Efficient terahertz sources by optical rectification in photonic crystals and metamaterials exploiting tailored transverse dispersion relations
First Claim
1. A system for generating terahertz (THz) radiation comprising a photonic crystal structure including at least one nonlinear material that enables optical rectification, said photonic crystal structure being configured to have the proper transverse dispersion relations and density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of said photonic crystal structure, said photonic crystal is configured to have a frequency range (Δ
- ω
) equal to 0.1% or more around some ω
Thz, such that the number of photonic states in the Δ
ω
is >
10 times larger or more than the number of photonic states the same frequency range would contain in the same, but unpatterned nonlinear material.
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Abstract
A system and a method for generating terahertz (THz) radiation are provided. The system includes a photonic crystal structure comprising at least one nonlinear material that enables optical rectification. The photonic crystal structure is configured to have the suitable transverse dispersion relations and enhanced density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of the photonic crystal.
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Citations
42 Claims
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1. A system for generating terahertz (THz) radiation comprising a photonic crystal structure including at least one nonlinear material that enables optical rectification, said photonic crystal structure being configured to have the proper transverse dispersion relations and density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of said photonic crystal structure, said photonic crystal is configured to have a frequency range (Δ
- ω
) equal to 0.1% or more around some ω
Thz, such that the number of photonic states in the Δ
ω
is >
10 times larger or more than the number of photonic states the same frequency range would contain in the same, but unpatterned nonlinear material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of producing terahertz (THz) radiation comprising:
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providing an optical or near infrared pulse; providing a photonic crystal structure comprising at least one nonlinear material that enables optical rectification; and configuring said photonic crystal structure to have the proper transverse dispersion relations and density photonic states so as to allow THz radiation to be emitted efficiently when said optical or near infrared pulse travels through the nonlinear part of the said photonic crystal structure, said photonic crystal is configured to have a frequency range (Δ
ω
) equal to 0.1% around some Δ
Thz, such that the number of photonic states in the Δ
ω
is >
10 times larger or more than the number of photonic states the same frequency range would contain in the same, but unpatterned nonlinear material. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of forming a terahertz (THz) radiation source comprising:
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forming a photonic crystal structure including at least one nonlinear material that enables optical rectification; and configuring said photonic crystal structure to have the proper transverse dispersion relations and density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of the said photonic crystal structure, said photonic crystal is configured to have a frequency range (Δ
ω
) equal to 0.1% around some ω
Thz, such that the number of photonic states in the Δ
ω
is >
10 times larger or more than the number of photonic states the same frequency range would contain in the same, but unpatterned nonlinear material. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification