Study on the achieving to strong coupling regime for InAs/GaAs quantum dot embedded in the nanocavity

In order to the generation of single photon and the production of dressed states between photons and electrons in nanophotonic structures, achieving strong coupling regime is necessary. One of the best ways achieving to strong coupling, is quantum dots embedded in nanocavitv of photonic crystalsyesБелгородский государственный университе

The shift of Energy levels of a quantum dot in single electron transistor

The shift of Energy levels of a quantum dot in single electron transistor model is investigated. The self-energy function which related to shift of Energy levels, describing this interaction is added to a bare energy of a dot state. In the standard way of determining the self-interaction corrections to bare energies of quantum dots, the variations of the self-energy functions with energy are ignored, and these corrections are considered to be equal to the values of the self-energy functions for bare energies of state

The signal-to-noise ratio measurement in chloroform detection in the presence of krypton buffer gas by laser photoacoustic method

The signal-to-noise ratio is a measure used in engineering and science that compares the level of a desired signal to the level of background noise. This parameter is one of the main features of the spectrometer devices. In this experimental study, a homemade photoacoustic layout used to detect chloroform vapour in the presence of krypton buffer ga

Optical force near the laser illuminated tapered tip

In this paper, by solving Maxwell's equations with finite difference time domain (FDTD) simulation based on the numerical software, the effect of changing the period of grating on the optical force around tapered tip with 90 degree laser beam incident angle was studied. The optimization results show that optimum value for period of circular gratings in order to achieve maximum optical force enhancement 208 nm was obtaine

Electric Field Enhancement Around Gold Tip Optical Antenna

© 2015, Springer Science+Business Media New York. This paper provides a new design of gold tip optical antenna based on a specific geometry, and then the change of enhancement of the electric field of plane wave laser excitation with 400 to 700 nm around of the optical antenna are simulated. Changing the geometry of optical antenna includes creating circular gratings with the periods 200 and 300 nm on the shaft of antenna. With the exerting of laser light to the place of these gratings, the distribution of enhancement of the electric field in a plane perpendicular to the shaft has been acquired. Finally, the optimized value for the maximum enhancement at the period of 293 nm is obtained

Effects of adding mixed powder of garlic and thyme to diets included graded levels of rice bran on productive performance of laying hens and egg quality characteristics

Code: 6715685418. Mohebbifar, A. and M. Torki; Effects of adding mixed powder of garlic and thyme to diets included graded levels of rice bran on productive performance of laying hens and egg quality characteristics ABSTRACT To investigate the effects of adding dried powder of medicinal plants (MP) including garlic (Allium sativum) and thyme (Thymus vulgaris) to rice bran-included diets on performance of laying hens, egg quality traits and blood differential count of white blood cells, 144 Lohmann LSL-Lite hens after production peak were randomly divided in 24 cages (n=6). Six iso-caloric and iso-nitrogenous experimental diets (ME = 2720 Kcal/ Kg and CP=154.2 g/Kg) including three levels (0, 100 and 200 g/kg) of rice bran (RB) with MP (0 and 2.5 g/kg) were fed hens with 4 replicates per diet during 8-week trial period. In weeks 4 and 8, all produced eggs per each dietary group during three frequent days were collected to measure egg quality traits. To determine blood biochemical parameters and differential count of white blood cells, one randomly selected hen per replicate was bled via wing vein on day 35 of trial. Collected data of feed intake (FI), egg production (EP), egg mass (EM); calculated feed conversion ratio (FCR), egg quality traits and blood parameters in a 3×2 factorial arrangement was analyzed based on completely randomized design using GLM procedure of SAS. Dietary treatment did not have significant effect on EP, EM, FI and FCR of laying hens (P>0.05). Egg weight, egg index, Haugh unit, egg gravity and egg shell weight were not significantly affected by dietary treatment (P>0.05). Yolk color in the first measurement (wk 4) was higher in the control compared to the RB-included dietary group (P=0.02); but, in second egg sampling (wk 8) yolk color was higher in the 200 g RB-included dietary group (P= 0.01) compared the other dietary groups. In second measurement (wk 8) egg shell thickness was higher in the control compared to RB-included dietary groups (P=0.03). Dietary treatment did not have significant effect on feces pH (P> 0.05). From the results of the present study it can be concluded that RB can be included in diets of laying hens up to 20% with no adverse effect on productive performance. In terms of egg quality characteristics, egg shell quality might be improperly affected by dietary RB inclusion. Adding ground mixture of dried garlic and thyme did not have beneficial effects on hens' performance and egg quality

Effect of buffer gases on the performance of SO2 trace measurement based on photoacoustic spectroscopy

In this experimental work a laser photoacoustic spectrometer designed and fabricated. System sensitivity for detection of SO2 and NO 2 was measured. Resonance frequency variation versus pressure increase of Nitrogen, Argon, Helium and Air buffer gases was studied. Results show that, sensitivity of system for SO2 and NO2 are 353 ppb and 963 ppb respectively. It was shown that resonance frequency for Nitrogen, Argon, and Air buffer gases was not noticeably varied by buffer gas pressure increasing, but for Helium, resonance frequency not only is not in range of three other gases, but also grows by pressure increasing. The system noises were damped preparing two buffer chambers. © 2014 Elsevier B.V. All rights reserved

Tunneling-induced self-energy shift of energy levels of a quantum dot

© Published under licence by IOP Publishing Ltd. The self-interaction of a quantum dot tunnel with Coulomb interaction coupled to two noninteracting leads is investigated. The self-energy function describing this interaction is added to a bare energy of a dot state. In the standard way of determining the self-interaction (tunneling-induced) corrections to bare energies of emitters (atoms, quantum dots, etc) the variations of the self-energy functions with energy are ignored, and these corrections are considered to be equal to the values of the self-energy functions for bare energies of states. We show that actually in the case of quantum dots the variations of the self-energy functions in the energy interval between the bare and true energies can be strong, and this can have a significant effect on the values of the tunneling-induced shifts of energy levels of quantum dots

Self-energy function of quantum-dot states and resonance fluorescence

© Published under licence by IOP Publishing Ltd. We investigate the energy dependence of self-energy functions of quantum-dot states that describe the interaction of quantum dots with vacuum. It is shown that the variation of these self-energy functions can be significant and this can have a significant effect on processes of quantum interference from quantum dots