Optical spectrometry : principles and instrumentation

1987 ◽  
pp. 77-105
Author(s):  
P. J. Potts
Keyword(s):  
Optical Spectrometry

scholarly journals Quantum-Optical Spectrometry in Relativistic Laser–Plasma Interactions Using the High-Harmonic Generation Process: A Proposal

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 192
Author(s):  
Theocharis Lamprou ◽  
Rodrigo Lopez-Martens ◽  
Stefan Haessler ◽  
Ioannis Liontos ◽  
Subhendu Kahaly ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Quantum Electrodynamics ◽  
Laser Field ◽  
High Harmonic ◽  
Intense Laser ◽  
Strong Laser Field ◽  
Laser Plasma Interactions ◽  
Strong Laser ◽  
Optical Spectrometry ◽  
Quantum Optical

Quantum-optical spectrometry is a recently developed shot-to-shot photon correlation-based method, namely using a quantum spectrometer (QS), that has been used to reveal the quantum optical nature of intense laser–matter interactions and connect the research domains of quantum optics (QO) and strong laser-field physics (SLFP). The method provides the probability of absorbing photons from a driving laser field towards the generation of a strong laser–field interaction product, such as high-order harmonics. In this case, the harmonic spectrum is reflected in the photon number distribution of the infrared (IR) driving field after its interaction with the high harmonic generation medium. The method was implemented in non-relativistic interactions using high harmonics produced by the interaction of strong laser pulses with atoms and semiconductors. Very recently, it was used for the generation of non-classical light states in intense laser–atom interaction, building the basis for studies of quantum electrodynamics in strong laser-field physics and the development of a new class of non-classical light sources for applications in quantum technology. Here, after a brief introduction of the QS method, we will discuss how the QS can be applied in relativistic laser–plasma interactions and become the driving factor for initiating investigations on relativistic quantum electrodynamics.

scholarly journals Optical-Spectrometry-Based Method for Immunosuppressant Medicine Level Detection in Aqueous Solutions

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2001 ◽  
Author(s):  
Marcin Marzejon ◽  
Monika Kosowska ◽  
Daria Majchrowicz ◽  
Barbara Bułło-Piontecka ◽  
Michał Wąsowicz ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Optical Spectrometry

A brief review on mass/optical spectrometry for imaging analysis of biological samples

2018 ◽  
Vol 54 (1) ◽  
pp. 57-85 ◽  
Author(s):  
Xinrong Xu ◽  
Jingjun Zhong ◽  
Yingying Su ◽  
Zhirong Zou ◽  
Yaqin He ◽  
...  
Keyword(s):  
Biological Samples ◽  
Imaging Analysis ◽  
Optical Spectrometry

Depth Profiling Investigation of Seawater Using Combined Multi-Optical Spectrometry

2020 ◽  
Vol 74 (5) ◽  
pp. 563-570 ◽  
Author(s):  
Wangquan Ye ◽  
Jinjia Guo ◽  
Nan Li ◽  
Fujun Qi ◽  
Kai Cheng ◽  
...  
Keyword(s):  
Deep Sea ◽  
Depth Profiling ◽  
Deep Ocean ◽  
Euphotic Zone ◽  
Depth Resolution ◽  
Remotely Operated Vehicle ◽  
Sea Trial ◽  
Depth Profiles ◽  
Diving Depth ◽  
Optical Spectrometry

Depth profiling investigation plays an important role in studying the dynamic processes of the ocean. In this paper, a newly developed hyphenated underwater system based on multi-optical spectrometry is introduced and used to measure seawater spectra at different depths with the aid of a remotely operated vehicle (ROV). The hyphenated system consists of two independent compact deep-sea spectral instruments, a deep ocean compact autonomous Raman spectrometer and a compact underwater laser-induced breakdown spectroscopy system for sea applications (LIBSea). The former was used to take both Raman scattering and fluorescence of seawater, and the LIBS signal could be recorded with the LIBSea. The first sea trial of the developed system was taken place in the Bismarck Sea, Papua New Guinea, in June 2015. Over 4000 multi-optical spectra had been captured up to the diving depth about 1800 m at maximum. The depth profiles of some ocean parameters were extracted from the captured joint Raman–fluorescence and LIBS spectra with a depth resolution of 1 m. The concentrations of [Formula: see text] and the water temperatures were measured using Raman spectra. The fluorescence intensities from both colored dissolved organic matter (CDOM) and chlorophyll were found to be varied in the euphotic zone. With LIBS spectra, the depth profiles of metallic elements were also obtained. The normalized intensity of atomic line Ca(I) extracted from LIBS spectra raised around the depth of 1600 m, similar to the depth profile of CDOM. This phenomenon might be caused by the nonbuoyant hydrothermal plumes. It is worth mentioning that this is the first time Raman and LIBS spectroscopy have been applied simultaneously to the deep-sea in situ investigations.

