Photoconductive THz near-field microprobes

Every probe,
side by side.

Seven probe types in ten configurations — sensitive to transversal, longitudinal or emitted THz fields, sampled at 800 nm or telecom wavelength. Spatial resolution narrows the choice fastest, so start there.

Max. spatial resolution across the TeraSpike range — µm, log scale Finest Range
1 3 10 30 100 300 DETECTORS TRANSCEIVERS TD-800-X · HR 3 µm TD-800-Z 8 µm TD-800-X · HRS 20 µm 1550-X · WT 40 µm 1550-X · WT-XR 80 µm TSR-TT.75 40 µm TSR.75 100 µm TR.5 250 µm
Select a probe

Filter by what you measure.

Field orientation and excitation wavelength are set by your setup; resolution and mode by your sample. Combine the filters to narrow the range.

Function
Field axis
Excitation
Mode
Showing all 7 probe types
Detector · X-series

TeraSpike TD-800-X

 Sensitive to THz field components transversal to the tip axis. The HR option omits the resonant antenna for the finest resolution and higher bandwidth; HRS adds an antenna for enhanced sensitivity around 1 THz. HR 3 µm · HRS 20 µm Gap 1.5 / 2 µm λ 700–860 nm Dark current < 0.5 nA Connector SMP 3 µm Best resolution View probe →
Detector · Z-series

TeraSpike TD-800-Z

 Sensitive to THz field components longitudinal to the tip axis. The N option runs without a resonant antenna for higher bandwidth; A-500G adds an antenna element for enhanced sensitivity around 0.5 THz. N / A-500G 8 µm Gap 2 / 5 µm λ 700–860 nm Dark current < 0.4 nA Connector SMP 8 µm Best resolution View probe →
Detector · 1550-X-series

TeraSpike TD-1550-X

 The first probes sampled directly by telecom-wavelength pulses. Transversal field sensitivity with a clean spectral response from the patent-pending internal wave-trap; the XR variant trades resolution for mechanical robustness where sample distance is hard to control. HR-WT 40 µm · XR 80 µm Gap 1.5 µm λ 1500–1600 nm Photocurrent > 12 µA Connector SMP 40 µm Best resolution View probe →
Transceiver · TR-series

TD-800-TSR-TT.75

 Single-antenna transceiver at normal incidence, usable in both reflection and transmission. The strongest choice of the TR series for surface scanning at maximum spatial resolution. Antennas 1 Incidence 0° Bandwidth 2 THz λ 700–860 nm 40 µm Spatial resolution View probe →
Transceiver · TR-series

TD-800-TSR.75

 Two closely spaced antennas at 15° incidence, with the widest bandwidth in the TR series. Built for near-surface volume inspection where resolution still matters. Antennas 2 Incidence 15° Bandwidth 3 THz λ 700–860 nm 100 µm Spatial resolution View probe →
Transceiver · TR-series

TD-800-TR.5

 A pair of closely spaced photoconductive antennas at normal incidence — one emits, one detects. The entry point into reflection-mode volume inspection with the shortest THz transmission path. Antennas 2 Incidence 0° Bandwidth 1.5 THz λ 700–860 nm 250 µm Spatial resolution View probe →
Emitter · BF-series

TeraSpike TD-1550-Y-BF

 A bias-free microprobe emitter for surface-near THz generation on planar waveguides, metallic surfaces and metamaterials. The optically generated field is polarized in y; pair it with an X- or Z-series detector for contact-free on-chip measurement. Bias none λ 700–1600 nm Excitation power 0.1–4 mW Substrate InGaAs > 2.5 THz Emission bandwidth View probe →
Tip designs & bundles

Options that change the trade-off.

Both options are patent-pending cantilever designs, available for the x- and z-field sensitive probes.

Option

WT — wave-trap

Suppresses internal reflections →
Option

XR — extended robustness

For rougher environments →
Bundle

Starter-kit

Probe, phantom, mount, cabling →
Not sure which probe

Describe your sample.

Tell us the field orientation you need to resolve, your laser wavelength and your working distance — we'll name the probe and the option, and say when none of them fits.

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