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Intense terahertz generation from photoconductive antennas 被引量:7
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作者 Elchin ISGANDAROV Xavier ROPAGNOL +1 位作者 Mangaljit SINGH Tsuneyuki OZAKI 《Frontiers of Optoelectronics》 EI CSCD 2021年第1期64-93,共30页
In this paper,we review the past and recent works on generating intense terahertz(THz)pulses from photoconductive antennas(PCAs).We will focus on two types of large-aperture photoconductive antenna(LAPCA)that can gene... In this paper,we review the past and recent works on generating intense terahertz(THz)pulses from photoconductive antennas(PCAs).We will focus on two types of large-aperture photoconductive antenna(LAPCA)that can generate high-intensity THz pulses(a)those with large-aperture dipoles and(b)those with interdigitated electrodes.We will first describe the principles of THz generation from PCAs.The critical parameters for improving the peak intensity of THz radiation from LAPCAs are summarized.We will then describe the saturation and limitation process of LAPCAs along with the advantages and disadvantages of working with widebandgap semiconductor substrates.Then,we will explain the evolution of LAPCA with interdigitated electrodes,which allows one to reduce the photoconductive gap size,and thus obtain higher bias fields while applying lower voltages.We will also describe recent achievements in intense THz pulses generated by interdigitated LAPCAs based on wide-bandgap semiconductors driven by ampli-fied lasers.Finally,we will discuss the future perspectives of THz pulse generation using LAPCAs. 展开更多
关键词 sub-cycle intense terahertz(THz)pulses ultrafast Ti:sapphire lasers wide-bandgap semiconductors large-aperture photoconductive antenna(LAPCA) phase mask interdigitated large-aperture photoconductive emitters(ILAPCA)
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