Effect of different laser polarization direction on high order harmonic generation of N2 and H2
The high order harmonic generations of N2 and H2 irradiated by ultrastrong femtosecond pulsed laser are simulated by the time dependent density functional theory method, and effect of different laser ...
The high order harmonic generations of N2 and H2 irradiated by ultrastrong femtosecond pulsed laser are simulated by the time dependent density functional theory method, and effect of different laser ...
Strong optical activity in chiral metamaterials of metal screw hole arrays
The authors demonstrate the change of the polarization of the electromagnetic wave induced by chiral metamaterials in the terahertz region. The polarization of the incident terahertz wave changes dram...
The authors demonstrate the change of the polarization of the electromagnetic wave induced by chiral metamaterials in the terahertz region. The polarization of the incident terahertz wave changes dram...
Magnetoencephalography with an atomic magnetometer
Appl. Phys. Lett. 89, 211104 (2006); doi:10.1063/1.2392722
Published 21 November 2006
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The authors demonstrate detection and mapping of brain magnetic fields evoked by auditory stimulation with a noncryogenic magnetometer based on spin precession of potassium atoms in spin-exchange-relaxation-free regime. Optical readout using a photodiode array allows flexibility in detector placement while using common elements for most components of the multichannel system. Absence of a cryogenic dewar eliminates magnetic Johnson noise from radiation shields and allows the use of a compact magnetic shield with a high shielding factor. The magnetometer sensitivity is currently equal to 3.5 fT/Hz1/2 at 10 Hz, similar to superconducting quantum interference device magnetoencephalography systems.
©2006 American Institute of Physics
| History: | Received 5 September 2006; accepted 5 October 2006; published 21 November 2006 |
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http://link.aip.org/link/?APPLAB/89/211104/1 |
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