Nowadays terahertz (THz) time-domain spectroscopy attracts much attention of scientists because of promising applications in fingerprint spectroscopy, environment monitoring, semiconductor and medical imaging and law enforcement. Unlike other methods the THz spectroscopy allows to measure directly the strength of the field and to get in-situ the data of the real and imaginary components of refractive index. Although many principal technical advances had been witnessed in developing intense THz sources, including, for example, quantum cascade THz laser and so on, there is still a strong need to develop more powerful and tunable THz-radiation sources. In our opinion beta- barium borate (β-BaB2O4) crystals (BBO) have high impact in harmonic frequency generation and even parametric amplifiers for this spectral range. The BBO crystals are transparent in submillimeter-wave range and more importantly have large birefringence and strong dispersion in this field.
展开▼
机译：如今，太赫兹（THz）时域光谱法在指纹光谱法，环境监测，半导体和医学成像以及执法领域具有广阔的应用前景，引起了科学家的广泛关注。与其他方法不同，太赫兹光谱法可以直接测量电场强度，并就地获得折射率的实部和虚部的数据。尽管在开发强太赫兹源方面已见证了许多主要技术进步，例如量子级联太赫兹激光器等，但仍强烈需要开发更强大且可调谐的太赫兹辐射源。我们认为，β-硼酸钡（β-BaB 2 O 4 ）晶体（BBO）在此频谱范围内的谐波频率生成甚至参数放大器中都具有很高的影响力。 BBO晶体在亚毫米波范围内是透明的，更重要的是在该场中具有大的双折射和较强的色散。
展开▼
