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Complex Type-II Interband Cascade MQW Photodetectors

Multiple active subregions, each optimized for a different color, would enable multicolor operation. Multiple-quantum-well (MQW) photodetectors of a proposed type would contain active regions comprising multiple superlattice subregions. These devices would have complex structures: The superlattice of each subregion would be designed for enhanced absorption of photons in a desired wavelength band (typically in the infrared) and multiple subregions of different design would be cascaded for multicolor operation.

Posted in: Briefs, TSP

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Simplified Generation of High-Angular-Momentum Light Beams

Inherent properties of a WGM resonator and optical fiber are exploited. A simplified method of generating a beam of light having a relatively high value of angular momentum (see figure) involves the use of a compact apparatus consisting mainly of a laser, a whispering gallery mode (WGM) resonator, and optical fibers. The method also can be used to generate a Bessel beam. (“Bessel beam” denotes a member of a class of non-diffracting beams, so named because their amplitudes are proportional to Bessel functions of the radii from their central axes. High-order Bessel beams can have high values of angular momentum.)

Posted in: Briefs, TSP

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Foundation Solidification



Posted in: Blog

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Technologies of the Week

Methods are available for the determination of building stability in the event of an earthquake. These methods involve the development of existing shaking table technology to allow more efficient characterization of structural properties. View this technology here.

Posted in: Blog

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Software Patch



Posted in: Blog

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Technology Business Briefs

IM Mobile -- World's fastest, full-functionality, single-user Data Base Management System (DBMS), with unique built-in synchronization. It is about four times faster than Microsoft SQL Server 2005 Mobile on a PDA, making the user experience completely different. Click here.

Posted in: Blog

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Sound Wave Detector



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