Search Results - "Jepsen, Peter U"

Impact ionization dynamics in silicon by MV/cm THz fields by Tarekegne, Abebe T, Hirori, Hideki, Tanaka, Koichiro, Iwaszczuk, Krzysztof, Jepsen, Peter U

“…We investigate the dynamics of the impact ionization (IMI) process in silicon in extremely high fields in the MV/cm range and at low initial carrier…”
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Graphene mobility mapping by Buron, Jonas D., Pizzocchero, Filippo, Jepsen, Peter U., Petersen, Dirch H., Caridad, José M., Jessen, Bjarke S., Booth, Timothy J., Bøggild, Peter

“…Carrier mobility and chemical doping level are essential figures of merit for graphene and large-scale characterization of these properties and their…”
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Terahertz wafer-scale mobility mapping of graphene on insulating substrates without a gate by Buron, Jonas D, Mackenzie, David M A, Petersen, Dirch H, Pesquera, Amaia, Centeno, Alba, Bøggild, Peter, Zurutuza, Amaia, Jepsen, Peter U

“…We demonstrate wafer-scale, non-contact mapping of essential carrier transport parameters, carrier mobility (µdrift), carrier density (Ns), DC sheet…”
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Impact ionization in high resistivity silicon induced by an intense terahertz field enhanced by an antenna array by Tarekegne, Abebe T, Iwaszczuk, Krzysztof, Zalkovskij, Maksim, Strikwerda, Andrew C, Jepsen, Peter U

“…We report on the observation of ultrafast impact ionization and carrier generation in high resistivity silicon induced by intense subpicosecond terahertz…”
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Electrical Homogeneity Mapping of Epitaxial Graphene on Silicon Carbide by Whelan, Patrick R, Panchal, Vishal, Petersen, Dirch H, Mackenzie, David M. A, Melios, Christos, Pasternak, Iwona, Gallop, John, Østerberg, Frederik W, U. Jepsen, Peter, Strupinski, Wlodek, Kazakova, Olga, Bøggild, Peter

“…Epitaxial graphene is a promising route to wafer-scale production of electronic graphene devices. Chemical vapor deposition of graphene on silicon carbide…”
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Mapping nanoscale carrier confinement in polycrystalline graphene by terahertz spectroscopy by Whelan, Patrick R., De Fazio, Domenico, Pasternak, Iwona, Thomsen, Joachim D., Zelzer, Steffen, Mikkelsen, Martin O., Booth, Timothy J., Diekhöner, Lars, Sassi, Ugo, Johnstone, Duncan, Midgley, Paul A., Strupinski, Wlodek, Jepsen, Peter U., Ferrari, Andrea C., Bøggild, Peter

“…Terahertz time-domain spectroscopy (THz-TDS) can be used to map spatial variations in electrical properties such as sheet conductivity, carrier density, and…”
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THz Wireless Transmission Systems Based on Photonic Generation of Highly Pure Beat-Notes by Jia, Shi, Yu, Xianbin, Hu, Hao, Yu, Jinlong, Morioka, Toshio, Jepsen, Peter U., Oxenlowe, Leif K.

“…In this paper, a terahertz (THz) wireless communication system at 400 GHz with various modulation formats [on-off keying (OOK), quadrature phase-shift keying…”
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Bottom‐Up‐Etching‐Mediated Synthesis of Large‐Scale Pure Monolayer Graphene on Cyclic‐Polishing‐Annealed Cu(111) by Yao, Wenqian, Zhang, Jianing, Ji, Jie, Yang, He, Zhou, Binbin, Chen, Xin, Bøggild, Peter, Jepsen, Peter U., Tang, Jilin, Wang, Fuyi, Zhang, Li, Liu, Jiahui, Wu, Bin, Dong, Jichen, Liu, Yunqi

“…Synthesis of large‐scale single‐crystalline graphene monolayers without multilayers involves the fabrication of proper single‐crystalline substrates and the…”
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Fourier-transform THz spectroscopy based on electric-field interferometry using THz-PMT by Takahashi, Hisanari, Buchmann, Tobias O, Sebek, Matej, Lange, Simon J, Kawai, Naoya, Katsuyama, Kota, Nagumo, Ken, Jepsen, Peter U, Omura, Takayuki, Satozono, Hiroshi

“…We demonstrate a high dynamic range (DR) Fourier-transform-based terahertz (THz) spectrometer by combining a THz photomultiplier tube (PMT) with a metasurface…”
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120 Gb/s Multi-Channel THz Wireless Transmission and THz Receiver Performance Analysis by Shi Jia, Xianbin Yu, Hao Hu, Jinlong Yu, Morioka, Toshio, Jepsen, Peter U., Oxenlowe, Leif K.

