ALBA Synchrotron
An ultra-high vacuum (UHV) photon-SPM counting with the capability to study light-matter interactions with atomic-scale spatial resolution. The instrument combines traditional STM, scanning probe spectroscopies (STS, IETS) and non-contact (nc)-AFM modes with several optical spectroscopies to perform tip-enhanced nanoscopies like STML, TERS or TEPL.
Available SPM techniques
Scanning tunnelling microscopy and spectroscopy (STM/STS).
Inelastic electron tunnelling spectroscopy (IETS).
Non-contact atomic force microscopy (nc-AFM).
Kelvin probe force microscopy and spectroscopy (KPFM/KPFS).
Ultra-high vacuum, temperature ≥ 4.7 K, magnetic field ≤1 T, lateral atom-scale resolution, vertical resolution ≥1.8 pm, spectral resolution ≥ 2 meV, ~5 µm optical resolution for tip navigation
Scanning tunnelling microscopy-induced luminescence (STML).
Tip-enhanced photo-luminescence (TEPL).
Tip-enhanced photocurrent (TEPC) (not yet available).
Time-resolved TEPL with simultaneous spectral resolution (not yet available).
Multi photon correlation measurements (not yet available).
Optical excitation 532 nm and pulsed 515/1060 nm (80 MHz), optical detection with temporal resolution ≥1 ps and simultaneous spectral resolution ~10nm (≥0.05 nm non-simultaneous).
Sample compatibility and preparation
Flag-style sample holders.
In-situ ion-sputtering, MBE, OMBE (masks, wedges), CVD, LEED, AES, QCM balance.
In-situ resistive (e-beam) annealing up to 1273K (1500K).
In-situ cooling down to 10K.
Compatible with UHV-suitcase.
Possibility to navigate the tip with ~5 µm optical resolution.
Low-temperature UHV photon-SPM
CreaTec Fischer & Co. GmbH scanning probe microscope (SPM) operating at 4.7 K, under ultra-high vacuum (UHV) conditions, equipped magnetic field (1 T out of plane), RF excitation/readout line and piezo-controlled parabolic mirrors to enable tip-enhanced optical spectroscopies with time resolution. For this purpose, the SPM is coupled to optical injection and collection setups. These include a continuous wave laser (Hübner Cobolt, 532 nm) and a spectrometer (Andor Kymera 328i) coupled to a CCD camera (Andor iDUS 401, 300 – 1000 nm) for steady state measurements, and a femtopulsed laser (Light Conversion Flint, 1030/ 515 nm, 120 fs, 80 MHz) and a spectrometer coupled to a streak camera (Hamamatsu C16910, time resolution ~ 800 fs, 250 – 800 nm) for time-resolved measurements.
Train of ultra-fast pulses measured with spectral resolution by the streak camera.
Atomically resolved image of an Au(111) surface measured by the LT-STM.
STM-induced luminescence from an Ag tip on Au(111) nanocavity at varying bias voltages.
Optical navigation of the SPM tip/sensor on an Au(111) surface.