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We present a theoretical analysis of the quantum efficiency of a resonant cavity enhanced InGaAs/GaAs p-i-n photodetector (PD) for the ultrashort optical connections. The numerical method of calculation of quantum efficiency combining a transfer matrix method and an energy conservation law is offered. Using anomalous dispersion (AD) mirror, flat-topped QE spectrum has been obtained. Conditions for...
We study de nonlinear optical properties of organic materials. Multiple rings appear as a CW Ar laser passes through a nonlinear organic liquid. The rings formation is due to spatial self-phase modulation and is observed with 50 mW of continuous wave of Ar laser. We show the dependence between power and rings formed. As a first approximation to value the nonlinear refractive index we use the number...
In this work, the simulation of the 980 nm InGaAs intra-cavity-contacted oxide-confined vertical-cavity surface-emitting lasers (ICOC VCSELs) with separated triplets of quantum wells (STQW) is presented. We analyze the thermal, electrical and optical properties of such devices. Results of simulations show the larger optical power efficiency and higher modulation bandwidth for devices with included...
The results of chemical synthesis and optical behavior of silver nanoparticles with sizes ranging from 2–10nm which were obtained by reduction of Ag + are reported. The material morphology was examined by transmission electron microscopy (TEM) and physical properties were studied by photoluminescence in the range of 400–550nm using two different excitation wavelengths (320 and 380nm). The...
In this work we present the formation of dark photonic lattices in negative nonlinear medium. Bright periodic lattices are generated by interference technique and propagated through 1 cm of length of nonlinear medium (R6G with acetone). The dependence with the laser (Ar) power and the geometry selected are showed. Three very interesting cases were obtained: two dimensional dark photonic lattices (2D),...
Carrier transport in semiconductor quantum wells relevant for high-speed properties of QW lasers and SOAs is addressed. The emphasis is on tunneling in asymmetric MQWs. It is shown that tunneling is occurring on the time scale of intraband scattering or shorter.
We simulate compression of the chirped femtosecond laser pulse in the chirped mirror. The found results show an ability to achieve a 90% pulse compression under single reflection from the mirror. It has found that 39 number of TiO2/SiO2 layer pairs is optimal value for compression of the given femtosecond pulse.
We demonstrate that periodic lattice arrays can be formed by interferometry patterns. An advantage of this system is the possibility of change different geometries of periodic lattice arrays only varying the mirror of the experimental setup. The patterns can be recorded in a special film emulsion and we studied the photonic band-gaps for different geometries
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