A crystal radio is basically a high Q resonator tied to an antenna and an envelope detector. These days the envelope detector is a point contact diode such as a 1N34 Germanium diode. The resonant ...

Perhaps the simplest radio one can build is the crystal radio. Using a diode as a detector, the design generally uses less than 10 components and no battery, getting its power to run from the ...

The four-layer diode, also known as a Shockley Diode, is a crystal made of alternating layers of N- and P- type semiconductors. By putting in four layers, instead of the three used in transistors ...

Laser diodes are semiconductors that generate light and amplify it using repeated reflection or "optical feedback." Once the ...

Researchers at Harvard University recently observed an antiferromagnetic diode effect in even-layered MnBi 2 Te 4, an ...

This approach integrates p-type diamond with n-type ε-Ga 2 O 3 for fabricating power pn diodes. The heteroepitaxial n-type ε-Ga 2 O 3 film was grown on the p-type diamond single-crystal ...

LCD (Liquid Crystal Display) IPS-LCD (In-Plane Switching Liquid Crystal Display) OLED (Organic Light-Emitting Diode) AMOLED (Active-Matrix Organic Light-Emitting Diode) The screen, when combined ...

Photonic crystal surface-emitting lasers or PCSELs are laser diodes that generate laser beams through controlled light wave interaction within a photonic crystal structure. In a recent study, ...