Photonic power switch and method of controlling current flow in the photonic power switch and use of such photonic power switch
View Patent ↗Photonic power switch and method of controlling current flow in the photonic power switch, the photonic power switch comprising an avalanche photo diode installed on a switch element, the switch element comprising a carrier donor layer and a channel layer. Photons are injected in the avalanche photo diode for generating electrical charge carriers by photoeffect, and the generated charge carriers are accelerated the by an electric field so as to produce an avalanche effect and are injected from the avalanche photo diode into the carrier donor layer of the switch element. A conduction layer built between the donor layer and the channel layer of the switch element is modulated, thereby modulating a current flow between a drain and a source of the power switch through said conduction layer.
1. An optically triggered photonic power switch comprising:
a switch element; and
an avalanche photo diode disposed on the switch element, wherein
the switch element is a high electron mobility transistor (HEMT) and includes a carrier donor layer and a channel layer,
the avalanche photo diode includes an absorption layer, the absorption layer being configured to generate by photoeffect, accelerated charge carriers, and
the switch element is configured to generate a conduction layer between the carrier donor layer and the channel layer, that contains a two dimensional electron gas (2DEG) that is modulated in response to inputting said accelerated charge carriers into said conduction layer to trigger the switch.
2. The photonic power switch of claim 1 , wherein at least one layer between the avalanche photo diode and the switch element is a resistive element.
3. A method of controlling current flow in a photonic power switch, the photonic power switch comprising an avalanche photo diode installed on a high electron mobility transistor (HEMT) acting as a switch element, the switch element comprising a carrier donor layer and a channel layer, the method comprising
injecting photons in the avalanche photo diode for generating electrical charge carriers by photoeffect,
accelerating the generated charge carriers by an electric field so as to produce an avalanche effect,
injecting the accelerated charge carriers from the avalanche photo diode into the carrier donor layer of the switch element, and
modulating a two-dimensional electron gas (2DEG) in a conduction layer built between the donor layer and the channel layer of the switch element in response to the injecting of the accelerated charge carriers, thereby modulating a current flow between a drain and a source of the power switch through said conduction layer.
4. The method of claim 3 further comprising the step of providing an impendence by means of a resistive element present in at least one layer between the avalanche photo diode and the switch element.
5. Use of the photonic power switch of claim 1 in radio frequency applications.
6. Use according to claim 5 wherein such use is in radio over fiber.