Ionic carbon nitrides based on poly(heptazine imides) (PHI) represent a vigorously studied class of materials with possible applications in photocatalysis and energy storage. Herein, for the first time, photogenerated charge dynamics highly stable binder-free PHI photoanodes using operando transient photocurrents spectroelectrochemical photoinduced absorption measurements is studied. It discove...

4H-SiC complementary metal-oxide-semiconductor (CMOS) devices for control circuit applications have been reported extensively, however, the electrical stability, even with interface optimization processes, degrades significantly after bias stress. In this paper, we performed both positive and negative stress on planar SiC NMOSFETs PMOSFETs fabricated pure (non-diluted) N 2 -diluted NO post-oxid...

A novel AlGaInAs/InP electro-absorption modulated laser (EML) with a simple fabrication process is proposed, in which the modulator (EAM) has 10 nm blueshift induced by quantum well intermixing (QWI) and monolithically integrated sidewall grating distributed-feedback (DFB) working at 1.55 μm wavelength. The extent of QWI characterized diffusion length. confined Stark effect (QCSE) simulated ter...

Optical properties of multilayer InAs quantum dot waveguides, grown by molecular beam epitaxy, have been studied under applied electric field. Fabry-Perot measurements at 1515 nm on InAs/GaAs quantum dot structures yield a significantly enhanced linear electro-optic efficiency compared to bulk GaAs. Electro-absorption measurements at 1300 nm showed increased absorption with applied field accomp...

Using the S1/2Fg = 2 −→ P3/2Fe = 3 transition in Rb, we analyzed the interaction between the arbitrarily polarized laser light and Zeeman sublevels in the Hanle configuration. We studied theoretically and confirmed experimentally that the effect of the laser light polarization on the electromagnetically induced absorption strongly depends on the laser light power. For the same atomic transition...

Absorption recovery dynamics of GaAs/AlGaAs field-enhanced waveguide saturable absorbers-are studied by pump-probe differential transmission measurements. We c;ompare the response of-bulk and single quantum well absorbers at different reverse bias levels and pump powers, and find an ultrafast transient in the response, followed by a slower rise before the final recovery. The absorption fully re...