The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We benchmark five state-of-the-art computational methods by computing quality factors and resonance wavelengths in photonic crystal membrane L5 and L9 line defect cavities. The convergence of the methods with respect to resolution, degrees of freedom and number of modes is investigated. Convergence is not obtained for some of the methods, indicating that some are more suitable than others for analyzing...
Photon counting X-ray detectors with energy discrimination capabilities can discriminate the energy of incident X-ray photon, thereby spectral imaging is possible with them. Energy calibration is a process to find a linear mapping function between the amplitudes of electric pulses and their corresponding photon energy. For practical and efficient energy calibration, the X-ray tube voltage can be used...
Nano-photonics, where optical structures can manipulate light at the sub-wavelength scale, is making important advances towards optical communications, imaging and sensing. A novel platform suitable for fundamental investigations of light propagation through micro- and nano-structures will be discussed. This platform is based on a dielectric multilayer that sustains Bloch surface waves (BSWs). We...
We propose and experimentally implement the delayed-choice decoherence suppression protocol. Using photonic entanglement, we successfully demonstrated that the choice to suppress decoherence can be delayed after decoherence and even after the detection of a qubit.
Optical signals are increasingly used to transfer and process information, because of their high speed, bandwidth, and propagation distances in transparent optical networks. However, the miniaturization of photonic devices faces a hard block: the diffraction limit. One proposed means to go beyond this limit is to use surface plasmons polaritons (SPPs), charge density waves at the interface between...
Plastic scintillators show several desired characteristics in dosimetry; especially tissue-equivalence is a definite advantage as an electrical personal dosimeter (EPD). The EPD based on an array-type Silicon Photomultiplier (SiPM) coupled to the polystyrene scintillator was proposed at the last time and has been improving. In this research, for the EPD application, the characteristics of plastic...
We estimate the amount of free electrons generated by concealed radioactive materials using MCNP code. This simulation results show that the existence of radioactive sources enhances the number of photons and background free electrons. Those quantities are influenced by density and thickness of container material
The field of gamma-ray astronomy has expanded rapidly during the last decade. In the energy regime from 100 GeV up to several TeV, Imaging Atmospheric Cherenkov Telescopes (IACT) are the most sensitive detectors. Presently all IACTs use photomultiplier tubes for light detection, but for future projects Geiger-mode Avalanche Photodiodes (G-APD) are very promising alternatives. In order to demonstrate...
Activation products from structural materials inside the Korea Superconducting Tokamak Advanced Research (KSTAR) vacuum vessel at 1 month after shutdown were investigated via gamma-ray spectroscopy using a high-purity germanium (HPGe) detector. To carry out this work, the HPGe detector system was placed on the midplane of port P inside the vacuum vessel, and counts were accumulated for a total time...
We demonstrate that platinum nanorods across the gap of a nanoresonator shift or overdamp the resonance depending on the rod-size. Moreover, what is striking is that the thinner nanorods almost completely turn off both the fundamental and higher mode resonances, analogous to the pinch harmonics.
We propose a new protocol for quantum key distribution without basis reconciliation. We show that the security level of the protocol against photon number splitting (PNS) attack is enhanced, relative to the BB84 protocol.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.