Print Email Facebook Twitter Beam and phase distributions of a terahertz quantum cascade wire laser Title Beam and phase distributions of a terahertz quantum cascade wire laser Author Cui, M. Hovenier, J.N. Ren, Y. Vercruyssen, N. Gao, J.R. Kao, T.Y. Hu, Q. Reno, J.L. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2013-03-22 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. Subject aluminium compoundsdiffraction gratingsdistributed feedback lasersgallium arsenidegallium compoundsIII-V semiconductorslaser beamslaser modeslaser stabilitylaser variables measurementoptical waveguidesquantum cascade lasersterahertz wave deviceswavefront sensors To reference this document use: http://resolver.tudelft.nl/uuid:646ad165-31e7-4b62-b74d-939b9d1173b4 DOI https://doi.org/10.1063/1.4798250 Publisher American Institute of Physics ISSN 0003-6951 Source https://doi.org/10.1063/1.4798250 Source Applied Physics Letters, 102 (11), 2013 Part of collection Institutional Repository Document type journal article Rights © 2013 American Institute of Physics Files PDF Hovenier 2013.pdf 1.68 MB Close viewer /islandora/object/uuid:646ad165-31e7-4b62-b74d-939b9d1173b4/datastream/OBJ/view