Electromagnetic wave oscillator, plasma wave power extractor and electromagnetic wave detector

Patent metadata

Field	Value
Publication number	US-10161804-B2
Application number	US-201415306927-A
Country	US
Kind code	B2
Filing date	Dec 30, 2014
Priority date	Dec 30, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

An electromagnetic wave generator includes a 2DEG plate, a first resistor, a second resistor, a source and a floating plate and a dielectric body. The 2DEG plate is configured to form a 2DEG channel. The first resistor is connected to one side node of the 2DEG plate. The second resistor is connected to an opposite side node of the 2DEG plate. The source is disposed between the second resistor and a ground and configured to apply electric power to the 2DEG plate. The floating plate is configured to generate an electromagnetic wave using electric dipoles formed by the 2DEG channel. The dielectric body is formed between the 2DEG plate and the floating plate.

First claim

What is claimed is:

1. An electromagnetic wave generator, comprising:
a 2DEG (two-dimensional electron gas) plate configured to form a 2DEG channel;
a first resistor directly connected to one side node of the 2DEG plate and a ground, respectively;
a second resistor whose one end is directly connected to an opposite side node of the 2DEG plate;
a source directly and serially connected to the other end of the second resistor and the ground and configured to apply electric power to the 2DEG plate;
a floating plate configured to generate an electromagnetic wave using electric dipoles formed by the 2DEG channel; and
a dielectric body formed between the 2DEG plate and the floating plate.

2. The electromagnetic wave generator of claim 1 , wherein the source is a voltage source or a current source, and the 2DEG channel is controlled by the source so that a longitudinal plasma wave is generated in the 2DEG plate.

3. The electromagnetic wave generator of claim 1 , wherein a boundary condition is such that the first resistor with zero impedance forms a short circuit and the second resistor with infinite impedance forms an open circuit.

4. The electromagnetic wave generator of claim 3 , wherein a longitudinal plasma wave generated in the 2DEG plate is amplified by the boundary condition.

5. The electromagnetic wave generator of claim 1 , wherein the dielectric body is vacuum or boron nitride.

6. The electromagnetic wave generator of claim 1 , wherein the 2DEG plate is made of graphene or MoS2.

7. The electromagnetic wave generator of claim 1 , wherein the floating plate is a conductor or a semiconductor.

8. The electromagnetic wave generator of claim 1 , wherein the electromagnetic wave is a TEM (transverse electromagnetic) wave of a terahertz band.

9. The electromagnetic wave generator of claim 1 , wherein the floating plate includes a plurality of floating plates positioned above an upper surface of the 2DEG plate or below a lower surface of the 2DEG plate.

10. The electromagnetic wave generator of claim 1 , wherein the 2DEG plate, the dielectric body and the floating plate define a generator unit together,
wherein the generator unit includes a plurality of generator units, the first resistor includes a plurality of first resistors, and the second resistor includes a plurality of second resistors,
wherein the first resistors, the generator units, and the second resistors are serially-connected with each other,
wherein one side node of the first one of the serially-connected first resistors is grounded, and
the source is connected to the other side node of the last one of the serially-connected second resistors.

11. The electromagnetic wave generator of claim 1 , wherein the floating plate has at least one recess portion perpendicular to a longitudinal direction of the 2DEG plate.

12. The electromagnetic wave generator of claim 1 , wherein the floating plate includes at least one unit plate, the unit plate includes a strip portion and a patch portion, the strip portion has a width smaller than a width of the patch portion, and the strip portion has a length larger than a length of the patch portion.

13. A plasma wave power extractor, comprising:
a 2DEG (two-dimensional electron gas) plate configured to form a 2DEG channel;
a first resistor directly connected to one side node of the 2DEG plate and a ground, respectively;
a second resistor whose one end is directly connected to an opposite side node of the 2DEG plate;
a source directly and serially connected to the other end of the second resistor and the ground and configured to apply electric power to the 2DEG plate; and
an extractor directly connected to the one end of the second resistor and the opposite side node of the 2DEG plate, respectively, and configured to extract electric power from a drain node between the 2DEG plate and the second resistor when a plasma wave is formed in the 2DEG plate by the source.

14. An electromagnetic wave detector, comprising:
a floating plate on which an electromagnetic wave is irradiated to form electric dipoles;
a 2DEG (two-dimensional electron gas) plate in which a 2DEG channel is formed by the electric dipoles to detect a 2DEG resonance;
a first resistor directly connected to one side node of the 2DEG plate and a ground, respectively;
a second resistor whose one end is directly connected to an opposite side node of the 2DEG plate;
a source directly and serially connected to the other end of the second resistor and the ground and configured to apply electric power to the 2DEG plate; and
a dielectric body formed between the 2DEG plate and the floating plate.

15. The electromagnetic wave detector of claim 14 , wherein the floating plate includes a plurality of floating plates positioned above an upper surface of the 2DEG plate or below a lower surface of the 2DEG plate.

16. The electromagnetic wave detector of claim 14 , wherein the 2DEG plate, the dielectric body and the floating plate define a generator unit together,
wherein the generator unit includes a plurality of generator units, the first resistor includes a plurality of first resistors, and the second resistor includes a plurality of second resistors,
wherein the first resistors, the generator units and the second resistors are serially-connected with each other,
wherein one side node of the first one of the serially-connected first resistors is grounded, and
the source is connected to the other side node of the last one of the serially-connected second resistors.

17. The electromagnetic wave detector of claim 14 , wherein the floating plate has at least one recess portion perpendicular to a longitudinal direction of the 2DEG plate.

18. The electromagnetic wave detector of claim 14 , wherein the floating plate includes at least one unit plate, the unit plate includes a strip portion and a patch portion, the strip portion has a width smaller than a width of the patch portion, and the strip portion has a length larger than a length of the patch portion.

Assignees

• Ulsan Nat Inst Science & Tech Unist
• Korea Advanced Inst Sci & Tech

Inventors

• Kim Kyung Rok
• Park Jong Ryul
• Kim Sung Ho
• Lee Sang Gug

Classifications

• G01J5/22 Primary

  Electrical features thereof · CPC title

• H03B9/08 Primary

  using a travelling-wave tube · CPC title

• H05H1/46

  using applied electromagnetic fields, e.g. high frequency or microwave energy (H05H1/26 takes precedence) · CPC title

• H01L29/1606

  Electricity · mapped topic

• H05H2001/4607

  Electricity · mapped topic