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THZ GENERATION
2025.02.21
Femtosecond lasers are capable of generating extremely short pulses that, when interacting with specific materials (such as photoconductors and semiconductors), can effectively produce terahertz waves. Moreover, femtosecond lasers can also be utilized for the detection of terahertz waves, based on the principle of analyzing the interaction outcomes between femtosecond laser pulses and terahertz waves to gather information. The high efficiency of femtosecond lasers in both generating and detecting terahertz waves provides greater flexibility and higher precision for the application of terahertz waves.
The application of terahertz waves in the non-destructive testing of packaging materials and clothing is particularly prominent. Due to their excellent penetrating ability, terahertz waves can detect objects that are packaged or concealed, such as weapons or contraband hidden beneath clothing during security checks. This capability makes terahertz waves an effective tool for security detection.
The use of femtosecond lasers has significantly enhanced the efficiency of terahertz wave generation and detection. The high peak power and ultrashort pulse width of femtosecond laser pulses enable them to effectively excite terahertz waves and precisely measure their properties. This efficient excitation and detection capability makes femtosecond lasers indispensable in the application of terahertz technology.
In summary, the unique physical properties of terahertz waves, combined with the efficient capabilities of femtosecond lasers in generating and detecting terahertz waves, demonstrate broad application prospects in various fields such as security detection, biomedical imaging, and communication technology. As research deepens and technology progresses, the application of terahertz waves will play an increasingly important role in the future development of science and technology.
References:
（1）J. Kuttruff et al. "Jitter-free terahertz pulses from LiNbO3.." Optics letters, 46 12 (2021): 2944-2947 . https://doi.org/10.1364/OL.430507.
The application of terahertz waves in the non-destructive testing of packaging materials and clothing is particularly prominent. Due to their excellent penetrating ability, terahertz waves can detect objects that are packaged or concealed, such as weapons or contraband hidden beneath clothing during security checks. This capability makes terahertz waves an effective tool for security detection.
The use of femtosecond lasers has significantly enhanced the efficiency of terahertz wave generation and detection. The high peak power and ultrashort pulse width of femtosecond laser pulses enable them to effectively excite terahertz waves and precisely measure their properties. This efficient excitation and detection capability makes femtosecond lasers indispensable in the application of terahertz technology.
In summary, the unique physical properties of terahertz waves, combined with the efficient capabilities of femtosecond lasers in generating and detecting terahertz waves, demonstrate broad application prospects in various fields such as security detection, biomedical imaging, and communication technology. As research deepens and technology progresses, the application of terahertz waves will play an increasingly important role in the future development of science and technology.
References:
（1）J. Kuttruff et al. "Jitter-free terahertz pulses from LiNbO3.." Optics letters, 46 12 (2021): 2944-2947 . https://doi.org/10.1364/OL.430507.