Recombination balance parameters for GaN/InGaN/AlGaN single-quantum-well green-lightemitting diodes are extracted from optical power and carrier lifetime measurements. The radiative recombination coefficient B is found to depend on two-dimensional density N, with a low-carrier-density limit of B0=1.2×10−4 cm2/s. Sublinearity the light–current characteristic at temperatures ⩾300 K associated nonradiative process whose rate proportional ∼N4.8. external quantum efficiency 5.5% 20 mA results...

AbstractAbstractFabrication methods for low-density fine-structure (cell size < 1 μm) 3-D networks of cellulose triacetate (TAC) are developed. Target densities ranged 4-20 mg/cm3, similar polymer structures were produced both with no load and high-Z cluster dopant concentration up to 30%. Foams varying density down 0.25 plasma critical at the third harmonic iodine laser wavelength supplied shots. Closed-cell network considered monitored as means thermal radiation control in plasma. In...

A new approach has been proposed for analysing the dynamics of laser field amplitude on basis Maxwell's equations. This used to develop a theory calculating modulation characteristics vertical-cavity surface-emitting lasers in small limit. The present analysis allows one sequentially examine and phase electromagnetic light framework single physical model, proceeding from fundamental principles. offers natural unique procedure finding all cavity parameters necessary calculation. An analytical...

Quantum-well ridge GaAs/AlGaAs heterostructure lasers are studied at high pump currents. It is shown that their catastrophic optical damage (COD) preceded, as a rule, by giant kink caused the collapse of waveguide in horizontal plane. found that, increasing coating thickness output end-face diode preparing an intermediate ZnSe layer between cleaved and forming mirror laser, it possible to increase COD threshold factor 1.5–2. This strengthening occurs because provides additional channel for...

Научный журнал «Интеграция образования Integration of Education» публикует оригинальные научные исследования в области интеграции образования.Наименование и содержание рубрик журнала соответствуют следующим отраслям науки: ПЕДАГОГИКА, СОЦИОЛОГИЯ, ПСИХОЛОГИЯ.Редакция осуществляет научное рецензирование (двустороннее слепое) всех поступающих редакцию материалов с целью экспертной оценки.Все рецензенты являются признанными специалистами по тематике рецензируемых материалов.Рецензии хранятся...

2 ФГБОУ ВО «Пензенский государственный технологический университет», г

The cathodoluminescence spectrum of ZnSe single crystals grown from the vapor and liquid phases was investigated in range 400–800 nm internal quantum efficiency η measured at T = 77 °K. A correlation found between free-electron line intensity, but there no other luminescence lines. comparison photoluminescence spectra recorded 4.2 °K for zinc selenide samples annealed selenium with original indicated that saturation during annealing increased improved laser characteristics.

The article explores a new legal mechanism that extends the authority of Federal Antimonopoly Service to control implementation foreign investments not only business entities strategic importance, but also any other Russian that, according antitrust authority, are key importance economics. problems uncertainty regarding mandatory prior coordination with antimonopoly regulator transaction involving investor have been identified differentiate consequences for violation provisions special...

ИЗГОТОВЛЕНИЕ ЭФФЕКТИВНЫХ МАЛОПЛОТНЫХ КОНВЕРТЕРОВ ЛАЗЕРНОГО ИЗЛУЧЕНИЯ В РЕНТГЕНОВСКОЕ И НОВЫЙ

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The purpose of the article to study legal nature institution issuing a warning by an antimonopoly authority stop actions (inaction) that contain signs violation legislation, as well procedural ways its challenge. As result analysis current legislation and law enforcement practice, authors identified number problems arising in process judicial challenge warning, namely length court procedure use formal approach consideration this category cases. conclusions point expediency enshrining...

The article explores the new approaches of Federal Antimonopoly Service to application certain provisions law on control foreign investment in business entities strategic importance. question correlation concepts “control” and “the possibility blocking decisions” was examined, as well problems legal uncertainty re mandatory preliminary approval a transaction which investor plans purchase shares entity that is related type activity. authors concluded it necessary advisable classify company...

Today, the problem of integrating basic and additional information technology education is relevant. Integration particular importance for school informatics, which significantly influenced by digitalization modern society. Some areas can be highlighted in particular: expansion network institutions equipped with digital equipment teaching children how to work it; providing conditions mastering new professions; developing competencies, etc. Modern informatics has a number shortcomings,...

An investigation was made of the electroluminescence spectra a structure with an InxGa1-xN (3 nm thick) quantum well pumped by current pulses up to 4 kA cm-2 density at T=77 and 300 K. Considerable spectral broadening (ΔE=150–200 meV) nonthermal nature observed. A preliminary study stability this light-emitting high-current pump pulses.

Spectral study is presented of strained InGaAs/GaAs/AlGaAs quantum-well laser structure (emission peak near 980 nm) in wide temperature and injection current density ranges. Special measures are undertaken to reduce the distortion spectral distribution spontaneous emission by stimulated optical processes. Dynamic degeneration level over 10 kT at low achieved. The band filling process broadening investigated, characteristics both processes determined.

The development of school teaching systems to enable effective adaptive communication information requires specific pedagogical solutions several important theoretical and methodological problems .These include 1) the discernment basic characteristics needed diagnose improve quality subject preparation for schoolchildren, 2) clarifying role teacher in structure learning process, 3) finding ways integrate content into framework courses on mathematics. purpose our study was determine...

Properties of InGaN/GaN/AlGaN light-emitting heterostructure diodes generating visible radiation were investigated at elevated temperatures (up to 450 K). The optical power fell relatively slowly above room temperature and the characteristic constant was T0* = 400 — 800 K. Auger recombination not detected. position spectral peak Zn-doped practically independent temperature. A red shift emission line quantum-well observed with increase in This corresponded a reduction band gap correction for...

Fabrication methods for low‐density fine‐structure (cell size <1 μm) 3‐D networks of cellulose triacetate (TAC) are developed. Target densities ranged 4–20 mg/cc, similar polymer structures were produced both with no load and high‐Z cluster dopant concentration up to 30%. Foams varying density down 0.25 plasma critical at the third harmonic iodine laser wavelength supplied shots. Experiments underdense foam targets without clusters irradiated on PALS facility analyzed preliminary, showing...

An investigation was made of the depth a layer in cadmium sulfide single crystals disturbed by mechanical polishing surface with various diamond abrasives and chemomechanical polishing. The found periodic etching method deduced from rate intensity photoluminescence emitted 0.47–0.8 μ spectral range at T=77°K. least (3.5–5 μ) best luminescence properties were obtained as result

An investigation of the dynamics catastrophic optical damage a laser diode facet showed that characteristic energy-evolution time was 40–80 ns under pulsed operating conditions. When pulse duration less than this time, governed by critical energy pulse. estimate thickness an overheated region gave 0.6 μm.