Beam and phase distributions of a terahertz quantum cascade wire laser
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Hu_Beam and phase.pdf
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1.68 MB
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Adobe PDF
Checksum (MD5)
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Author(s)
Cui, M.
Hovenier, J. N.
Ren, Y.
Vercruyssen, N.
Gao, J. R.
Reno, J. L.
Kao, Tsung-Yu
Hu, Qing
Date Issued
March 2013
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Cui, M., J. N. Hovenier, Y. Ren, N. Vercruyssen, J. R. Gao, T. Y. Kao, Q. Hu, and J. L. Reno. “Beam and Phase Distributions of a Terahertz Quantum Cascade Wire Laser.” Appl. Phys. Lett. 102, no. 11 (2013): 111113. © 2013 American Institute of Physics
Version
Final published version
Abstract
We report on both measurements and simulations of the beam profile and wavefront of a single-mode, 3.5 THz quantum cascade wire laser, incorporating a lateral corrugated metal-metal waveguide, 3rd-order distributed feedback grating. The intrinsic wavefront was measured by using a Hartmann wavefront sensor (HWS) without any optical components between the laser and HWS. Both beam profile and wavefront were simulated using an antenna array model, but taking the non-uniform electric field distribution along the waveguide into account. The results show that the non-uniform distribution along the wire laser plays a crucial role in realizing a nearly single-lobed narrow beam. The measured wavefront is spherical and agrees well with the simulation.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4798250
