Band-pass filters for THz spectral range fabricated by laser ablation

THz components and plasmonic structures fabricated by direct laser patterning of metals

“…The metal mesh resonant band-pass filters were fabricated in 30 µm-thick molybdenum foil [2]. The periodically distributed cross-shape apertures were cut in the area of 20x20 mm 2 (Fig.…”

“…Direct laser patterning (DLP) technology was recently proposed for mask-less fabrication of THz components such as resonant filters [2], terahertz zone plates with added frequency selectivity [3], and plasmonic metal films [4]. DLP is very convenient for its capability to fabricate micro apertures and surface patterns in a wide range of materials including plastics, dielectrics, metals, and others.…”

Photothermal direct writing of metallic microstructure for frequency selective surface at terahertz frequencies

“…Our PTDW technique is related to, but different from conventional laser direct writing (LDW) technique. Conventional LDW systems use ultrafast picosecond or femtosecond pulsed laser sources at UV wavelength [5]. The only other paper referring to nanosecond laser ablation of gold film is using 514nm visible light, by C. P. Grigoropoulos' group [4].…”

Thermal Tunable Terahertz Wave Goos–Hänchen Shift

“…With the rapid development of terahertz wave sources and detection devices, terahertz wave technology has attracted extensive attention during the past decades. Many terahertz wave potential applications have been explored such as biological imaging and sensing, medical diagnosis, security screening, military detection, radio astronomy, atmospheric studies, and free space communication [1]- [4], which have dramatically accelerated the study of terahertz functional devices including switches [5], [6], filters [7], [8], modulators [9], and splitters [10], [11]. Despite significant efforts have been focused on the components search for controlling and manipulating terahertz wave, much work remains.…”