THz-Photonics Lab

Terahertz Time-domain (Pulsed) Spectroscopy, Sensing, and Imaging Systems

• 
  fs-short pulse laser (Spectra Physics MiaTia Ti:Sapphire oscillator system), continuously tunable over the wavelength range of 690 nm-1020 nm, pulse duration 2.5 W.
• fs-short pulse laser (Toptica Photonics FemtoFiber FFS short pulse laser), continuously tunable over the wavelength range of 1050 nm-2100 nm, pulse duration ~100 fs, 80 MHz repeat rate, average power 250 mW @ 1550 nm.
• Transmission, reflection, and Attenuated Total Reflection (ATR) measurements.

Continuous-wave (CW) THz Spectroscopy, Sensing, and Imaging Systems

• 
  Tunable CW laser, 780 nm ± 10 nm, 500 mW, free-space and fiber coupled options.
• Single frequency CW laser, 785 nm, 100 mW, free-space and fiber coupled options.
• Tunable CW lasers from Toptica Photonics, 1550 nm ± 10 nm, 500 mW.
• Two fiber coupled butterfly CW lasers, 780 nm, 500 mW.
• DSP digital lock-in amplifier, 1 mHz to 102 KHz frequency range, >100 dB dynamic reserve.
• Low-noise current amplifier, 5 fA/Hz^1/2 input noise.
• Low-noise voltage amplifier, 4 nV/Hz^1/2 input noise.

Infrared Pump-probe System for Carrier Dynamic Measurement in Fast Photoconductor Material Systems

• 
  Free carrier dynamics can be measured over a wide range of wavelengths from 690 nm up to 2100 nm.
• Sub-picoseconds carrier life-time can be measured for material systems based on GaAs, InGaAs, InP, Si, …

High-Power Backward Wave Oscillator (BWO) and Frequency Multiplier Sources

• 
  Range of coverage: 100 GHz-1.5 THz.
• Output power: 100mW – 1µW.

Optical Wave-meter/Spectrum Analyzer

• ± 0.2 pm wavelength resolution at 1000 nm.

Golay Cell THz Detector

• Sensitivity: 0.1 nW/Hz ^1/2 .
• Spectral range: 0.02-20 THz.

Pyroelectric Detector

• Sensitivity: 10 nW/Hz ^1/2 .
• Spectral range: 0.1 – 3 THz.

Biological Sample Preparation and Storage Facilities

• Hybridization incubator
• Refrigerator/Freezer
• Balance with 0.1 mg readability
• PH and ion concentration meter
• Purifier vertical clean bench

Others

• Nicon AZ100 Multi-Purpose Zoom Microscope.
• Ocean Optics high resolution optical spectrum analyzer.