Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Kawamura, Jonathan"'
Autor:
Heirwegh, Christopher M., Elam, William Timothy, Liu, Yang, Das, Anusheela, Hummel, Christopher, Naylor, Bret, Wade, Lawrence A., Allwood, Abigail C., Hurowitz, Joel A., Armstrong, Les G., Bacop, Naomi, O'Neil, Lauren P., Sinclair, Kimberly P., Sondheim, Michael E., Denise, Robert W., Lawson, Peter R., Rosas, Rogelio, Kawamura, Jonathan H., Au, Mitchell H., Kitiyakara, Amarit, Foote, Marc C., Romero, Raul A., Anderson, Mark S., Rossman, George R., Clark III, Benton C.
The Planetary Instrument for X-ray Lithochemistry (PIXL) is a rasterable focused-beam X-ray fluorescence (XRF) spectrometer mounted on the arm of National Aeronautics and Space Administration's (NASA) Mars 2020 Perseverance rover. To ensure that PIXL
Externí odkaz:
http://arxiv.org/abs/2402.01544
Autor:
Yoo, Changyun, West, Kenneth W., Pfeiffer, Loren N., Curwen, Chris A., Kawamura, Jonathan H., Karasik, Boris S., Sherwin, Mark S.
We present a reliable flip-chip technique for dual-side processing of thin (<1 micron) high-mobility GaAs/AlGaAs epitaxial layers. The technique allows the fabrication of small (micron-scale with standard UV photolithography) patterned back gates and
Externí odkaz:
http://arxiv.org/abs/2302.11057
Autor:
Yoo Changyun, Sherwin Mark S., West Kenneth W., Pfeiffer Loren N., Kawamura Jonathan H., Karasik Boris S.
Publikováno v:
Nanophotonics, Vol 13, Iss 10, Pp 1711-1723 (2024)
We investigate the THz intersubband absorption behavior of a single 40-nm wide GaAs/AlGaAs square quantum well (QW) using Johnson noise thermometry. In our measurements, the Johnson noise associated with intersubband absorption is measured from the i
Externí odkaz:
https://doaj.org/article/4808b3f5bfb74ed9a9f63cfd787671b3
Autor:
Shahili Mohammad, Addamane Sadhvikas J., Kim Anthony D., Curwen Christopher A., Kawamura Jonathan H., Williams Benjamin S.
Publikováno v:
Nanophotonics, Vol 13, Iss 10, Pp 1735-1743 (2024)
Design strategies for improving terahertz (THz) quantum cascade lasers (QCLs) in the 5–6 THz range are investigated numerically and experimentally, with the goal of overcoming the degradation in performance that occurs as the laser frequency approa
Externí odkaz:
https://doaj.org/article/eb4a04ead89341b0b1bd5f062c3fdcfb
Autor:
Yoo, Changyun, Huang, Mengchen, Kawamura, Jonathan, West, Kenneth, Pfeiffer, Loren, Karasik, Boris, Sherwin, Mark
A fast, voltage-tunable terahertz mixer based on the intersubband transition of a high-mobility 2-dimensional electron gas (2DEG) has been fabricated from a single 40 nm GaAs-AlGaAs square quantum well heterostructure. The device is called a Tunable
Externí odkaz:
http://arxiv.org/abs/1910.01664
Autor:
Seo, Young Min, Goldsmith, Paul F., Walker, Chris, Hollenbach, David J., Wolfire, Mark G., Kulesa, Craig, Tolls, Volker, Bernasconi, Pietro N., Kavak, Umit, van der Tak, Floris F. S., Shipman, Russ, Gao, Jian Rong, Tielens, Alexander, Burton, Michael G., Yorke, Harold, Young, Erick, Peters, William L., Young, Abram, Groppi, Christopher, Davis, Kristina, Pineda, Jorge L., Langer, William D., Kawamura, Jonathan H., Stark, Antony, Melnick, Gary, Rebolledo, David, Wong, Graeme F., Horiuchi, Shinji, Kuiper, Thomas B.
We present observations of the Trumpler 14/Carina I region carried out using the Stratospheric Terahertz Observatory 2 (STO2). The Trumpler 14/Carina I region is in the west part of the Carina Nebula Complex, which is one of the most extreme star-for
Externí odkaz:
http://arxiv.org/abs/1903.09517
Autor:
Gautam, Nutan, Kawamura, Jonathan, Chahat, Nacer, Karasik, Boris, Focardi, Paolo, Gulkis, Samuel, Pfeiffer, Loren, Sherwin, Mark
We report on the development of a tunable antenna coupled intersubband terahertz (TACIT) detector based on GaAs/AlGaAs two dimensional electron gas. A successful device design and micro-fabrication process have been developed which maintain the high
Externí odkaz:
http://arxiv.org/abs/1410.5344
We present a fully sampled map covering the Orion Hot Core and dense molecular ridge, in the sub-millimeter J=6-5 rotational transition of 13CO, at 0.45 mm with a resolution of 13 arcsec and 0.5 km s^-1. The map covers 3 arc min by 2arc min . The pro
Externí odkaz:
http://arxiv.org/abs/1012.2317
Autor:
Li, Hua-bai, Blundell, Raymond, Hedden, Abigail, Kawamura, Jonathan, Paine, Scott, Tong, Edward
Recent observational evidence that magnetic fields are dynamically important in molecular clouds, compared to self-gravity and turbulence, is reviewed and illustrated with data from the NGC 2024 region. One piece of evidence, turbulence anisotropy, w
Externí odkaz:
http://arxiv.org/abs/1007.3312
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