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This paper presents a technological study aimed at growing buried-channel heterostructures for single-mode semiconductor lasers operating in the spectral range 1600–1610 nm. We have produced laser diodes with an emission wavelength corresponding to an overtone in the absorption band of carbon dioxide and assessed the effect of temperature on their optical emission spectra. It has been shown that their emission spectra can be tuned over the range from 1559 to 1620 nm. We have demonstrated the feasibility of producing intelligent fiber-optic systems for remote carbon dioxide concentration monitoring. [ABSTRACT FROM AUTHOR]

We have studied the growth of zinc selenide layers on flat and shaped indium phosphide surfaces. The growth rate of zinc selenide has been shown to depend on substrate orientation. It has been shown that the present results can be useful in designing mesa stripe structures for quantum electronic instruments. We have fabricated mesa stripe laser diodes operating on the absorption band of methane and suitable for producing fiber-optic signal transmission systems. [ABSTRACT FROM AUTHOR]

This paper presents an analytical review that addresses physicochemical principles underlying the synthesis of granular structures in semiconductor–ferromagnet systems. Such systems comprise a II–IV–V2, II2–V3, or II–V2 compound as a semiconductor and MnAs as a ferromagnet. We demonstrate that granular magnetic structures are an alternative to superlattices in spintronic devices and can exhibit giant magnetoresistance and tunneling magnetoresistance effects. It is shown that, owing to the high carrier mobility in semiconductors, they are more attractive as matrices of granular materials than are metals or dielectrics. We have formulated the basic principles underlying the synthesis of granular structures with high magnetoresistance based on eutectic systems. Eutectic crystallization involves simultaneous crystallization of all the constituent phases, leading to the formation of an unusual, fine structure. High cooling rates are favorable for metastable crystallization. This causes a synergistic effect, stimulating nanostructuring and favoring the formation of granular structures. We present results on semiconductor–ferromagnet systems and demonstrate the possibility of producing granular magnetic structures with high magnetoresistance in such systems. [ABSTRACT FROM AUTHOR]

We have studied the interaction of etchants and etchant mixtures with {100} planes of InP substrates. The results demonstrate that mesa stripes and grooves faceted by a combination of planes differing in polarity—{111}A, {111}B, {110}, {112}A, or {221}A—can be obtained by properly selecting the etchant and the orientation of the mask coating. The mesa stripes have been shown to be faceted by the most close-packed planes and, in the case of polar properties, they are faceted by planes with a low dissolution rate ({111}A for the sphalerite lattice). The most close-packed planes {111}A and {111}B differ in their orientation relative to the (110) and ( 10) basal planes. [ABSTRACT FROM AUTHOR]