In: Applied Physics B: Lasers and Optics, 2010, vol. 103, no. 4, p. 967-970
We report a prototype CO2 gas sensor based on a simple blackbody infrared source and a spectrally narrow quantum cascade detector (QCD). The detector absorption spectrum is centered at 2260 cm−1 (4.4 μm) and has a full width at half maximum of 200 cm−1 (25 meV). It covers strong absorption bands of two spectrally overlapping CO2 isotopomers, namely...
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In: Current Nanoscience, 2006, vol. 2, no. 4, p. 337-350
High Resolution Interference Microscopy (HRIM) is a technique that allows the characterization of amplitude and phase of electromagnetic wave-fields in the far-field with a spatial accuracy that corresponds to a few nanometers in the object plane. Emphasis is put on the precise determination of topological features in the wave-field, called phase singularities or vortices, which are spatial...
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In: Japanese Journal of Applied Physics, 1990, vol. 29, no. 7, p. 1307-1309
This paper reports the calculation and fabrication of periodic phase structures fan-out elements with a theoretical conversion efficiency close to 100 percent and perfect uniformity. An efficiency of 92 percent was measured for a smooth kinoform structure fabricated in photoresist by laser beam writing lithography.
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In: Japanese Journal of Applied Physics, 2007, vol. 46, no. 9B, p. 6458-6462
A concept of an array actuator that is used to control the tip–sample separation of cantilevers in a two-dimensional (2D) probe array scanning system is proposed in this article. The feasibility of the concept is demonstrated with a 10×10 array actuator with 500 µm xy-pitches. The array actuator is made by slicing a bulk piezoceramic block. The obtained maximum actuation of a single...
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In: Applied Optics, 1995, vol. 34, no. 26, p. 5996-6005
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In: Applied Optics, 1995, vol. 34, no. 14, p. 2540-2547
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In: Applied Optics, 1993, vol. 32, no. 14, p. 2526-2533
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In: Applied Optics, 1992, vol. 31, no. 26, p. 5716-5723
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In: Applied Optics, 1992, vol. 31, no. 26, p. 5706-5711
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In: Diffractive Optics and Micro-Optics (DOMO), 2000, p. 234-236
We present a comparison of three different technologies for the fabrication of micro-optical elements with arbitrary surfaces. We used direct laser writing, binary mask lithography incombination with reactive ion etching, and graytone lithography.
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