THz-Photonics Lab

Existing Facilities:

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.

Spectra Physics MiaTia Ti:Sapphire

Continuous-Wave (CW) THz spectroscopy, sensing, and imaging systems:

o Tunable CW laser, 780 nm ± 10 nm, 500 mW, free-space and fiber coupled options.
o Single frequency CW laser, 785 nm, 100 mW, free-space and fiber coupled options.
o Tunable CW lasers from Toptica Photonics, 1550 nm ± 10 nm, 500 mW.
o Two fiber coupled butterfly CW lasers, 780 nm, 500 mW.
o DSP digital lock-in amplifier, 1 mHz to 102 KHz frequency range, >100 dB dynamic reserve.
o Low-noise current amplifier, 5 fA/Hz1/2 input noise.
o Low-noise voltage amplifier, 4 nV/Hz1/2 input noise.

Tunable CW Laser

Infrared pump-probe system for carrier dynamic measurement in fast photoconductor material systems:

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

Toptica 1550 Femtosecond laser

High-power backward Wave Oscillator (BWO) and frequency multiplier sources:

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

BWO

Optical wave-meter/spectrum analyzer:

o ± 0.2 pm wavelength resolution at 1000 nm.

Golay cell THz detector:

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

Pyroelectric detector :

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

Biological sample preparation and storage facilities:

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

Others:

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