Wurtzite spin lasers

Abstract

Semiconductor lasers are strongly altered by adding spin-polarized carriers. Such spin lasers could overcome many limitations of their conventional (spin-unpolarized) counterparts. While the vast majority of experiments in spin lasers employed zinc-blende semiconductors, the room temperature electrical manipulation was first demonstrated in wurtzite GaN-based lasers. However, the underlying theoretical description of wurtzite spin lasers is still missing. To address this situation, focusing on (In,Ga)N-based wurtzite quantum wells, we develop a theoretical framework in which the calculated microscopic spin-dependent gain is combined with a simple rate equation model. A small spin-orbit coupling in these wurtzites supports simultaneous spin polarizations of electrons and holes, providing unexplored opportunities to control spin lasers. For example, the gain asymmetry, as one of the key figures of merit related to spin amplification, can change the sign by simply increasing the carrier density. The lasing threshold reduction has a nonmonotonic depenedence on electron spin polarization, even for a nonvanishing hole spin polarization.

10 pages, 8 figures

References in corpus (8)

• What Makes Effective Gating Possible in Two-Dimensional Heterostructures?
• Determination of Interface Atomic Structure and Its Impact on Spin Transport Using Z-Contrast Microscopy and Density-Functional Theory
• First-principles studies of orbital and spin-orbit properties of GaAs, GaSb, InAs, and InSb zinc-blende and wurtzite semiconductors
• Analytical Model of Spin-Polarized Semiconductor Lasers
• Realistic multiband k.p approach from ab initio and spin-orbit coupling effects of InAs and InP in wurtzite phase
• Tailoring Chirp in Spin-Lasers
• Spin-polarized lasing in a highly photoexcited semiconductor microcavity
• Interband polarized absorption in InP polytypic superlattices

Cited by in corpus (12)

• Ultrafast spin-lasers
• Cubic spin-orbit coupling and anomalous Josephson effect in planar junctions
• Spin-Lasers: Spintronics Beyond Magnetoresistance
• Spin-orbit coupling effects in zinc-blende InSb and wurtzite InAs nanowires: Realistic calculations with multiband $\vec{k}\cdot \vec{p}$ method
• Common nonlinear features and spin-orbit coupling effects in the Zeeman splitting of novel wurtzite materials
• Unusual spin properties of InP wurtzite nanowires revealed by Zeeman splitting spectroscopy
• Spin relaxation in wurtzite nanowires
• Threshold behavior in spin lasers: Spontaneous emission and nonlinear gain
• Intensity equations for birefringent spin lasers
• Polarization response of spin-lasers under amplitude modulation
• Wurtzite quantum wires with strong spatial confinement: polarization anisotropies in single wire spectroscopy
• The birefringent spin-laser as a system of coupled harmonic oscillators