Ultra-broadband depolarization based on directly-coupled quantum wire-to-well modulation and their aliasing effect for polarization-insensitive light-emitting diodes

Abstract

Nowadays, the strained quantum structures have been widely used in various light-emitting devices with a variety of compounds for progressive applications. However, the lattice mismatch-induced strains in the materials would...

Realization of temperature-insensitive energy band-gap based on nanowire-well quantum systems for thermally frequency-stable laser diodes

“…In view of the above considerations, we propose a novel approach and mechanism to overcome band-gap variation with respect to temperature, based on a kind of self-organized nanowire-well-bound quantum structure that has recently been proposed by our group. 22–24 This new material structure exhibits many interesting properties that differ from traditional pure quantum-confined structures (well, wires or dots), as observed in our previous work, such as super-gain spectra, high characteristic temperature, and polarization insensitivity. 22–24 In the latest research presented here, we noticed the constraint effect of nanowires on the well.…”

“…22–24 This new material structure exhibits many interesting properties that differ from traditional pure quantum-confined structures (well, wires or dots), as observed in our previous work, such as super-gain spectra, high characteristic temperature, and polarization insensitivity. 22–24 In the latest research presented here, we noticed the constraint effect of nanowires on the well. Since the nanowires are subject to multiaxial compressive stresses, their lattice thermal-dilatation is effectively alleviated in high-temperature environments, which further restricts their temperature-dependent variation in band-gap.…”

“…Following the structural design described in ref. 22–24, a nanowire-well-bound quantum structure was fabricated in our experiment, as exhibited in the schematic diagram of Fig. 1(a).…”

“…27,28 These structural characterization results are consistent with the characterization data of a sample we prepared previously using the same method. 22–24…”

Absorption loss properties and Stokes shifts of InGaAs-based self-assembled well-wire-hybrid quantum structures

“…Some studies also paid an attention to the Stokes shift alteration with temperatures and material compositions, etc [14,15]. So far, we have not seen any research reports revealing the polarized Stokes shift in the newly-proposed InGaAs-based well-wire-hybrid (WWH) quantum structure [16][17][18].…”