Silver/polystyrene-coated hollow glass waveguides for the transmission of terahertz radiation

Abstract

We have applied techniques developed for IR waveguides to fabricate Ag/polystyrene (PS) -coated hollow glass waveguides (HGWs) for transmission of terahertz radiation. A loss of 0.95 dB/m at 119 microm (2.5 THz) was obtained for a 2 mm bore, 90 cm long Ag/PS HGW. We found that TE modes are supported in HGWs with thin PS films, while hybrid (HE) modes dominate when PS film thickness increases. The lowest losses are obtained for the thicker PS films and the propagation of the HE modes.

Thermally generated long-lived quantum correlations for two atoms trapped in fiber-coupled cavities

“…The transition frequency of the atom is chosen to be midinfrared (MIR), i.e. ω a /2π = 4THz and hence, for experimental purposes the coupling between the distant cavities can be realized by using the modern resources of IR fiber optics, e. g. hollow glass waveguides [20], plastic fibers [21], etc. We choose the range of MIR frequencies in order to limit the thermal reservoir only up to room temperature (300K), which corresponds to a thermal photon.…”

Porous-core honeycomb bandgap THz fiber

“…Terahertz waveguides have consequently also attracted attention, both for distributing the radiation and as functional devices [2]. Apart from hollow metallic and glass waveguides [3,4], the material of choice when making terahertz waveguides is polymer, i.e., poly(methyl-methacrylate) (PMMA) [5], Teflon [6], high-density polyethylene (HDPE) [7,8], and Topas [9]. The reasons for this material choice are that polymers have the lowest loss of most materials in the THz range and they are for the most part easy to machine.…”

Broadband terahertz fiber directional coupler

“…Consequently, there are now several demonstrated THz frequency waveguide concepts [2][3][4][5][6][7][8][9][10][11][12][13]. As the waveguides increase in quality, the next step is to make functional THz waveguide devices.…”