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Thin metal wires are known to be a low loss and very low dispersion terahertz (THz) waveguide [1]. Recently, generation of a strong THz surface wave was demonstrated by irradiating a wire surface with a ultrahigh intensity femtosecond laser [2]. Such THz light sources driven by femtosecond laser induced plasma are expected to have a high potential as a power scalable source. However, the characteristics...
Quantum field theory offers the most exact description of the physics of microscopic interactions. The process offield quantization necessitates the existence of a vacuum field with a corresponding zero-point energy [1]. From this point of view, the ability to directly measure and manipulate electrodynamic quantum vacuum field is an attractive prospect for experimental physics. It is bound to shed...
The goal of any pulse characterization protocol is to describe how the spectral components of the electric field are changing in time. Apart from linear methods such as streak cameras, characterization techniques based on nonlinear processes have been developed. Those processes require broad spectral acceptance bandwidths, i.e. to be capable of resolving ultrashort features of the pulse. For many...
The QCL comb was first unveiled in the mid-IR in 2014, proven a true comb by a technique called beatnote spectroscopy[1]. The temporal field profile of such a comb is of great interest, but unfortunately such a technique does not capture phase information. We already know the inherently short upper-state lifetime of QCLs inhibits transform limited pulses[2] as in conventional mode-locked laser combs,...
Vibrational spectroscopy in the mid-infrared (MIR) molecular fingerprint region (∼2–25 μm) provides information on the molecular composition, structure and conformation, affording tremendous potential for advances in fields ranging from fundamental research over security and environmental applications to biology and medicine. Traditionally, broadband measurements in this spectral region are carried...
Lithium niobate (LN) is widely used and established in nonlinear and integrated optics. Efficient nonlinear frequency conversion is enabled by quasi-phase matching of the interacting waves through periodic poling of the crystal domains. For realizing miniaturized optical devices, the application of lithium niobate on insulator (LNOI) substrates becomes increasingly important. LNOI consists of a LN...
NV centers ensemble have proven to be sensitive and versatile sensor platform for many applications such as magnetometry [1, 2], electric field sensing [3], thermometry [4] and rotation sensing [5]. The tradeoff between concentration of NVs and coherence lifetime of the electronic spin limits the maximum sensitivity of such devices. Recently usage of quantum memory associated with nuclear spins nearby...
An electrical pulse is completely defined by its time-dependent amplitude, phase and polarization state. For optical and near-infrared pulses the manipulation and characterization of the last one is fundamental due to its relevance in several scientific and technological fields. Although the complete characterization of optical waveform has been already demonstrated [1, 2], a technique both capable...
With the development of modem THz technology [1], which can provide electric fields with GV/m gradients, THz-based control and manipulation of the electron bunches has become possible. THz-driven electron acceleration, compression and streaking have attracted much attention recently [2, 3]. Here, we present a novel THz driven electron streak camera that provides sub-fs temporal resolution using a...
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