scholarly journals Spectrally resolved observations of atmospheric emitted radiance in the H2O rotation band

2008 ◽  
Vol 35 (4) ◽  
Author(s):  
R. Bhawar ◽  
G. Bianchini ◽  
A. Bozzo ◽  
M. Cacciani ◽  
M. R. Calvello ◽  
...  
Keyword(s):  
Rotation Band ◽  
Spectrally Resolved

Colloidal Plasmonic Nanostar Antennas with Wide Range Resonance Tunability

2019 ◽  
Author(s):  
Theodoros Tsoulos ◽  
Supriya Atta ◽  
Maureen Lagos ◽  
Michael Beetz ◽  
Philip Batson ◽  
...  
Keyword(s):  
Single Particle ◽  
Structural Complexity ◽  
Field Enhancement ◽  
Hot Electron ◽  
Structure Property ◽  
Plasmon Band ◽  
Gold Nanostars ◽  
Wide Range ◽  
Particle Level ◽  
Spectrally Resolved

<div>Gold nanostars display exceptional field enhancement properties and tunable resonant modes that can be leveraged to create effective imaging tags or phototherapeutic agents, or to design novel hot-electron based photocatalysts. From a fundamental standpoint, they represent important tunable platforms to study the dependence of hot carrier energy and dynamics on plasmon band intensity and position. Toward the realization of these platforms, holistic approaches taking into account both theory and experiments to study the fundamental behavior of these</div><div>particles are needed. Arguably, the intrinsic difficulties underlying this goal stem from the inability to rationally design and effectively synthesize nanoparticles that are sufficiently monodispersed to be employed for corroborations of the theoretical results without the need of single particle experiments. Herein, we report on our concerted computational and experimental effort to design, synthesize, and explain the origin and morphology-dependence of the plasmon modes of a novel gold nanostar system, with an approach that builds upon the well-known plasmon hybridization model. We have synthesized monodispersed samples of gold nanostars with finely tunable morphology employing seed-mediated colloidal protocols, and experimentally observed narrow and spectrally resolved harmonics of the primary surface plasmon resonance mode both at the single particle level (via electron energy loss spectroscopy) and in ensemble (by UV-Vis and ATR-FTIR spectroscopies). Computational results on complex anisotropic gold nanostructures are validated experimentally on samples prepared colloidally, underscoring their importance as ideal testbeds for the study of structure-property relationships in colloidal nanostructures of high structural complexity.</div>

Failure Analysis and Defect Inspection of Electronic Devices by High-Resolution Cathodoluminescence

2017 ◽  
Author(s):  
C. Monachon ◽  
M.S. Zielinski ◽  
D. Gachet ◽  
S. Sonderegger ◽  
S. Muckenhirn ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Electronic Materials ◽  
Electronic Devices ◽  
Optical Emission ◽  
Large Field ◽  
Nanometer Scale ◽  
Defect Analysis ◽  
Defect Inspection ◽  
Spectrally Resolved ◽  
Non Destructive

Abstract Quantitative cathodoluminescence (CL) microscopy is a new optical spectroscopy technique that measures electron beam-induced optical emission over large field of view with a spatial resolution close to that of a scanning electron microscope (SEM). Correlation of surface morphology (SE contrast) with spectrally resolved and highly material composition sensitive CL emission opens a new pathway in non-destructive failure and defect analysis at the nanometer scale. Here we present application of a modern CL microscope in defect and homogeneity metrology, as well as failure analysis in semiconducting electronic materials

Photon Emission Spectral Signatures of AlGaN/GaN HEMT for Functional and Reliability Analysis

2008 ◽  
Author(s):  
Arkadiusz Glowacki ◽  
Christian Boit ◽  
Richard Lossy ◽  
Joachim Würfl
Keyword(s):  
Reliability Analysis ◽  
Gate Voltage ◽  
Near Infrared ◽  
Photon Emission ◽  
Electrical Characterization ◽  
Spectral Signatures ◽  
Operating Modes ◽  
Gan Hemt ◽  
Spectrally Resolved ◽  
Performance Variations

