Facility

Ultrafast laser and amplifier

– Ultrafast Ti: Sapphire oscillator (Coherent Micra)
– 250-kHz regenerative amplifier (Coherent RegA 9050): > 6 µJ per pulse
– 1 kHz regenerative amplifier (Coherent Astrella): > 7 mJ per pulse
– Tunable (1.2 µm ~ 2.4 µm) infrared Optical Parametric Amplifier (Coherent OPA 9850)
– Visible (480 nm ~ 2.3 µm) Optical Parametric Amplifier (Coherent OPA 9450)
– Mid-IR (3 µm ~ 6 µm) Difference-Frequency Generators (Coherent DFG 9850)
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Ultrafast spectroscopy

– Optical-pump (400 nm ~ 6 µm) and THz-probe (0.5 THz ~ 20 THz) spectroscopy
– All optical pump-probe (400 nm ~ 6 µm) spectroscopy
– Ultrafast Kerr-rotation spectroscopy and microscopy
– Scanning near-field confocal microscopy: home-built spatially (~ 1 µm) and temporally (~ 100 fs) resolved scanning microscopy with PL, PLE, and photocurrent 2D mapping
– Time-correlated single-photon counting and timing (PicoQuant) for quantum optics


Measurement systems

– AttoDRY 1000 with confocal microscopy: closed cycle cryogen-free 4 K, 12 Tesla
– Photoluminescence excitation spectroscopy (PLE) coupled with ultrafast lasers and high-power super-continuum source (400 nm ~ 2,400 nm)
– Photoluminescence (PL) spectroscopy coupled with ultrafast lasers and various diode lasers
– Quantum cascade laser (QCL): continuous-wave lasing at 4.5 µm
– Quantum cascade laser (QCL): continuous-wave lasing at 9.5 µm
– Oxford Microstat: 4 K, liquid-flow vacuum cryostat for all-optical spectroscopy
– Oxford Microstat: 4 K, liquid-flow vacuum cryostat for scanning near-field microscopy
– JANIS ST-300 cryostat: 4 K, liquid-flow vacuum cryostat for THz spectroscopy
– JANIS ST-500 cryostat: 4 K, liquid-flow vacuum cryostat for single photon emitters


Device fabrication

– Mask-aligner with 1 μm of alignment accuracy
– Reactive Ion Etcher (Ar, O2, SF6, CF4)
– Thermal Evaporator system with thickness measurement
– Fume hood for chemical treatment
– Furnace for thermal annealing
– Glove box with oxygen and water level below 1 ppm
– Low-temperature probe station with 6 contact arms