Facility

Ultrafast laser and amplifier



 

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

Device fabrication




 

– 250-kHz regenerative amplifier (Coherent RegA 9050): > 6 µJ 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)

– 1 kHz regenerative amplifier (Coherent Astrella): > 7 mJ per pulse

– Ultrafast Ti: Sapphire oscillator (Coherent Micra)

AttoDRY 2100 with magneto-transport measurements, confocal microscopy & spectroscopy or scanning probe microscopy: closed cycle cryostat, an automated temperature control from 1.65 K to 300 K, ~9 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

– 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

– 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 

– Glove box with oxygen and water level below 1 ppm

– Mask-aligner with 1 μm of alignment accuracy

– Furnace for thermal annealing

– Low-temperature probe station with 6 contact arms

– Fume hood for chemical treatment

– Thermal Evaporator system with thickness measurement

– Reactive Ion Etcher (Ar, O2, SF6, CF4)

Copyright ⓒ Ultrafast Quantum Photonics Laboratory, 2011
Department of Physics & Astronomy, Seoul National University

1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea (South Korea)