Recent trends in laser-based standoff detection of hazardous molecules

Uniform LIPSS on copper created using zeroth-order femtosecond Bessel beam for SERS-based applications

“…Plasmonic nanoelements with single metal/semiconductor/alloy interfaces [5][6][7] have historically been used for sensing-based research and have several important applications in the domain of nanophotonics [8][9]. While several analytical methods [10] have been used in modern times to detect various compounds, sensing using SERS [11][12][13][14] has offered a very impactful, nondestructive, signature way for the majority of hazardous compounds. For this reason, the plasmonic Cu nanostructure was used as a SERS sensor.…”

Ag-Au bimetallic ladder-like nanostructures achieved with femtosecond Bessel beam for real-time sensing of tetryl and ammonium nitrate

“…Plasmonic, non-plasmonic, alloy-interfaced, coated nano entities [5][6][7] have always been resourceful in sensing-based studies, along with various other significant applications in several fields of nanophotonics [8], nonlinear optics [8][9], optical switching [9]. In the modern world, though various techniques [10] have been adopted for sensing hazardous materials, SERS-based sensing [11][12][13][14] provided a nondestructive, fingerprint approach for most of the molecules. Hence, the plasmonic BM NS was employed as a SERS sensor.…”

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…A review (with 179 references) of laser-based standoff detection of hazardous materials including explosives has been presented by Narlagiri et al 62 Techniques included in the overview included Raman spectroscopy, LIBS and LIF as well as an assortment of less well known techniques such as quantum cascade laser and external cavity quantum cascade laser-based IR, photoacoustic spectroscopy and terahertz spectroscopic imaging. The authors stated that the recent development of improved laser sources and detectors as well as the availability of databases of various hazardous materials has led to rapid evolution of the standoff techniques over the last few years.…”