Terahertz Optomechanics
Setups for transmission or reflection measurements
- Transmission: versatile sets with 3D precision-stages
- Collimated beam (2 mirrors) or focussed beam (4 mirrors)
- Reflection: compact head with 4 mirrors
- Spot size: typ. 1 mm @ 1 THz
TOPTICA offers different sets of optomechanics, designed for the most common beam-path configurations. For transmission-mode experiments, three rail-based assemblies produce a collimated terahertz beam (2-mirror setups), or an additional focus (4-mirror setup). For applications that require a reflection geometry, a compact reflection head generates a focus at the location of the sample. The optomechanics are compatible with photoconductive antennas for both frequency-domain and time-domain applications.
Specifications
| THz Optics / Tr Comp (Compact 2-mirror setup) |
THz Optics / Tr 2M (2-mirror setup) |
THz Optics / Tr 4M (4-mirror setup) |
THz Optics / Ref 4M (Standard reflection head) |
|
| User mode | Transmission | Transmission | Transmission | Reflection |
| Terahertz beam | collimated | collimated | collimated and focussed | focused |
| Compatibility | TeraFlash pro, TeraFlash smart, TeraScan 1550 | TeraFlash pro, TeraFlash smart, TeraScan 1550, TeraScan 780 | TeraFlash pro, TeraFlash smart, TeraScan 1550, TeraScan 780 | TeraFlash pro, TeraFlash smart, TeraScan 1550 |
| No. of parabolic mirrors | 2 | 2 | 4 | 4 |
| Collimating mirrors | Ø 1", focal length 2" | Ø 2", focal length 3" | Ø 2", focal length 3" | Ø 1", focal length 2" |
| Focussing mirrors | - | - | Ø 2", focal length 2" | Ø 1", focal length 4" |
| Focus size | - | - | Typ. 1 mm @ 1 THz | Typ. 1 mm @ 1 THz |
| 2 xyz stages for photomixers | - | Included | Included | - |
| Manual delay stage | - | Included | Included | - |
| Motorized delay stage | No, please see Phase Modulation Extension | No, please see Phase Modulation Extension | No, please see Phase Modulation Extension | No, please see Phase Modulation Extension |
| Optical rails | Included | Included | Included | - |
