About: Photomixing

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Photomixing is the generation of continuous wave terahertz radiation from two lasers. The beams are mixed together and focused onto a photomixer device which generates the terahertz radiation. It is technologically significant because there are few sources capable of providing radiation in this waveband, others include frequency multiplied electronic/microwave sources, quantum cascade laser and ultrashort pulsed lasers with photoconductive switches as used in terahertz time-domain spectroscopy. The advantages of this technique are that it is continuously tunable over the frequency range from 300 GHz to 3 THz (10 cm−1 to 100 cm−1) (1 mm to 0.1 mm), and spectral resolutions in the order of 1 MHz can be achieved. However, the achievable power is on the order of 10−8 W.

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  • المزج الضوئي هو تقنية لتوليد موجة مستمرة لأشعة التيراهيرتز باستخدام موجتين ضوئيتين مختلفتي التردد من جهازي ليزر. يُمزج فيضا الشعاعين ويركزان في بؤرة لمازج ضوئي فينتج عنهما إشعاع التيراهرتز. عند وقوع الموجتين على مادة شبه موصلة، فإن الفرق بين هذين الترددين يقع في مجال التيراهيرتز.سبب حدوث ذلك هو الطبيعة غير الخطية للمادة شبه الموصله وطبيعة المدة الزمنية القصيرة للالكترونات المهيجة عند امتصاصها لاحد الموجات. (ar)
  • Photomixing is the generation of continuous wave terahertz radiation from two lasers. The beams are mixed together and focused onto a photomixer device which generates the terahertz radiation. It is technologically significant because there are few sources capable of providing radiation in this waveband, others include frequency multiplied electronic/microwave sources, quantum cascade laser and ultrashort pulsed lasers with photoconductive switches as used in terahertz time-domain spectroscopy. The advantages of this technique are that it is continuously tunable over the frequency range from 300 GHz to 3 THz (10 cm−1 to 100 cm−1) (1 mm to 0.1 mm), and spectral resolutions in the order of 1 MHz can be achieved. However, the achievable power is on the order of 10−8 W. (en)
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  • المزج الضوئي هو تقنية لتوليد موجة مستمرة لأشعة التيراهيرتز باستخدام موجتين ضوئيتين مختلفتي التردد من جهازي ليزر. يُمزج فيضا الشعاعين ويركزان في بؤرة لمازج ضوئي فينتج عنهما إشعاع التيراهرتز. عند وقوع الموجتين على مادة شبه موصلة، فإن الفرق بين هذين الترددين يقع في مجال التيراهيرتز.سبب حدوث ذلك هو الطبيعة غير الخطية للمادة شبه الموصله وطبيعة المدة الزمنية القصيرة للالكترونات المهيجة عند امتصاصها لاحد الموجات. (ar)
  • Photomixing is the generation of continuous wave terahertz radiation from two lasers. The beams are mixed together and focused onto a photomixer device which generates the terahertz radiation. It is technologically significant because there are few sources capable of providing radiation in this waveband, others include frequency multiplied electronic/microwave sources, quantum cascade laser and ultrashort pulsed lasers with photoconductive switches as used in terahertz time-domain spectroscopy. The advantages of this technique are that it is continuously tunable over the frequency range from 300 GHz to 3 THz (10 cm−1 to 100 cm−1) (1 mm to 0.1 mm), and spectral resolutions in the order of 1 MHz can be achieved. However, the achievable power is on the order of 10−8 W. (en)
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  • مزج ضوئي (ar)
  • Photomixing (en)
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