title: Subwavelength grating as both emission mirror and electrical contact for VCSELs in any material system.
abstract: Semiconductor-metal subwavelength grating (SMSG) can serve a dual purpose in vertical-cavity surface-emitting lasers (VCSELs), as both optical coupler and current injector. SMSGs provide optical as well as lateral current confinement, eliminating the need for ring contacts and lateral build-in optical and current confinement, allowing their implementation on arbitrarily large surfaces. Using an SMSG as the top mirror enables fabrication of monolithic VCSELs from any type of semiconductor crystal. The construction of VCSELs with SMSGs requires significantly less p-type material, in comparison to conventional VCSELs. In this paper, using a three-dimensional, fully vectorial optical model, we analyse the properties of the stand-alone SMSG in a number of semiconductor materials for a broad range of wavelengths. Integrating the optical model with thermal and electrical numerical models, we then simulate the threshold operation of an exemplary SMSG VCSEL.
authors.affiliation: Photonics Group, Institute of Physics, Lodz University of Technology, Wólczańska 219, 90-924 Łódź, Poland.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Czyszanowski
authors.affiliation: Photonics Group, Institute of Physics, Lodz University of Technology, Wólczańska 219, 90-924 Łódź, Poland.|Institute of Solid State Physics and Center of Nanophotonics, Technische Universität Berlin, Hardenbergstraße 36, D-10623 Berlin, Federal Republic of Germany.
authors.forename: Marcin
authors.initials: M
authors.lastname: Gebski
authors.affiliation: Photonics Group, Institute of Physics, Lodz University of Technology, Wólczańska 219, 90-924 Łódź, Poland.
authors.forename: Maciej
authors.initials: M
authors.lastname: Dems
authors.affiliation: Photonics Group, Institute of Physics, Lodz University of Technology, Wólczańska 219, 90-924 Łódź, Poland.
authors.forename: Michał
authors.initials: M
authors.lastname: Wasiak
authors.affiliation: Photonics Group, Institute of Physics, Lodz University of Technology, Wólczańska 219, 90-924 Łódź, Poland.
authors.forename: Robert
authors.initials: R
authors.lastname: Sarzała
authors.affiliation: Vrije Universiteit Brussel, Department of Applied Physics and Photonics, Brussels Photonics (B-PHOT), Pleinlaan 2, B-1050 Brussels, Belgium.|Institute of Solid State Physics, 1784 Sofia, Bulgaria.
authors.forename: Krassimir
authors.initials: K
authors.lastname: Panajotov