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Terahertz photoelectric conductive antenna array

A photoconductive antenna and terahertz technology, which is applied in the direction of antenna array, separately energized antenna array, antenna, etc., can solve the problem of low synthesis degree of photoconductive antenna array, and achieve the effect of enhancing strength and power

Inactive Publication Date: 2018-04-20
XIAN UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a terahertz photoconductive antenna array, which solves the problem of low synthesis degree of existing photoconductive antenna arrays

Method used

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  • Terahertz photoelectric conductive antenna array
  • Terahertz photoelectric conductive antenna array
  • Terahertz photoelectric conductive antenna array

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Embodiment Construction

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The invention provides a terahertz photoconductive antenna array, which includes an antenna matrix composed of N×N photoconductive antenna array elements. The electrode spacing of the same photoconductive antenna array element in the antenna matrix is ​​2 μm-2 mm. The element is powered by an independent power supply device, the antenna elements are simultaneously triggered by the pump light, and the terahertz waves emitted by all the antenna elements are converged at the same point by the focusing optical element.

[0025] like figure 1 As shown, the above-mentioned antenna matrix is ​​a 2×2 photoconductive antenna array composed of 4 separate antenna elements, and the 4 elements are bonded to a high-resistance silicon support lining with good transmittance to THz waves. bottom. The entire device is housed in an 8-pin semiconductor pa...

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Abstract

The invention discloses a terahertz photoelectric conductive antenna array. The terahertz photoelectric conductive antenna array comprises an antenna matrix formed by N*N photoelectric conductive antenna array elements; each antenna array element is powered by one independent power supply apparatus separately; the antenna array elements are triggered synchronously by pumped light; and the terahertz waves emitted by all the antenna array elements are focused on the same point by a focusing optical element. By virtue of the terahertz photoelectric conductive antenna array, influence of an inverted bias electric field in the THz photoelectric conductive antenna array is eliminated, and the THz waves radiated by each antenna array element reach about 100% of synthesis degree, so that THz waveradiation strength and power of the photoelectric conductive antenna array are greatly reinforced; the THz waves radiated by each antenna array element are completely consistent in phases, and the synthesized waveform shapes and the waveforms radiated by each antenna array element are totally the same, without causing any influence to the spectral characteristics.

Description

technical field [0001] The invention belongs to the technical field of photoconductive antennas, and in particular relates to a terahertz photoconductive antenna array. Background technique [0002] Terahertz (THz) electromagnetic wave is a segment of electromagnetic radiation between microwave and infrared in the electromagnetic spectrum. Due to its unique properties, it has a wide range of application prospects in biomedical imaging, drug and explosive detection, security inspection, communications and other fields. In the past 30 years, terahertz science and technology have developed rapidly, but the lack of high-power THz sources has always been a bottleneck restricting the development of THz technology. [0003] Since Auston first discovered that a biased photoconductive antenna triggered by a femtosecond laser can generate THz waves, photoconductive antennas have been widely used in laboratory and commercial THz time-domain spectroscopy systems as an efficient and stab...

Claims

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Application Information

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IPC IPC(8): H01Q21/06H01Q23/00H01Q19/06H01Q1/36H01Q1/22
CPCH01Q1/2283H01Q1/36H01Q19/062H01Q21/065H01Q23/00
Inventor 施卫侯磊闫志巾杨磊董陈岗
Owner XIAN UNIV OF TECH
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