Pair-density-wave and s±ids\pm \mathrm{i}d superconductivity in a strongly coupled, lightly doped Kondo insulator

We investigate the large Kondo coupling limit of the Kondo-Heisenberg model on one- and two-dimensional lattices. Focusing on the possible superconducting states when slightly doping the Kondo insulator state, we identify different pairing modes to be most stable in different parameter regimes. Possibilities include uniform s-wave, pair-density-wave with momentum $\pi$ (in both one and two dimensions) and uniform $s\pm \mathrm{i}d_{x^2-y^2}$-wave (in two dimensions). We attribute these exotic pairing states to the presence of various pair-hopping terms with a "wrong" sign in the effective model, a mechanism that is likely universal for inducing pairing states with spatially modulated pair wavefunctions

Visible submicron microdisk lasers

The authors describe the performance of submicron microdisk lasers fabricated within InGaP/InGaAlP quantum well material working at room temperature. The smallest lasers, with diameters of approximately 600 nm, feature ultrasmall mode volumes and exhibit single mode operation at low threshold powers. Their small cavity volumes of approximately 0.03 µm^3 enable microdisk lasers to be used as spectroscopic sources. Here the authors demonstrate the fabrication and characterization of visible, monolithically fabricated, submicron microdisk lasers

Visible 2-Dimensional Photonic Crystal Laser

Visible 2-dimensional photonic crystal lasers were fabricated within membranes of InGaP/InGaAlP quantum well material emitting around 670nm. These red photonic crystal lasers with ultra-small mode volumes (~0.01μm^3) are ideally useful for spectroscopic sources

Visible 2-dimentional Photonic Crystal Laser

Visible 2-dimentional photonic crystal lasers were fabricated within membranes of InGaP/InGaAlP quantum well material emitting around 670 nm. These red photonic crystal lasers with ultra-small mode volumes (~0.01μm3) are ideally useful for spectroscopic sources

Visible microdisk and photonic crystals lasers based on InGaP/InGaAlP system

We describe the performance of submicron microdisk and photonic crystal lasers fabricated within InGaP/InGaAlP quantum well material. The smallest lasers, with diameters of approximately 600 nm, feature ultra-small mode volumes and exhibit single mode operation at low threshold powers. Their small cavity volumes of approximately 0.03 μm^3 for microdisk lasers and 0.01 μm^3 for photonic crystal lasers enable them to be used as spectroscopic sources. Here we demonstrate the fabrication and characterization of visible, monolithically fabricated, submicron mode volume lasers