated by micro-Raman mapping using polarized excitation light....

Grain boundary effects on dielectric, infrared and Raman response of SrTiO3 nanograin ceramics

2006 ◽  
Vol 26 (14) ◽  
pp. 2855-2859 ◽  
Author(s):  
Jan Petzelt ◽  
Tetyana Ostapchuk ◽  
Ivan Gregora ◽  
Maxim Savinov ◽  
Dagmar Chvostova ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Effects ◽  
Grain Boundary Effects ◽  
Raman Response

scholarly journals Far infrared and Raman response in tetragonal PZT ceramic films

2015 ◽  
Vol 54 (6) ◽  
pp. 219-224 ◽  
Author(s):  
Elena Buixaderas ◽  
Christelle Kadlec ◽  
Premysl Vaněk ◽  
Silvo Drnovšek ◽  
Hana Uršič ◽  
...  
Keyword(s):  
Far Infrared ◽  
Ceramic Films ◽  
Raman Response ◽  
Pzt Ceramic

Evaluation of thin metal film thickness from light attenuation and multi-reflection effects on micro-Raman response

2013 ◽  
Vol 536 ◽  
pp. 142-146 ◽  
Author(s):  
C. Camerlingo ◽  
M.P. Lisitskiy ◽  
L. De Stefano ◽  
I. Rea ◽  
I. Delfino ◽  
...  
Keyword(s):  
Film Thickness ◽  
Metal Film ◽  
Light Attenuation ◽  
Thin Metal Film ◽  
Thin Metal ◽  
Raman Response

scholarly journals Development of Bio-Functionalized, Raman Responsive, and Potentially Excretable Gold Nanoclusters

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2181
Author(s):  
Ryan D. Mellor ◽  
Andreas G. Schätzlein ◽  
Ijeoma F. Uchegbu
Keyword(s):  
Particle Size ◽  
Gold Nanoparticles ◽  
Ethylene Glycol ◽  
Gold Nanoclusters ◽  
Physiological Conditions ◽  
Non Invasive ◽  
In Vivo Detection ◽  
Raman Response ◽  
Octadecyl Amine

Gold nanoparticles (AuNPs) are used experimentally for non-invasive in vivo Raman monitoring because they show a strong absorbance in the phototherapeutic window (650–850 nm), a feature that is accompanied by a particle size in excess of 100 nm. However, these AuNPs cannot be used clinically because they are likely to persist in mammalian systems and resist excretion. In this work, clustered ultrasmall (sub-5 nm) AuNP constructs for in vivo Raman diagnostic monitoring, which are also suitable for mammalian excretion, were synthesized and characterized. Sub-5 nm octadecyl amine (ODA)-coated AuNPs were clustered using a labile dithiol linker: ethylene glycol bis-mercaptoacetate (EGBMA). Upon clustering via a controlled reaction and finally coating with a polymeric amphiphile, a strong absorbance in the phototherapeutic window was demonstrated, thus showing the potential suitability of the construct for non-invasive in vivo detection and monitoring. The clusters, when labelled with a biphenyl-4-thiol (BPT) Raman tag, were shown to elicit a specific Raman response in plasma and to disaggregate back to sub-5 nm particles under physiological conditions (37 °C, 0.8 mM glutathione, pH 7.4). These data demonstrate the potential of these new AuNP clusters (Raman NanoTheranostics—RaNT) for in vivo applications while being in the excretable size window.

Dielectric, infrared, and Raman response of undopedSrTiO3ceramics: Evidence of polar grain boundaries

2001 ◽  
Vol 64 (18) ◽  
Author(s):  
J. Petzelt ◽  
T. Ostapchuk ◽  
I. Gregora ◽  
I. Rychetský ◽  
S. Hoffmann-Eifert ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Raman Response

scholarly journals Squeezing-enhanced Raman spectroscopy

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Yoad Michael ◽  
Leon Bello ◽  
Michael Rosenbluh ◽  
Avi Pe’er
Keyword(s):  
Raman Spectroscopy ◽  
Shot Noise ◽  
Raman Signal ◽  
Background Suppression ◽  
Destructive Interference ◽  
Parametric Amplifiers ◽  
Two Phase ◽  
Resonant Raman ◽  
Raman Response ◽  
Anti Stokes

Abstract The sensitivity of classical Raman spectroscopy methods, such as coherent anti-stokes Raman spectroscopy (CARS) or stimulated Raman spectroscopy (SRS), is ultimately limited by shot-noise from the stimulating fields. We present the complete theoretical analysis of a squeezing-enhanced version of Raman spectroscopy that overcomes the shot-noise limit of sensitivity with enhancement of the Raman signal and inherent background suppression, while remaining fully compatible with standard Raman spectroscopy methods. By incorporating the Raman sample between two phase-sensitive parametric amplifiers that squeeze the light along orthogonal quadrature axes, the typical intensity measurement of the Raman response is converted into a quantum-limited, super-sensitive estimation of phase. The resonant Raman response in the sample induces a phase shift to signal-idler frequency-pairs within the fingerprint spectrum of the molecule, resulting in amplification of the resonant Raman signal by the squeezing factor of the parametric amplifiers, whereas the non-resonant background is annihilated by destructive interference. Seeding the interferometer with classical coherent light stimulates the Raman signal further without increasing the background, effectively forming squeezing-enhanced versions of CARS and SRS, where the quantum enhancement is achieved on top of the classical stimulation.

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