By a
The patent's assignee
for patent number 9041289 is SAMSUNG
ELECTRONICS CO., LTD. (Suwon -si,
KR).
News editors obtained
the following quote from the background information supplied by the inventors:
"Apparatuses and methods consistent with the present description relate to
electromagnetic wave circuits, and more particularly, to electromagnetic wave
circuits having a ridge structure.
"The terahertz
frequency band between a megahertz frequency band and an optical frequency band
is a frequency band used in fields such as molecular optics, biophysics,
medicine, spectroscopy, imaging, and security. However, in the related art, a
terahertz oscillator or a terahertz amplifier for generating terahertz waves
has not been developed due to physical and technological limitations. Recently,
a terahertz oscillator or amplifier has been developed due to various theories
and the development of fine-machining technology.
"In terahertz
oscillators or amplifiers, interaction circuits are employed for oscillating or
amplifying interaction between an electron beam and electromagnetic waves. The
interaction circuit may be used in various fields provided that the energy of
the electron beam is effectively converted into an electromagnetic wave and a
range of an operating frequency is wide."
As a supplement to the
background information on this patent, VerticalNews correspondents also
obtained the inventors' summary information for this patent: "According to
an aspect of an exemplary embodiment, there is provided a terahertz interaction
circuit including a waveguide having a folded shape and in which an
electromagnetic wave propagates; and an electron beam tunnel which is formed to
penetrate through the waveguide and through which an electron beam passes,
wherein the waveguide comprises a ridge portion in which at least a portion of
a surface of the waveguide protrudes into the waveguide.
"A thickness of a
portion of the waveguide at the ridge portion may be thinner than a thickness
of a portion of the waveguide at either side of the ridge portion.
"The waveguide may
have a periodically folded shape, and the electron beam tunnel may penetrate
through the ridge portion of the waveguide.
"The ridge
portion may be formed by protruding a center portion of a surface of the
waveguide into the waveguide.
"The waveguide
may have an I-shaped cross-section or a dumbbell cross-section.
"The waveguide
may include at least one of a first ridge portion that is formed by protruding
an upper center surface of the waveguide into the waveguide, and a second ridge
portion that is formed by protruding a lower center surface of the waveguide
into the waveguide.
"The ridge
portion may have a rectangular cross-section or a semi-circular cross-section.
The electron beam tunnel may have a square cross-section or a circular
cross-section.
"Inner surfaces
of the waveguide and the electron beam tunnel may be coated with a metal
material.
"According to
another aspect of an exemplary embodiment, there is provided a method of
fabricating a terahertz interaction circuit, the method including preparing a
first substrate; preparing a second substrate, on which a part of a waveguide
that has a folded shape and comprises a ridge portion and a part of an electron
beam tunnel penetrating through the waveguide are formed, for layering on the
first substrate; preparing a third substrate, on which the other part of the
waveguide and the other part of the electron beam tunnel are formed, for
layering on the second substrate; preparing a fourth substrate for layering on
the third substrate; and bonding the first through fourth substrates to each
other.
"The electron
beam tunnel may be formed to penetrate through the ridge portion of the
waveguide.
"The portion of
the waveguide on the sides of the ridge portion may be extended into bonding
surfaces of the first and fourth substrates.
"Bonding surfaces
of the first through fourth substrates and inner surfaces of the waveguide and
the electron beam tunnel may be coated with a metal layer.
"The first
through fourth substrates may include silicon."
For additional information
on this patent, see: Baik, Chan-wook; Ahn, Ho-young. Terahertz Interaction
Structure Including a Folded Waveguide with a Ridge Structure and Having an
Electron Beam Tunnel Passing through the Ridge Structure. U.S. Patent Number
9041289, filed March 28, 2011 , and published online on May
26, 2015 .
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