International Business Machines Corporation

Kiyoshi Kumata

Satoru S Kano

Soichi Owa

Yutaka Takahashi

Tadashi Fukuzawa

Victor Y Lee

Hiroyuki Ogura

Franklin M Schellenberg

Hiroshi Satoh

A user interface for analyzing multiple dimension data, with which a great number of multiple dimension data sets can be easily and intuitively analyzed and edited. At the least, data having two dimensions are selected from among multiple dimension data. Then, the selected data are assigned to respective coordinate axes so that the coordinate axes cross each other, or intersect each other if two-dimensional data are selected. The coordinate axes are divided, using a predetermined threshold value, into a number of segments, and these segments are assembled to define composite areas for all the coordinate axes. Data are displayed in each of the composite areas in order to enable analysis and editing of multiple dimension data. As a result, in the preferred embodiment, a great number of multiple dimension data sets can be easily and intuitively analyzed and edited.

User interface for analyzing multiple dimension data

A nonlinear optical device comprising a substrate and a film structure coated on to the substrate. The film has, in a direction normal to the substrate, an intercalation structure including a semiconductor layer and an organic layer that lave different energy gaps. The intercalation structure includes a plurality of semiconductor layers and a plurality of organic layers which comprise a quantum well system. The film structure includes an assembly of microcrystals having domain size smaller than that of the wavelength of light with which the device operates. The microcrystals have an axis aligned in a direction normal to the substrate and have randomly oriented axes in a direction parallel to the substrate. A method for producing the device comprises providing a solution of an organic material in a solvent and placing a quantity of the solution on a substrate to form the organic material film structure thereon. The film is formed by spin coating of the solution on the substrate. Preferably the film is comprised of a two-dimensional perovskite such as (C.sub.10 H.sub.21 NH.sub.3).sub.2 PbI.sub.4. The solvent is acetone or dimethoxyl ethane.

Nonlinear optical device and method of manufacturing same

A multi-quantum well structure with a large second order optical nonlinearity and transparent at short wavelengths of up to 350 nm. is described. Alternating insulator and semiconductor layers are grown on a substrate to form a multi-quantum well structure, such that the potential function for electrons in the semiconductor layers is asymmetric in a direction normal to the substrate. Sub-bands of electrons in the conduction band lead to a large optical nonlinearity with efficient second harmonics generation, and is obtained by an appropriate selection of the width and shape of the well. The structure, preferably packaged on the same substrate of a laser diode, is used as an on-chip source of blue light.

Nonlinear optical device

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Tokyo, Japan

Kiyoshi Kumata