Facilities

THz Transmission-Reflection Time-Domain Spectroscopy (TDS)

Terahertz Time Domain Spectroscopy is a prominent technique for studying materials in the terahertz realm.

Our system generates THz through LT-GaAs photo-conductive antenna and uses electro-optic sampling (through ZnTe crystal) for time domain detection, offering a bandwidth from 0.1 to 2.5 THz.

Near-field Scanning Terahertz Spectroscopy

Terahertz Near-Field Scanning Spectroscopy can sense electric fields in the nearfield, which can be used to characterise and map near field action based on modes and dipoles like resonances, field profile and metamaterials.

Our system can perform phase sensitive detection of the individual terahertz electric components of the near field.

Optical Pump - THz Probe

This Optical Pump - Terahertz Probe system is used to study material carrier dynamics like lifetime and mobility. This technique is useful to characteristic study for potential Terahertz generation and Detection materials and also for general probing of materials

Optical Pump - Optical Probe

THz Continuous-Wave Spectroscopy

Continuous-Wave Terahertz Spectroscopy is a highly sensitive frequency-domain spectroscopy technique based on the principle of photo-mixing.

Our system mixes two tunable IR Lasers beams, the envelope frequency of which corresponds to the THz range. This beam frequency is scanned to modulate an InGaAs photo-conductive antenna to generate THz which is sensed via heterodyne detection, offering a precision of ~1 MHz in the THz range.