Terahertz imaging system using high-Tc superconducting oscillation devices
M. Tsujimoto, H. Minami, K. Delfanazari, M. Sawamura, R. Nakayama, T. Kitamura, T. Yamamoto, T. Kashiwagi, T. Hattori, and K. Kadowaki
Microwatt power oscillation devices at sub-terahertz frequency region were fabricated and used as a source of a transmission terahertz imaging system. Test images are presented where the signal-to-noise ratio exceeds 130. This interferometer provides a simple method to measure the absorption coefficient of a liquid sample, suggesting many practical applications, such as biological and biomedical imaging, environmental monitoring, microanalysis of impurities, structure and dynamical analyses of large molecules and ions in solution.
J. Appl. Phys. 111, 12311 (2012)
Charged exciton creation with two-color optical excitation method and analysis of initialization process of electron spin qubit in quantum dots
Hideki Gotoh, Haruki Sanada, Hiroshi Yamaguchi, and Tetsuomi Sogawa
An optical pumping method for creating charged excitons in semiconductor quantum dots is studied using a micro-photoluminescence (PL) technique with a two-color excitation method. This method employs two laser sources whose energies are in the resonant and non-resonant barrier excitation conditions, respectively; one laser creates excitons, the other creates electrons. Experimental results are analyzed theoretically based on the use of a density matrix method for the initialization. The analysis reveals that the electron spin in quantum dots is sufficiently polarized for subsequent quantum computation processes.
J. Appl. Phys. 111, 123520 (2012)
High optical quality polycrystalline indium phosphide grown on metal substrates by metalorganic chemical vapor deposition
Maxwell Zheng, Zhibin Yu, Tae Joon Seok, Yu-Ze Chen, Rehan Kapadia, Kuniharu Takei, Shaul Aloni, Joel W. Ager, Ming Wu, Yu-Lun Chueh, and Ali Javey
III–V semiconductor solar cells have demonstrated the highest power conversion efficiencies to date. However, the cost of III-V solar cells has historically been too high to be practical outside of specialty applications. This stems from the cost of raw materials, need for a lattice-matched substrate for single-crystal growth, and complex epitaxial growth processes. To address these challenges, here, we explore the direct non-epitaxial growth of thin poly-crystalline films of III-Vs on metal substrates by using metalorganic chemical vapor deposition.
J. Appl. Phys. 111, 123112 (2012)
More Research Highlights
The international conference on the Study of Matter at Extreme Conditions (SMEC 2011) was held during 27 March to 2 April on a cruise ship which sailed from the port of Miami to Belize and Mexico. In addition, SMEC 2011 was hosted by the High Pressure Science Society of America (HiPSSA) and the Center for the Study of Matter at Extreme Conditions (CeSMEC) of Florida International University (FIU) and was the sixth in the series of SMEC meetings. The meeting was organized under twenty four different themes and subject matter ranged from planetary interiors, technologically important advanced materials, and biological systems.
The invited papers from the 6th Meeting of the Study of Matter at Extreme Conditions (SMEC) are now available.
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Preface to Special Topic: Selected Papers from the International Conference on the Study of Matter at Extreme Conditions, SMEC 2011
Jiuhua Chen, Haozhe Liu, and Naurang L. Saini
J. Appl. Phys. 111, 112501 (2012)
Preface to the International Symposium on Integrated Functionalities (ISIF 2010) Special Issue of Journal of Applied Physics Science and Technology of Integrated Functionalities
Ram Katiyar, Orlando Auciello, and Reji Thomas
J. Appl. Phys. 111, 102701 (2012)
Waveguide terahertz time-domain spectroscopy of ammonium nitrate polycrystalline films
Ani Khachatrian, Joseph S. Melinger, and Syed B. Qadri
J. Appl. Phys. 111, 093103 (2012)
