Lamellar grating

Figure 10.21. Profile of the lamellar grating designed by Strong and Vanesse [25] for a far-infrared Fourier transform spectrometer.

Figure 16.15 Excitation of SPGCE on periodically modulated lamellar grating nanostructure with SPPs propagation, (a) The SEM images of Au (40 nm), Alq3 (80 nm) and photoresist, PR, (100 nm) fabricated on silicon substrate, (b) The 3-D AFM images of PR-grating profiles with 500 nm pitch size.

Fig. 17. Lamellar grating with two interpenetrating sets of facets...

Fig. 18. Two-beam interferometer efficiencies of a Michelson interferometer with a thin-film mylar beam splitter —), witli a metal screen as beam splitter (- -), and with a lamellar grating (----). These data were taken from Ref.

Summarizing the results of our discussion of the practice of Fourier transform spectroscopy, we start with the presumption that the equipment for most routine spectroscopic investigations consists of a Fourier spectrometer with a Michelson interferometer and a digital computer. In other words, the advantages of the lamellar grating used as a two-beam interferometer, and of phase modulation, for example, have been utilized only for certain special applications in the extreme far-infrared. All commercial Fourier spectrometers are available with a computer attached, which in most cases not only performs the Fourier transform but is also programmed to control the instrument. Commercial instruments have a remote switch for the selection of the different spectral ranges, and the filters and beams... 

C. Minan, K. Nakamatsu, R. Kometani, K. Kanda, Y. Haruyama, and S. Matsui, Bakable Lamellar Grating Fabrication by Room-Temperature Nanoimprint Using Hydrogen SUsesquioxane (HSQ), in 5th International Nanoimprint and Nanoprint Technology Conference, San Francisco, 2006, p. 231. 

LAMELLAR GRATING INTERFEROMETRY AT 50y TO BEYOND 600y FROM THE GERARD P. KUIPER AIRBORNE OBSERVATORY... 

Four of the seven spectra secured with the new lamellar-grating interferometer have a spectral resolution better than 0.5 cm . This resolution allows the detection of a number of stratospheric molecular absorption lines (H2O, O2, O3). 

Haggans CW, Li L, Kostuk RK. (1993) Effective-medium theory of zeroth-order lamellar gratings in conical monnlin s. J Opt Soc Am A 10(10) 2217—2225. 

Figure 5.35. Principle of the lamellar grating interferometer. Radiation reflected from the movable facets travels a distance of Idicos a farther than the radiation reflected from the stationary (shaded) facets.

Figure 5.36. Comparison of the theoretical efficiency of a lamellar grating interferometer (1) and a Michelson interferometer equipped with a metal mesh beamsplitter (2) and a 100-pm PET beamsplitter (3). (Reproduced from [47], by permission of the Optical Society of America copyright 1964.)...

Fig. 5.8.17 Lamellar grating interferometers. The upper panel (A) shows the plane version. The lower panel (B) illustrates the spherical configuration.

In the spherical lamellar grating the surface at zero path difference has not a plane but a concave shape. This interferometer operates with a noncollimated beam and is, therefore, limited to lower spectral resolution than the plane version otherwise the spherical configuration is the most simple form of a lamellar grating instrument. Only a source and a detector need to be added adjacent to the center of curvature to form a working far infrared interferometer. 

Hansen, N. P. Strong, J. (1971). Performance of a simple spherical lamellar grating beamsplitter by wavefront division. Aspen International Conference on Fourier Spectroscopy, ed. G. A. Vanasse, A. T. Stair, Jr., D. J. Baker, US Air Force Cambridge Research Laboratory 71-0019. 

Hofmann, R., Drapatz, S., Michel, K. W. (1977). Lamellar grating Fourier spectrometer for balloon-borne telescope. Infrared Physics, 17,451-6. 

Strong, J. Vanasse, G. (1960). Lamellar grating far-infrared interferometer. Journal of... 

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