US 7,889,015 B2Granted

Oscillation device

AssigneeCanon Kabushiki Kaisha

InventorsRyota Sekiguchi, Toshihiko Ouchi

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Abstract

To provide an oscillation device having a long oscillation wavelength in which wavelength variable width is relatively broad and wavelength sweep rate is relatively high. An oscillation device includes a gain medium having a gain with respect to an electromagnetic wave to be oscillated, cavity structures for resonating the electromagnetic wave, and energy injection means and for injecting pumping energy into the gain medium. The gain medium is sandwiched between a first negative permittivity medium and a second magnetic permittivity medium each of which real part of permittivity with respect to the electromagnetic wave is negative. Electric field application means is provided for at least one of the first negative permittivity medium and the second negative permittivity medium to apply an electric field for changing a depletion region formed at a boundary part with the gain medium.

Claims5

Dependent claims

An oscillation device for oscillating an electromagnetic wave having a frequency selected from a frequency region from 30 GHz to 30 THz, comprising:

a first negative permittivity medium of which a real part of permittivity with respect to the electromagnetic wave is negative;
a second negative permittivity medium of which a real part of permittivity with respect to the electromagnetic wave is negative;
a gain medium sandwiched between the first negative permittivity medium and the second negative permittivity medium, and having a gain with respect to the electromagnetic wave;
a cavity structure for resonating the electromagnetic wave;
a drive electrode for injecting carriers into the gain medium to drive the gain medium;
and
a control electrode to change thickness of a depletion region formed between at least one of the first and second negative permittivity media and the gain medium for controlling oscillation wavelength, wherein the control electrode is configured to apply an electric potential independently of the drive electrode.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/091,393Filed 20 Dec 2007
Priority: JP 2006-34456521 Dec 2006
Published: US 2010/0164636 A11 Jul 2010
Granted: 15 Feb 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H01S 1/02
Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range: solid
B82Y 20/00
Nanooptics
H01S 5/06255
In multi-section lasers: controlling the frequency of the radiation
H01S 5/3402
Having no PN junction, e.g. unipolar lasers, intersubband lasers, quantum cascade lasers: intersubband lasers, e.g. transitions within the…