scholarly journals Наблюдение когерентных осцилляций населенности NV-центров в алмазе в микроволновом диапазоне

2021 ◽  
Vol 129 (3) ◽  
pp. 301
Author(s):  
Р.А. Ахмеджанов ◽  
Л.А. Гущин ◽  
И.В. Зеленский ◽  
В.А. Низов ◽  
Н.А. Низов ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Microwave Radiation ◽  
Ground State ◽  
Room Temperature ◽  
Optical Radiation ◽  
Radiation Power ◽  
Experimental Results ◽  
State Transitions ◽  
Feature Parameters ◽  
Optically Detected

We demonstrate experimental results showing narrow features in room temperature optically detected magnetic resonance spectra that appear when the ground state transitions are driven by bichromatic or amplitude modulated microwave radiation. We study the dependence of the feature parameters on the intensity of optical radiation and microwave radiation power.

Photoluminescence and Odmr Studies of Pristine and Photodegraded Poly (3-Hexylthiophene) Films and Solutions

1989 ◽  
Vol 173 ◽  
Author(s):  
L. S. Swanson ◽  
J. Shinar ◽  
L. R. Lichty ◽  
K. Yoshino
Keyword(s):  
Magnetic Resonance ◽  
Room Temperature ◽  
Oxidation Process ◽  
Optically Detected Magnetic Resonance ◽  
Optically Detected ◽  
Increasing Temperature

ABSTRACTThe photoluminescence (PL) and optically detected magnetic resonance (ODMR) spectra of poly(3-hexylthiophene) in solutions of CCl4, toluene, and CH2Cl2, and films cast from these solutions, are described and discussed. In solution, the PL yield is 7%, and increases with increasing temperature. In oxygen-free, protected films cast from these solutions, the room-temperature yield is ∼0.7%, the spectra is red shifted by ∼0.5eV, and strong peaks at 1.52, 1.69, and 1.86eV appear. In films and CH2Cl2 solutions, the ODMR is resolvable into narrow and broad components, and its intensity ΔL/L is ∼5 × l0−5 at room temperature. A strong photoinduced oxidation process quenches the PL upon exposure to O2 but not water, at a rate possibly limited by O2 diffusion.

Creation of Color Centers in SiC PN Diodes Using Proton Beam Writing

2019 ◽  
Vol 963 ◽  
pp. 709-713
Author(s):  
Yoji Chiba ◽  
Yuichi Yamazaki ◽  
Takahiro Makino ◽  
Shinichiro Sato ◽  
Naoto Yamada ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Proton Beam ◽  
Room Temperature ◽  
Color Centers ◽  
Silicon Vacancy ◽  
Proton Beam Writing ◽  
Pn Junction ◽  
Optically Detected Magnetic Resonance ◽  
Junction Diode ◽  
Optically Detected

We demonstrated that silicon vacancy (VSi) can be created in SiC pn junction diode by proton beam writing (PBW) without degradation of the diode performance. The VSi showed the same specific emission for both optically and electrically excitation, which suggests that electrically controllable VSi was created. In addition, optically detected magnetic resonance (ODMR) signal was successfully detected from optically excited VSi at room temperature. This result suggests that VSi introduced into the device by PBW still maintain spin manipulating capability, which is an important step toward realizing SiC devices internally equipped with a VSi-based quantum sensor.

Deactivation Study of Electronically Excited Cl(2p1/2) Atoms by Socl2 , Ccl3h, C2h4 , No2 Molecules with Laser Magnetic Resonance (Lmr) Technique

2009 ◽  
Vol 4 (4) ◽  
pp. 42-48
Author(s):  
Asylkhan Rakhymzhan ◽  
Pavel Koshlyakov ◽  
Petr Dementiev ◽  
Оleg Aseev ◽  
Alexey Chichinin
Keyword(s):  
Magnetic Resonance ◽  
Quantum Yield ◽  
Ground State ◽  
Room Temperature ◽  
Spin Orbital ◽  
Time Resolved ◽  
Relative Quantum Yield ◽  
Relative Quantum ◽  
Electronically Excited ◽  
Laser Magnetic Resonance

The method of time-resolved laser magnetic resonance (LMR) has been employed to detect spin-orbital excited chlorine Cl*(≡Cl(2P1/2)) atoms at room temperature. The rate constants for the deactivation of Cl* 11 3 10 cm /molecule , 2 s by SOCl2(0.62 0.2), CCl3H (18 5), C2H4(1.5 0.4) and NO2 (1.5 0.4) are reported. The unknown in literature rate constant for the thermo-neutral reaction of ground state Cl(2P3/2) atoms with SOCl2 were measured. The relative quantum yield of Cl* in photodissociation of SOCl2 is determined to be 0.52 ± 0.03.

