Spectroscopy and Laser Applications

A new stellar library developed for stellar population synthesis modelling is presented. The library consists of 985 stars spanning a large range in atmospheric parameters. The spectra were obtained at the 2.5-m Isaac Newton Telescope and cover the range λλ 3525–7500 Å at 2.3 Å (full width at half-maximum) spectral re…

• SELİM OSMAN SELAM

Compact solid-state sources of terahertz (THz) radiation are being sought for sensing, imaging, and spectroscopy applications across the physical and biological sciences. We demonstrate that coherent continuous-wave THz radiation of sizable power can be extracted from intrinsic Josephson junctions in the layered high-…

• LÜTFİ ÖZYÜZER

During the past decade, the application of ambient pressure photoemission spectroscopy (APPES) has been recognized as an important in situ tool to study environmental and materials science, energy related science, and many other fields. Several APPES endstations are currently under planning or development at the USA a…

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• ÜLFET ATAV

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• HALUK ŞAFAK

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• İBRAHİM KARABULUT

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• OSMAN BARIŞ MALCIOĞLU

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• MELİKE AFŞAR

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• LÜTFİ ÖZYÜZER

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Terahertz time-domain spectroscopy has been used to measure the absorption of water vapor in 0.2–2.4THz range from low to high humidity at room temperature. The observed absorption lines are due to the water molecular rotations in the ground vibrational state. We find that the absorption strength of para transitions i…

• HAKAN ALTAN

CO adsorption on a Pd(111) single-crystal surface was investigated using in situ polarization modulation infrared reflection absorption spectroscopy (PM-IRAS) within the pressure range 10 -6 −800 mbar. The coverage-dependent CO overlayer structures found on the Pd(111) surface are identical throughout this pressure re…

• EMRAH ÖZENSOY