Cabinet ioda grenoble12/29/2023 Even in the field of optoelectronic sources, which has largely driven the growing interest in the mid-infrared, the inherent limitations of state-of-the-art sources and the gaps in spectral coverage offer opportunities for the development of new classes of lasers, light emitting diodes and emitters for a range of potential applications. However, optical systems designers still do not have the extensive optical infrastructure available to them that exists at shorter wavelengths (for instance, in the visible and near-IR/telecom wavelengths). The recent development and rapid commercialization of new coherent mid-infrared sources have spurred significant interest in the development of mid-infrared optical systems for the above applications. The mid-infrared ( mid-IR) is a wavelength range with a variety of technologically vital applications in molecular sensing, security and defense, energy conservation, and potentially in free-space communication. Extension to the mid-infrared range reveals an absorption peak at \ A detailed comparison of various conductivity models and previously reported results is presented for the non-Drude behaviour we observe in the conventional THz range (up to 2.5 THz). the response is predominantly due to polarisation perpendicular to the CNT axis. The nominally undoped, metallic VACNT samples are probed at normal incidence, i.e. We investigate the broadband dielectric properties of vertically aligned, multi-wall carbon nanotubes (VACNT), over both the terahertz (THz) and mid-infrared spectral ranges. Nicoloso, Norbert Rychetský, Ivan Kužel, Petr Roskos, Hartmut G. Rabia, Kaneez Heinlein, Thorsten Hussein, Laith Babu, Deepu Yadav, Sandeep Engstler, Jörg Schneider, Jörg J. Zouaghi, Wissem Meng, Fanqi Wiecha, Matthias M. The results show that: (1) obscured objects dominate the overall AGN population, (2) mid-infrared selected AGN candidates exist which lack AGN signatures in their optical spectra but have AGN-like X-ray or radio counterparts, and ( 3) X-ray and optical classifications of obscured and unobscured AGNs often differ.ĭielectric properties of vertically aligned multi-walled carbon nanotubes in the terahertz and mid-infrared range We also discuss the mid-infrared—emission-line luminosity correlation and present the results of cross correlations with serendipitous X-ray and radio sources. We present composite spectra for type 2 quasars and objects with no signs of AGN activity in their spectra. This survey selects both normal and obscured AGNs closely matched in luminosity across a wide range, from Seyfert galaxies with bolometric luminosities L, in the quasar regime. We present the results of a program of optical and near- infrared spectroscopic follow-up of candidate active galactic nuclei (AGNs) selected in the mid-infrared. [Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125 (United States) Box 76, Epping, NSW 1710 (Australia) Storrie-Lombardi, L. [Department of Astronomy, University of Michigan, Ann Arbor, MI 48109 (United States) Seymour, N. [946 Mangrove Avenue 102, Sunnyvale, CA 94086 (United States) Harrison, C. [Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, D-14482 Potsdam (Germany) Cox Drews, S. [Department of Physics and Astronomy, Tuffs University, 212 College Avenue, Medford, MA 02155 (United States) Urrutia, T. [Department of Astronomy, California Institute of Technology, Pasadena, CA 91125 (United States) Sajina, A. Charter Street, Madison, WI 53706 (United States) Petric, A. [Department of Astronomy, University of Wisconsin, 475 N. Box 85, Mount Hamilton, CA 95140 (United States) Nielsen, D. [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States) Gates, E. [National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903 (United States) Ridgway, S. OPTICAL AND NEAR- INFRARED SPECTROSCOPY OF OBSCURED CANDIDATES AND NORMAL ACTIVE GALACTIC NUCLEI SELECTED IN THE MID-INFRAREDĮnergy Technology Data Exchange (ETDEWEB) THE SPITZER MID-INFRARED ACTIVE GALACTIC NUCLEUS SURVEY. By changing the cavity length, a single mode hop free tuning range up to 80 cm-1 is achieved. Both devices are operated around - 20 Â☌ and have output power of several 10 mW. The active part consists of PbSe QW in a PbSrSe host layer. The devices are based on lead salt materials epitaxially grown by MBE on a Si substrate. Tunable mid-infrared vertical external cavity surface emitting lasers were developed for the wavelength range around 3.8-3.9 μm and 3.2-3.3 μm, respectively. Mid-Infrared Continuously Tunable Single Mode VECSEL
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