Treatment Investigation on Retting Hemp Waste Water with the Synergy of Activated Carbon and Microwave

2013 ◽  
Vol 634-638 ◽  
pp. 321-325
Author(s):  
Rong Yang ◽  
Quan Li Feng ◽  
Yu Jia ◽  
Chun Mei Shi
Keyword(s):  
Waste Water ◽  
Experimental Investigation ◽  
Activated Carbon ◽  
Microwave Radiation ◽  
Ph Value ◽  
Irradiation Time ◽  
Radiation Power ◽  
Experimental Results ◽  
Water Volume ◽  
Initial Ph

Treatment of retting hemp waste water was made by the synergy of activated carbon and microwave in this experimental investigation, and the four factors that influenced the experimental results were considered in which there were respectively the material ratio of activated carbon dosage and retting hemp waste water volume, microwave radiation power, microwave radiation time and the initial pH value of retting hemp waste water. The experimental results showed that, while the material ratio was 7:50 (i.e., the quality of activated carbon was 7g as the volume of retting hemp waste water was 50mL), the microwave radiation power and the microwave irradiation time were respectively 320W and 13min, and the initial pH value of retting hemp waste water was just 2, the treatment effect of retting hemp waste water was best in this experimental investigation.

Optically Detected Magnetic Resonance and Double Beam Photoluminescence of CdS/HgS/CdS Nanoparticles

1998 ◽  
Vol 536 ◽  
Author(s):  
H. Porteanu ◽  
A. Glozman ◽  
E. Lifshitz ◽  
A. Eychmüller ◽  
H. Weller
Keyword(s):  
Optical Properties ◽  
Magnetic Resonance ◽  
Cds Nanoparticles ◽  
Electron Hole ◽  
Cladding Layer ◽  
Double Beam ◽  
Optically Detected Magnetic Resonance ◽  
Optically Detected ◽  
Cladding Layers ◽  
Hole Recombination

AbstractCdS/HgS/CdS nanoparticles consist of a CdS core, epitaxially covered by one or two monolayers of HgS and additional cladding layers of CdS. The present paper describes our efforts to identify the influence of CdS/HgS/CdS interfaces on the localization of the photogenerated carriers deduced from the magneto-optical properties of the materials. These were investigated by the utilization of optically detected magnetic resonance (ODMR) and double-beam photoluminescence spectroscopy. A photoluminescence (PL) spectrum of the studied material, consists of a dominant exciton located at the HgS layer, and additional non-excitonic band, presumably corresponding to the recombination of trapped carriers at the interface. The latter band can be attenuated using an additional red excitation. The ODMR measurements show the existence of two kinds of electron-hole recombination. These electron-hole pairs maybe trapped either at a twin packing of a CdS/HgS interface, or at an edge dislocation of an epitaxial HgS or a CdS cladding layer.

Room-Temperature Chemical Synthesis of C2

2019 ◽  
Author(s):  
Kazunori Miyamoto ◽  
Shodai Narita ◽  
Yui Masumoto ◽  
Takahiro Hashishin ◽  
Mutsumi Kimura ◽  
...  
Keyword(s):  
Chemical Synthesis ◽  
Ground State ◽  
Room Temperature ◽  
Chemical Species ◽  
Quadruple Bond ◽  
Photon Excitation ◽  
Physical Energy ◽  
Theoretical Predictions ◽  
Carbon Arc ◽  
Inherent Nature

Diatomic carbon (C<sub>2</sub>) is historically an elusive chemical species. It has long been believed that the generation of C<sub>2 </sub>requires extremely high “physical” energy, such as an electric carbon arc or multiple photon excitation, and so it has been the general consensus that the inherent nature of C<sub>2 </sub><i>in the ground state </i>is experimentally inaccessible. Here, we present the first “chemical” synthesis of C<sub>2 </sub>in a flask at <i>room temperature or below</i>, providing the first experimental evidence to support theoretical predictions that (1) C<sub>2 </sub>has a singlet biradical character with a quadruple bond, thus settling a long-standing controversy between experimental and theoretical chemists, and that (2) C<sub>2 </sub>serves as a molecular element in the formation of sp<sup>2</sup>-carbon allotropes such as graphite, carbon nanotubes and C<sub>60</sub>.

Spin Resonance

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Magnetic Resonance ◽  
Nuclear Spin ◽  
Electromagnetic Waves ◽  
Zeeman Splitting ◽  
Resonant Absorption ◽  
Magnetic Interactions ◽  
Spin Effects ◽  
Crystalline Environment ◽  
Spin Resonance ◽  
Optically Detected

This chapter is devoted to one of key phenomena in the field of spin physics, namely, resonant absorption of electromagnetic waves under conditions where the Zeeman splitting of spin levels in magnetic field is equal to photon energy. This method is particularly important for identification of nuclear spin effects, because resonance spectra provide fingerprints of different involved spin species and make it possible to distinguish different nuclear isotopes. As discussed in this chapter the nuclear magnetic resonance provides also an access to local magnetic fields acting on nuclear spins. These fields are caused by the magnetic interactions between the nuclei and by the quadrupole splittings of nuclear spin states in anisotropic crystalline environment. Manifestations of spin resonance in optical responses of semiconductors–that is, optically detected magnetic resonance–are discussed.

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