Mid-and far-IR focal plane arrays based on Hg1−x CdxTe photodiodes

This review presents the results of the research and development work carried out at the ORION RD&;P Center (Federal State Unitary Enterprise) on HgCdTe photodiodes and focal plane arrays based on solid solutions of mercury and cadmium tellurides for the 3–5 and 8–12 μm spectral ranges. The structure, topology, and parameters of the photodiodes and staring and time-delay-integration focal plane arrays, as well as the structure and circuitry of silicon multiplexers developed for the focal plane arrays, are discussed. The parameters of photodiode arrays of various formats and of a prototype thermal imager based on a 128 × 128 staring focal plane array are presented.     

Ostwald ripening in rarefied systems

Mass exchange between spherical molecular clusters is analyzed in the case when the mean free path of molecules in the intercluster space is much larger than the cluster sizes but much smaller than average intercluster separation. It is shown that there is a steady-state regime when big clusters grow at the expense of the smaller ones (Ostwald ripening), which is characterized by a one-parametric family of self-similar cluster size distribution functions and by an exponentially growing average cluster size. The obtained self-similar cluster size distributions are entirely different from those given by the classical theory of Ostwald ripening. Implications of the obtained results are discussed.     

Method for Measuring the Absolute Spectral Response of Infrared Photodetector Arrays

Journal of Communications Technology and Electronics - Physical and technical aspects of the implementation of an alternative method for measuring the absolute spectral response of infrared...     

Nanostructuring in a system consisting of a thin metal film on a dielectric substrate under irradiation with a high-power ion beam of nanosecond duration

The formation of metal nanoparticles in a system containing a thin metal film on a dielectric substrate and irradiated with a high-power ion beam of nanosecond duration is studied. The nanoparticle formation mechanism is discussed.     

Fourth-order interference between independent biphotons

The interference of biphotons emitted during collinear parametric scattering from two spatially separated regions is investigated experimentally and theoretically. It is shown that in this case the phase of the interference is determined by the pump wavelength and there is no need to equalize the optical paths for radiation from different regions. Pis’ma Zh. éksp. Teor. Fiz. 69, No. 11, 788–794 (10 June 1999)