Enhancing the Magnetic Resonance via Strong Coupling in Optical Metamaterials

2017 ◽  
Vol 5 (20) ◽  
pp. 1700469 ◽  
Author(s):  
Chen Zhang ◽  
Jimao Fang ◽  
Wenhong Yang ◽  
Qinghai Song ◽  
Shumin Xiao
Keyword(s):  
Magnetic Resonance ◽  
Strong Coupling ◽  
Optical Metamaterials

Strong coupling between magnetic resonance and propagating surface plasmons at visible light frequencies

2020 ◽  
Vol 152 (1) ◽  
pp. 014702 ◽  
Author(s):  
Jingyu Wang ◽  
Weimin Yang ◽  
Petar M. Radjenovic ◽  
Yonglin He ◽  
Zhilin Yang ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Visible Light ◽  
Surface Plasmons ◽  
Strong Coupling

scholarly journals Surprising absence of strong homonuclear coupling at low magnetic field explored by two-field nuclear magnetic resonance spectroscopy

2020 ◽  
Vol 1 (2) ◽  
pp. 237-246
Author(s):  
Ivan V. Zhukov ◽  
Alexey S. Kiryutin ◽  
Ziqing Wang ◽  
Milan Zachrdla ◽  
Alexandra V. Yurkovskaya ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
External Magnetic Field ◽  
Strong Coupling ◽  
Polarization Transfer ◽  
Strong Coupling Regime ◽  
Low Field ◽  
Spin Interactions ◽  
Proton Decoupling

Abstract. Strong coupling of nuclear spins, which is achieved when their scalar coupling 2πJ is greater than or comparable to the difference Δω in their Larmor precession frequencies in an external magnetic field, gives rise to efficient coherent longitudinal polarization transfer. The strong coupling regime can be achieved when the external magnetic field is sufficiently low, as Δω is reduced proportional to the field strength. In the present work, however, we demonstrate that in heteronuclear spin systems these simple arguments may not hold, since heteronuclear spin–spin interactions alter the Δω value. The experimental method that we use is two-field nuclear magnetic resonance (NMR), exploiting sample shuttling between the high field, at which NMR spectra are acquired, and the low field, where strong couplings are expected and at which NMR pulses can be applied to affect the spin dynamics. By using this technique, we generate zero-quantum spin coherences by means of a nonadiabatic passage through a level anticrossing and study their evolution at the low field. Such zero-quantum coherences mediate the polarization transfer under strong coupling conditions. Experiments performed with a 13C-labeled amino acid clearly show that the coherent polarization transfer at the low field is pronounced in the 13C spin subsystem under proton decoupling. However, in the absence of proton decoupling, polarization transfer by coherent processes is dramatically reduced, demonstrating that heteronuclear spin–spin interactions suppress the strong coupling regime, even when the external field is low. A theoretical model is presented, which can model the reported experimental results.

scholarly journals Symmetry breaking and strong coupling in planar optical metamaterials

2010 ◽  
Vol 18 (13) ◽  
pp. 13407 ◽  
Author(s):  
Koray Aydin ◽  
Imogen M. Pryce ◽  
Harry A. Atwater
Keyword(s):  
Symmetry Breaking ◽  
Strong Coupling ◽  
Optical Metamaterials

An emerging technology: Nuclear magnetic resonance microscopy

1988 ◽  
Vol 46 ◽  
pp. 1000-1001
Author(s):  
M.J. Hennessy ◽  
E. Kwok
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Relaxation Times ◽  
Basic Research ◽  
Local Environment ◽  
Magnetic Resonance Images ◽  
Nmr Microscopy ◽  
Mri Scans ◽  
Temperature Relaxation ◽  
Nuclear Magnetic

Much progress in nuclear magnetic resonance microscope has been made in the last few years as a result of improved instrumentation and techniques being made available through basic research in magnetic resonance imaging (MRI) technologies for medicine. Nuclear magnetic resonance (NMR) was first observed in the hydrogen nucleus in water by Bloch, Purcell and Pound over 40 years ago. Today, in medicine, virtually all commercial MRI scans are made of water bound in tissue. This is also true for NMR microscopy, which has focussed mainly on biological applications. The reason water is the favored molecule for NMR is because water is,the most abundant molecule in biology. It is also the most NMR sensitive having the largest nuclear magnetic moment and having reasonable room temperature relaxation times (from 10 ms to 3 sec). The contrast seen in magnetic resonance images is due mostly to distribution of water relaxation times in sample which are extremely sensitive to the local environment.

Functional information from magnetic resonance imaging

1995 ◽  
Vol 53 ◽  
pp. 84-85
Author(s):  
Alan P. Koretsky ◽  
Afonso Costa e Silva ◽  
Yi-Jen Lin
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Cancer Biology ◽  
Imaging Modality ◽  
Magnetic Resonance Images ◽  
Great Success ◽  
Functional Information ◽  
Resonance Imaging ◽  
High Resolution Mri

Magnetic resonance imaging (MRI) has become established as an important imaging modality for the clinical management of disease. This is primarily due to the great tissue contrast inherent in magnetic resonance images of normal and diseased organs. Due to the wide availability of high field magnets and the ability to generate large and rapidly switched magnetic field gradients there is growing interest in applying high resolution MRI to obtain microscopic information. This symposium on MRI microscopy highlights new developments that are leading to increased resolution. The application of high resolution MRI to significant problems in developmental biology and cancer biology will illustrate the potential of these techniques.In combination with a growing interest in obtaining high resolution MRI there is also a growing interest in obtaining functional information from MRI. The great success of MRI in clinical applications is due to the inherent contrast obtained from different tissues leading to anatomical information.

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