“…A photonic multi-channel terahertz (THz) wireless transmission system in the 350-475 GHz band is experimentally demonstrated. The employment of six THz…”
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Reference-free THz-TDS conductivity analysis of thin conducting films by Whelan, Patrick R., Shen, Qian, Luo, Da, Wang, Meihui, Ruoff, Rodney S., Jepsen, Peter U., Bøggild, Peter, Zhou, Binbin

“…We present a reference-free method to determine electrical parameters of thin conducting films by steady state transmission-mode terahertz time-domain…”
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Conductivity mapping of graphene on polymeric films by terahertz time-domain spectroscopy by Whelan, Patrick R, Huang, Deping, Mackenzie, David, Messina, Sara A, Li, Zhancheng, Li, Xin, Li, Yunqing, Booth, Timothy J, Jepsen, Peter U, Shi, Haofei, Bøggild, Peter

“…Fast inline characterization of the electrical properties of graphene on polymeric substrates is an essential requirement for quality control in industrial…”
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Nitrogen plasma formation through terahertz-induced ultrafast electron field emission by Iwaszczuk, Krzysztof, Zalkovskij, Maksim, Strikwerda, Andrew C., Jepsen, Peter U.

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Graphene Conductance Uniformity Mapping by Buron, Jonas D, Petersen, Dirch H, Bøggild, Peter, Cooke, David G, Hilke, Michael, Sun, Jie, Whiteway, Eric, Nielsen, Peter F, Hansen, Ole, Yurgens, August, Jepsen, Peter U

“…We demonstrate a combination of micro four-point probe (M4PP) and non-contact terahertz time-domain spectroscopy (THz-TDS) measurements for centimeter scale…”
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Towards intense ultra-broadband high repetition rate terahertz sources based on organic crystals [Invited] by Mansourzadeh, Samira, Vogel, Tim, Omar, Alan, Buchmann, Tobias O., Kelleher, Edmund J. R., Jepsen, Peter U., Saraceno, Clara J.

“…Increasing the average power of broadband, few-cycle terahertz (THz) sources is currently a topic of intense investigation, fueled by recent immense progress…”
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Bottom‐Up‐Etching‐Mediated Synthesis of Large‐Scale Pure Monolayer Graphene on Cyclic‐Polishing‐Annealed Cu(111) (Adv. Mater. 8/2022) by Yao, Wenqian, Zhang, Jianing, Ji, Jie, Yang, He, Zhou, Binbin, Chen, Xin, Bøggild, Peter, Jepsen, Peter U., Tang, Jilin, Wang, Fuyi, Zhang, Li, Liu, Jiahui, Wu, Bin, Dong, Jichen, Liu, Yunqi

“…Single‐Crystal Foils In article number 2108608, Bin Wu, Jichen Dong, Yunqi Liu, and co‐workers report the development of a cyclic electrochemical polishing and…”
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Lightwave‐Driven Long‐Wavelength Photomultipliers (Laser Photonics Rev. 18(1)/2024) by Lange, Simon J., Buchmann, Tobias O., Sebek, Matej, Welsch, Malte L., Kelleher, Edmund J. R., Kawai, Naoya, Takahashi, Hisanari, Katsuyama, Kota, Jepsen, Peter U.

“…Lightwave‐Driven Long‐Wavelength Photomultipliers In article number 2300417, Simon J. Lange and colleagues present a metasurface‐based photomultiplier tube for…”
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Electrically Continuous Graphene from Single Crystal Copper Verified by Terahertz Conductance Spectroscopy and Micro Four-Point Probe by Buron, Jonas D, Pizzocchero, Filippo, Jessen, Bjarke S, Booth, Timothy J, Nielsen, Peter F, Hansen, Ole, Hilke, Michael, Whiteway, Eric, Jepsen, Peter U, Bøggild, Peter, Petersen, Dirch H

“…The electrical performance of graphene synthesized by chemical vapor deposition and transferred to insulating surfaces may be compromised by extended defects,…”
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Lightwave‐Driven Long‐Wavelength Photomultipliers by Lange, Simon J., Buchmann, Tobias O., Sebek, Matej, Welsch, Malte L., Kelleher, Edmund J. R., Kawai, Naoya, Takahashi, Hisanari, Katsuyama, Kota, Jepsen, Peter U.

“…A novel lightwave‐driven detector that combines photomultiplier tube (PMT) technology with structured metasurfaces is presented to enable efficient detection…”
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400-GHz Wireless Transmission of 60-Gb/s Nyquist-QPSK Signals Using UTC-PD and Heterodyne Mixer by Xianbin Yu, Asif, Rameez, Piels, Molly, Zibar, Darko, Galili, Michael, Morioka, Toshio, Jepsen, Peter U., Oxenlowe, Leif K.

“…We experimentally demonstrate an optical network compatible high-speed optoelectronics THz wireless transmission system operating at 400-GHz band. In the…”
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