Study of CsPbBr3 Nanocrystals and Their Agglomerates by Combined Scanning Probe Microscopy and Optical Spectrometry

2018 ◽  
Vol 125 (6) ◽  
pp. 858-863
Author(s):  
P. A. Dement’ev ◽  
M. S. Dunaevskii ◽  
L. B. Matyushkin ◽  
A. V. Nezhdanov ◽  
A. N. Smirnov ◽  
...  
Keyword(s):  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Probe Microscopy ◽  
Optical Spectrometry

Mass Spectrometric Evidence for Suprathermal Ionization in an Inductively Coupled Argon Plasma

1981 ◽  
Vol 35 (4) ◽  
pp. 380-384 ◽  
Author(s):  
Robert S. Houk ◽  
Harry J. Svec ◽  
Velmer A. Fassel
Keyword(s):  
Inductively Coupled Plasma ◽  
Argon Plasma ◽  
Vacuum System ◽  
Inductively Coupled Plasmas ◽  
Inductively Coupled ◽  
Optical Spectrometry ◽  
Mass Spectrometric Evidence ◽  
Singly Charged ◽  
Coupled Plasmas ◽  
Charged Ions

Mass spectra have been obtained of species in the axial channel of an inductively coupled argon plasma by extracting ions from the inductively coupled plasma into a vacuum system housing a quadrupole mass spectrometer. Ionization temperatures ( Tion) are obtained from relative count rates of m/z-resolved ions according to two general types of ionization equilibrium considerations: (a) the ratio of doubly/singly charged ions of the same element, and (b) the ratio of singly charged ions from two elements of different ionization energy. The Tion values derived from measurement of Ar+2/Ar+, Ba+2/Ba+, Sr+2/Sr+, and Cd+/I+ are all greater than those expected from excitation temperatures measured by other workers. The latter three values for Tion are in reasonable agreement with values obtained by optical spectrometry for a variety of argon inductively coupled plasmas.

scholarly journals Hydrogen Sensor Of TiO2-Based Nanomaterials

2015 ◽  
Vol 60 (2) ◽  
pp. 935-940 ◽  
Author(s):  
B. Łysoń-Sypień ◽  
K. Zakrzewska ◽  
M. Gajewska ◽  
M. Radecka
Keyword(s):  
Gas Sensing ◽  
Hydrogen Sensor ◽  
Integrating Sphere ◽  
Flame Spray ◽  
X Ray Diffraction ◽  
Hydrogen Sensing ◽  
Transmission Electron ◽  
Optical Spectrometry ◽  
Flame Spray Synthesis ◽  
Reference Atmosphere

Abstract The aim of this research was to examine gas sensing properties of TiO2 based nanomaterials. Nanopowders of Cr doped TiO2 with constant Specific Surface Area, SSA, were obtained using Flame Spray Synthesis technique, FSS. Nanomaterials were characterized by Brunauer – Emmett – Teller adsorption isotherms, BET, X – ray diffraction, XRD, Transmission Electron Microscopy, TEM, optical spectrometry UV – vis with the use of an integrating sphere as well as impedance spectroscopy. Detection of hydrogen was carried out over the concentration range of 50 - 3000 ppm at the temperatures extending from 200 to 400°C and synthetic air working as a reference atmosphere. As a result of experiments it appeared that incorporation of 5 at.% of Cr into TiO2 improved hydrogen sensing features due to small crystallite size and predominance of rutile polymorphic phase.

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