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Terahertz Antennas

  • THz Antennas for 800 nm or 1560 nm
  • Optimized Structures for High Signal-to-Noise Ratios and Improved Bandwidth
  • Individually Tested, Includes Test Report


THz Antenna Mount


THz Receiver for 1560 nm


THz Antenna for 800 nm
(Not to Scale)

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Simon Kocur
Simon Kocur
Menlo Systems
Feedback? Questions? Need a Quote?

Please note that these terahertz antennas are available directly from Menlo Systems, Inc. within the United States and from Menlo Systems GmbH outside the United States.
United States
Phone: +1-973-300-4490
Outside United States
Phone: +49-89-189166-0


  • THz Generation and Detection
  • THz Imaging


  • Optimized for Femtosecond Lasers Around 800 nm or 1560 nm
    • Pulse Widths < 100 fs
    • 100 MHz Repetition Rate
  • High Conversion Efficiency
  • Mount Available for 800 nm Antenna Module
  • Robust Design without Bonded Wires
  • Individual Test Report Included

Menlo Systems offers photoconductive antennas made for excitation wavelengths of 800 nm and 1560 nm. An optomechanical antenna mount for the TERA8-1, which features XY adjustment and is compatible with Thorlabs' cage systems, is also available.

To view lenses designed for the terahertz regime, see Menlo Systems' THz lenses.

For complete terahertz solutions that include a laser source and data acquisition hardware and software, see the TERA-K15-SYNC, TERA-SMART, and TERA-ASOPS spectrometer systems.

Item # TERA8-1
Photoconductive Material LT-GaAs
Bandwidth >4 THz
Dipole Structures 20 µma
Gap Size 5 µm
Substrate Size 5 mm x 5 mm x 0.35 mm
Electrical Connection Bonded Structure on PCB
(40 mm x 40 mm)
Operating Conditions
Average Optical Power <10 mWb
Pulse Duration <100 fs
Repetition Rate Range 80 - 250 MHz;
Optimized for 100 MHz
Bias Voltage Recommended: ±35 V
Max: ±40 V
Recommended Laser Source C-FIBER-780
  • Menlo Systems' Standard Length for High Bandwidth and High Sensitivity
  • Caution: Maximum Optical Power 10 mW at 100 MHz Laser Repetition Rate
Item # TERA15-TX-FC (Emitter) TERA15-RX-FC
Photoconductive Material InGaAs/InAlAs LT-InGaAs/InAlAs
Spectral Photosensitivity Up to 1.57 µm
Antenna Type Strip Line: 100 µm Dipole: 25 µm
Gap: 10 µm
THz Beam Divergence ±12.5° FWHMa ±12.5° FWHMa
THz Power Up to 60 µWb N/A
Electrical Connection LEMO 0S Connector Cable, 1 m Long SMB Connector Cable with BNC Adapter, 1 m Long
Fiber Patch Cable PM PANDA Fiber, FC/APC, 1 m Longc
Operating Conditions
Average Optical Powerd <30 mW <40 mW
Optical Pulse Duration <100 fs <100 fs
Repetition Rate Range 80 - 250 MHz;
Optimized for 100 MHz
Bias Voltage 100 V (Unipolar)
0 - 100 V Modulation
Modulation Frequency Up to 75 kHz (Unipolar) N/A
Recommended Laser Sources ELMO
  • Measured with Golay Cell
  • Measured with Calibrated Pyrodetector
  • SMF-28 Fiber Available on Request
  • Caution: Maximum Optical Power is 30 mW for Emitter and 40 mW for Receiver at 100 MHz Laser Repetition Rate

Posted Comments:
djamal.gacemi  (posted 2014-06-04 09:45:20.173)
Hello, could you tell me the value of the photocurrent you obtain with 10mW optical power, and 35V bias ? THank you
jlow  (posted 2014-07-29 04:01:05.0)
Response from Jeremy at Thorlabs: When the TERA8-1 are tested with 30VDC bias and 10mW optical power, the typical current is 40uA. Menlo Systems should have the test report for your particular antenna on file. You can contact them at for the test report.
tcohen  (posted 2012-06-28 11:31:00.0)
Response from Tim at Thorlabs to Dominik: Thank you for your feedback! We are looking into compiling the data on the beam profile for you and I have contacted you to keep you updated and assist you directly.
d.stich  (posted 2012-06-25 05:33:03.0)
Hello, could you specify which Si-lenses you use for the 800 and 1550nm driven THz-Antennas and what the beam profile looks like after the Si-Lense (NA, intensity profile)? Regards, Dominik

Terahertz Antennas for 800 nm

THz Spectrometer
Click to Enlarge

Detail of the wrapped dipole structure of the TERA8-1.
  • Optimized for Lasers Around 800 nm
    • Pulse Widths <100 fs
    • 100 MHz Repetition Rate
  • Chip Mounted on PCB
  • >4 THz Bandwidth
  • High Conversion Efficiency

The TERA8-1 antenna is a single dipole structure based on low temperature (LT)-grown GaAs. The chip is mounted on a PCB, and the structure is robust without bonded wires. The antenna can be used both as an emitter and as a detector. The antenna is a ready-to-use unit that comes mounted and connected. Its performance has been tested and verified for use in a wide range of THz experiments.

To obtain the best performance of the TERA8-1 antenna, Menlo Systems offers the T8-H2 mount, which includes a focusing lens for the input beam and a collimating Si lens for the THz radiation. The T8-H2 mount features XY position adjustment of the Si lens relative to the TERA8-1 antenna, as well as XY adjustment of the TERA8-1 position using differential screws for precisely aligning the antenna to the focus of the input beam. The beam height is 85 mm.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
TERA8-1 Support Documentation
TERA8-1Terahertz Antenna for 800 nm, Free-Space Input
Menlo Lead Time
T8-H2 Support Documentation
T8-H2Mount for TERA8-1 THz Antenna
Menlo Lead Time

Terahertz Antennas for 1560 nm

  • Optimized for Lasers Around 1560 nm
    • Pulse Widths <100 fs
    • 100 MHz Repetition Rate
  • >4.5 THz Bandwidth
  • >80 dB Dynamic Range
  • PM Fiber Coupling
  • Lock-In Free Operation Possible
  • High Conversion Efficiency

Menlo Systems' flexible, fiber-coupled TERA15-TX-FC and TERA15-RX-FC antenna modules for 1560 nm lasers are the unique solution for flexible, robust, all-fiber terahertz time domain spectroscopy systems. The high-power antenna technology is based on InGaAs/InAlAs multilayered mesa structures for the emitter and the receiver. For maximum THz bandwidth, Menlo Systems offers separate units optimized to act as the emitter and the detector. The polarization-maintaining (PM) coupling fiber ensures reliable and stable operation, even under harsh environmental conditions.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
TERA15-TX-FC Support Documentation
TERA15-TX-FCTerahertz Emitter for 1560 nm, Fiber-Coupled Input
Menlo Lead Time
TERA15-RX-FC Support Documentation
TERA15-RX-FCTerahertz Receiver for 1560 nm, Fiber-Coupled Input
Menlo Lead Time
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