OPTICALLY DETECTED E.P.R. OF SELF-TRAPPED EXCITONS IN ALKALI FLUORIDES-LUMINESCENCE IDENTIFICATION

1976 ◽  
Vol 37 (C7) ◽  
pp. C7-221-C7-224 ◽  
Author(s):  
A. WASIELA ◽  
D. BLOCK
Keyword(s):  
Optically Detected

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.

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.

scholarly journals Nanometre-Scale Visualization of Chemical Parameter Changes by T1-Weighted ODMR Imaging Using a Fluorescent Nanodiamond

Chemosensors ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 68
Author(s):  
Takahiro Fujisaku ◽  
Ryuji Igarashi ◽  
Masahiro Shirakawa
Keyword(s):  
Magnetic Resonance ◽  
Laser Pulse ◽  
Real Time ◽  
Physical Parameters ◽  
Biological Processes ◽  
Chemical Parameter ◽  
Ph Conditions ◽  
Optically Detected ◽  
Life Phenomena ◽  
Selection Of

The dynamics of physical parameters in cells is strongly related to life phenomena; thus, a method to monitor and visualize them on a single-organelle scale would be useful to reveal unknown biological processes. We demonstrate real-time nanometre-scale T1-weighted imaging using a fluorescent nanodiamond. We explored optically detected magnetic resonance (ODMR) contrast at various values of interval laser pulse (τ), showing that sufficient contrast is obtained by appropriate selection of τ. By this method, we visualized nanometre-scale pH changes using a functionalized nanodiamond whose T1 has a dependence on pH conditions.

Lineshapes of Optically Detected Nuclear Magnetic Resonance in GaAs/AlGaAs Heterostructures

1997 ◽  
Vol 124 (1) ◽  
pp. 80-86 ◽  
Author(s):  
M. Schreiner ◽  
H. Höchstetter ◽  
H. Pascher ◽  
S.A. Studenikin
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Optically Detected ◽  
Nuclear Magnetic

Optically detected magnetic resonance study of SiC:Ti

1985 ◽  
Vol 32 (4) ◽  
pp. 2273-2284 ◽  
Author(s):  
K. M. Lee ◽  
Le Si Dang ◽  
G. D. Watkins ◽  
W. J. Choyke
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Study ◽  
Optically Detected Magnetic Resonance ◽  
Optically Detected
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