Abstract Non-degraded and degraded AlGaN/GaN HEMT devices have been characterized electrically and investigated in various operating modes using integral and spectrally resolved photon emission (PE). In degraded devices the PE dependence on the gate voltage differs from the non-degraded devices. Various types of dependencies on the gate voltage have been identified when investigating local degradation sites. PE spectroscopy was performed at various bias conditions. For both devices broad spectra have been obtained in a wavelength regime from visible to near-infrared, including local performance variations. Signatures of the degradation have been determined in the electrical characterization, in integral PE distribution and in the PE spectrum.

scholarly journals A white light confocal microscope for spectrally resolved multidimensional imaging

2007 ◽  
Vol 227 (3) ◽  
pp. 203-215 ◽  
Author(s):  
J. H. FRANK ◽  
A. D. ELDER ◽  
J. SWARTLING ◽  
A. R. VENKITARAMAN ◽  
A. D. JEYASEKHARAN ◽  
...  
Keyword(s):  
White Light ◽  
Confocal Microscope ◽  
Multidimensional Imaging ◽  
Spectrally Resolved

scholarly journals Spectrally resolved ion imaging from laser produced plasmas using CR-39 detectors

AIP Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 015232
Author(s):  
S. V. Rahul ◽  
Rakesh Y. Kumar ◽  
T. Sairam ◽  
Ratul Sabui ◽  
Angana Mondal ◽  
...  
Keyword(s):  
Ion Imaging ◽  
Spectrally Resolved ◽  
Cr 39 Detectors

Intermolecular Interactions and Self-Assembly in Pt(II) Complex–Nanoclay Hybrids as Luminescent Reporters for Spectrally Resolved PLIM

2021 ◽  
Author(s):  
Sathish Chatnahalli Gangadharappa ◽  
Iván Maisuls ◽  
Ileana P. Salto ◽  
Silke Niemann ◽  
Viktoria Bachtin ◽  
...  
Keyword(s):  
Intermolecular Interactions ◽  
Self Assembly ◽  
Spectrally Resolved

Spectrally resolved and phase-sensitive far-field measurement for the coherent addition of laser pulses in a tiled grating compressor

2010 ◽  
Vol 35 (12) ◽  
pp. 2073 ◽  
Author(s):  
Marco Hornung ◽  
Ragnar Bödefeld ◽  
Alexander Kessler ◽  
Joachim Hein ◽  
Malte C. Kaluza
Keyword(s):  
Field Measurement ◽  
Laser Pulses ◽  
Far Field ◽  
Phase Sensitive ◽  
Spectrally Resolved

scholarly journals Comparing Donor- and Acceptor-Originated Exciton Dynamics in Non-Fullerene Acceptor Blend Polymeric Systems

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1770
Author(s):  
Chan Im ◽  
Sang-Woong Kang ◽  
Jeong-Yoon Choi ◽  
Jongdeok An
Keyword(s):  
Flexible Electronics ◽  
Transient Absorption ◽  
Film Formation ◽  
Transient Absorption Spectroscopy ◽  
Excitation Wavelength ◽  
Polymeric Systems ◽  
Donor And Acceptor ◽  
Novel Material ◽  
Spectrally Resolved ◽  
Energy Strategies

Non-fullerene type acceptors (NFA) have gained attention owing to their spectral extension that enables efficient solar energy capturing. For instance, the solely NFA-mediated absorbing region contributes to the photovoltaic power conversion efficiency (PCE) as high as ~30%, in the case of the solar cells comprised of fluorinated materials, PBDB-T-2F and ITIC-4F. This implies that NFAs must be able to serve as electron donors, even though they are conventionally assigned as electron acceptors. Therefore, the pathways of NFA-originated excitons need to be explored by the spectrally resolved photovoltaic characters. Additionally, excitation wavelength dependent transient absorption spectroscopy (TAS) was performed to trace the nature of the NFA-originated excitons and polymeric donor-originated excitons separately. Unique origin-dependent decay behaviors of the blend system were found by successive comparing of those solutions and pristine films which showed a dramatic change upon film formation. With the obtained experimental results, including TAS, a possible model describing origin-dependent decay pathways was suggested in the framework of reaction kinetics. Finally, numerical simulations based on the suggested model were performed to verify the feasibility, achieving reasonable correlation with experimental observables. The results should provide deeper insights in to renewable energy strategies by using novel material classes that are compatible with flexible electronics.

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