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An all-optical, sub-wavelength terahertz characterization technique based on an ultra-thin-knife-edge is demonstrated employing ultraviolet-pulse to project the blade image on a ZnTe crystal, where the free carriers excited on a blade-shaped area act as field-shield.
We show that by employing positively chirped optical probe pulses above a critical power it is possible to enhance the detection bandwidth and signal obtained by Air Biased Coherent Detection scheme for broadband terahertz fields.
We report on the experimental demonstration of ultra-high speed temporal integration of optical complex waveforms by using an integrated and CMOS compatible micro-ring resonator. The device offers an unprecedented processing speed > 400GHz.
We implement a simple and powerful approach to characterize the domain distribution in the bulk of quadratic ferroelectric crystals via far-field second-harmonic spectroscopy. The approach is demonstrated in a lithium tantalate sample with periodic electric field poling and random mark-to-space ratio.
We report on terahertz pulse generation by optical rectification of intense femtosecond laser pulses in a large aperture ZnTe single-crystal wafer, and on the possible applications to nonlinear THz optics.
We report on experimental realization and testing of an ultrafast temporal differentiator of optical signals with sub-picosecond features using all-fiber technology.
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