The University of Hong KongThe University of Hong Kong
University Central Facilities
Interdisciplinary and Core Research Facilities

  1. Facilities
  2. Materials Charaterization Laboratory (Optical)

J A Woollam RC2
Ellipsometer

The RC2 ellipsometer features dual rotating compensator technology, making it a versatile solution for various applications in spectroscopic ellipsometry and Mueller matrix ellipsometry. It operates across a wide wavelength range, from ultraviolet (down to 210 nm) to extended near-infrared (up to 2500 nm).

Attachments / Specifications:

- Fully automated sample translation or rotation stage for 300 x 300 mm mapping
- Automated variable angle transmission stage for transmission measurements
- Linkam Temperature Stage (Temperature range: -70°C to 600°C)

Person-in-charge:

Mr. Chan Y. F. Frankie - emuchan@hku.hk
Dr. Mo X. Y. Wing - wingxymo@hku.hk

Project/ Fund Source:

UDF(2020/21) 020100097, Optical Characterization Facility

Agilent Cary 5000
UV-VIS-NIR Spectrophotometer

Agilent Cary 5000 UV-VIS-NIR Spectrophotometer deliveries the measurements of transmission and reflection in the UV, visible, and near-IR (190 nm to 3300 nm). Modes of measurement include absolute specular reflection, diffuse scattering, . glossy scattering, direct transmission, scattered transmission and
partial scattered transmission.

Attachments / Specifications:

- UV-Vis Detector: R928 PMT (190 nm - 900 nm) R928 PMT Performance
- NIR Detector: Cooled PbS (760 nm - 3300 nm)
- Agilent Cary Universal Measurement Accessory (UMA)
- Agilent diffuse reflectance accessory (Integrating spheres): measurement range 250 nm - 2500 nm (R928 PMT and Cooled PbS)

Person-in-charge:

Mr. Chan Y. F. Frankie - emuchan@hku.hk
Dr. Mo X. Y. Wing - wingxymo@hku.hk

Project/ Fund Source:

UDF(2020/21) 020100097, Optical Characterization Facility

Edinburgh FLS1000
Steady State & Time-resolved Photoluminescence Spectrometer

Edinburgh FLS1000 is a modular fluorescence and phosphorescence spectrometer for measuring spectra from the ultraviolet to the mid-infrared spectral range (up to 5,500 nm), and lifetimes spanning from picoseconds to seconds. Mode of Operation included spectral (Single Photon Counting), phosphorescence lifetime (Time-Resolved, Single Photon Counting, Multi-Channel Scaling) and fluorescence lifetime (Time-Correlated, Single Photon Counting)

Attachments / Specifications:

- Excitation sources (Continous sources): Xenon Arc Lamp (230 nm to >1000 nm)
- Excitation sources (Microsecond Flashlamp sources): Pulsed Xenon Flashlamp (200nm to >1000 nm, up to 100Hz)
- Excitation sources (Picosecond pulsed diode laser): 375nm (65ps @10MHz), 450nm (90ps @10MHz)
- Excitation sources (Picosecond pulsed light emitting diodes): 260nm (90ps @10MHz), 300nm (1000ps @10MHz)
- Detector: NIR-PMT (300 nm - 1700 nm, response with: 800ps) PMT-1700 Performance
- Detector: PMT (185 - 900nm [recommended for operation at 200nm – 870nm], lifetime range: 100ps to 50us) PMT-900 Performance
- Double monochromators (Excitation and Emission)
- Gated Photomultiplier Circuit
- Integrating Sphere
- Liquid Nitrogen Cryostat (77K - 500K)
- Liquid Nitrogen EPR Dewar (Fixed Temperature: 77K)

Person-in-charge:

Mr. Chan Y. F. Frankie - emuchan@hku.hk
Dr. Mo X. Y. Wing - wingxymo@hku.hk

Project/ Fund Source:

UDF(2020/21) 020100097, Optical Characterization Facility

Attolight Allalin
Time-resolved Cathodoluminescence Scanning Electron Microscope

The Allalin is a nanometer resolution spectroscopy instrument, based on a disruptive technology known as
quantitative cathodoluminescence that integrates a light microscope and a scanning electron microscope
(SEM) into one tool. The Allalin allows for “No Compromise” large field /fast scanning simultaneous SEM
imaging with hyperspectral or panchromatic CL maps.

Attachments / Specifications:

- UV-Visible detector: Andor Newton, 200 - 1060 nm
- Streak Camera (Time resolved multichannel detector):
- | Optronis OptoScope SC-10/S25 (Photocathode sensitivity over the range 200 - 900 nm ) OptoScope SC-10/S25 Performance
- | Temporal resolution: < 2 ps (neglecting dispersion of spectrometer)
- | Timebase: 300 ps – 2 ns
- | UV and visible range input optics, IOU-10
- | Synchroscan sweep unit, SSU11-10 (Synchroscan frequency: 80 MHz)
- Nano-positioning stage including:
- Smaract Nanoprobes station (2 nanoprobes for electrical contacting)
- Liquid Helium Cryostat Temperature from 10 to 320 K with precision 0.1K
- Electron Beam Induced Current / Electron Beam Absorbed Current / Resistive Contrast Imaging
- Imina Nanoprobes Stage (4 miBot robots)

Person-in-charge:

Mr. Chan Y. F. Frankie - emuchan@hku.hk

Project/ Fund Source:

LREF(2022/23) 207300021, Time-resolved cathodoluminescence spectroscopy platform

Zeiss Axio Imager A.2m
Optical Microscope

ZEISS Axio Imager A.2m is a premium upright microscope engineered for materials research and industrial quality control. It provides outstanding image contrast and resolution, supports brightfield, darkfield, DIC, polarized light, and reflected-light imaging, and enables precise analysis, documentation, and characterization of microstructures and material defects.


Person-in-charge:

Dr. Mo X. Y. Wing - wingxymo@hku.hk