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THz and Sub THz Band Pass Filters

Quasi-optical band-pass filters are intended for selecting specified frequencies in the range of mm- and submm-waves.
The filters can be used in a variety of applications including laboratory and space research. They feature a specially designed multilayer frequency selective microstructure, which resonantly transmits the radiation within a specified frequency band and reflects the out-of-band radiation.

We offer a wide choice of high-performance band-pass filters with central frequencies up to several THz.
The filters exhibit high peak transmission and low out-of-band spectral leakage. To maximize the out-of-band blocking, two filters in series can be easily employed without significant losses in a peak transmittance.
Additionally, the filters can be designed according to the customer’s specification.

Our filter technology is versatile and can be optimized for a wide range of experimental demands including operation in cryogenic environment.


Key features:

  • Central frequency of transmission maximum vmax: 0.07 ÷ 3 THz
  • Relative bandwidth: delta v/vmax: 15 ÷ 20%
  • Peak transmission: 84 ÷ 97%
  • Out-of-band blocking: 23 ÷ 40dB
  • Polarization insensitivity
  • Compatibility with operation in vacuum

Additional Information
Key number: 317
Dr. Wolf-Dieter Wagner

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