Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Maik Scheller"'
Autor:
Björn Breitenstein, Maik Scheller, Mohammad Khaled Shakfa, Thomas Kinder, Thomas Müller-Wirts, Martin Koch, Dirk Selmar
Publikováno v:
Journal of Applied Botany and Food Quality, Vol 84, Iss 2 (2012)
We present a novel, non-destructive method for determination of changes in leaf water content in the fi eld based on terahertz (THz) technology. In this method, terahertz waves, which are strongly absorbed by water, are generated and detected using a
Externí odkaz:
https://doaj.org/article/f49a58bc18d54230aaedf409a4637d6f
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves. 40:158-165
We investigate the angular dependence of electro-optic sampling of terahertz radiation. We show that a non-perpendicular incident of copropagating terahertz and optical waves onto the electro-optic crystal only weakly influences the resulting electro
Autor:
Arash Rahimi-Iman, Maik Scheller, Ksenia A. Fedorova, Heyang Guoyu, Martin Koch, Wolfgang Stolz, Matthias Wichmann, Fan Zhang, Christian Kriso
Publikováno v:
physica status solidi (RRL) – Rapid Research Letters
Publikováno v:
IEEE Photonics Technology Letters. 29:790-793
A vertical external-cavity surface-emitting laser is presented that emits 2.6 W of continuous-wave radiation centered at 1015 nm. The emission consists of a two-color spectrum with a difference frequency in the terahertz regime. The stability of the
Autor:
Antje Ruiz-Perez, Alexandre Laurain, Caleb W. Baker, Ganesh Balakrishnan, Wolfgang Stolz, R. Jason Jones, Maik Scheller, Stephan W. Koch, Jerome V. Moloney, Sadhvikas Addamane
Publikováno v:
IEEE Photonics Technology Letters. 29:326-329
We present a novel cavity design for vertical external cavity surface emitting lasers (VECSELs) enabling multiple interactions with the gain structure under different angles in a single round trip. This allows for a low round-trip group delay dispers
Publikováno v:
2018 IEEE International Semiconductor Laser Conference (ISLC).
In this work, we discuss methods to adjust the beam divergence of vertical-cavity surface-emitting lasers (VCSELs) by controlling the transversal lasing modes using different epitaxial designs. We show results of high power, multi-watt VCSEL arrays w
Autor:
Jerome V. Moloney, Maik Scheller, Alexandre Laurain, Caleb W. Baker, S. W. Koch, Robert Rockmore, Sadhvikas Addamane, I. Kilen, Ganesh Balakrishnan, R. J. Jones
Publikováno v:
2018 IEEE International Semiconductor Laser Conference (ISLC).
We present state of the art results obtained with numerically optimized VECSEL devices for the generation of multi-Watts single frequency and multi-color operation in the near infrared as well as for the direct generation of sub-100fs modelocked puls
Autor:
Maik Scheller, Norman Born, Christian Jansen, Jerome V. Moloney, Martin Koch, Ranjan Singh, Ibraheem Al-Naib
Publikováno v:
Advanced Optical Materials. 3:642-645
A novel conceptual design methodology for strongly interacting metamaterials allows an ultrahigh angular sensitivity. Among others, this methodology enables precise sensing of the wave vector or the exclusion of unwanted directional radiation compone
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves. 36:318-326
A broadband terahertz (THz) reflection imaging system with high spatial resolution over a large depth of field is reported. A THz axicon lens producing a truncated THz Bessel beam with a linear focus exceeding 120 mm in length, and with the diameter
Publikováno v:
IEEE Photonics Technology Letters. 28:1325-1327
A dual-wavelength mode-locked semiconductor vertical-external-cavity-surface-emitting laser is demonstrated. A semiconductor saturable absorber mirror allows for simultaneous mode locking of pulses centered at two center wavelengths with variable fre