Photoluminescence (PL) and its temporal dynamics constitute one of the most fundamental techniques for uncovering fundamental physical properties of nanomaterials and their coupling to the environment.
Capabilities include:
- Multiple time-resolved photoluminescence (TRPL) systems covering wide range of excitation and detection spectral range, a large span of time scale (150 femtoseconds–milliseconds), wide temperature ranges (3 K–400 K) and sample configurations (single nanostructure and ensemble as well as different chemical and electrochemical environments).
Equipment includes:
- Coherent Ti-sapphire laser oscillator (>3.5 W average power) in conjunction with doubler and tripler attachments and pulse picker.
- Coherent Chameleon Ti-Sapphire Laser coupled to Mira OPO.
- Continuum ps light source (IChrome TVIS tunable from 480 nm–650 nm, 3 ps pulse width.
- Hamamatsu Streak Camera capable of time resolution and spectral range.
- Multiple Si based single photon counting modules (time resolution: 50 ps, Spectral range: 400 nm–1000 nm).
- InGaAs based single photon counting modules.
- Superconducting Nanowire Single Photon Detector (time resolution: <50 ps, Spectral range: 800 nm–1500 nm).
- Fluorescence upconversion system from Ultrafast Systems — mixes the fluorescence from the sample with an intense beam from the Ti-Sapphire laser and photon counting to obtain time-resolved PL from the visible to the near IR.
Contact: Prashant Padmanabhan
Research Highlight:
Manipulation of Exciton Dynamics in Single-Layer WSe2 Using a Toroidal Dielectric Metasurface
Yuan, L.; Jeong, J.; Chi Kwock, K. W.; Yanev, E. S.; Grandel, M.; Rhodes, D. A.; Luk, T. S.; Schuck, P. J.; Yarotski, D.; Hone, J. C.; Brener, I.; Prasankumar, R. P. Nano Letters 2021, 21 (23), 9930–9938. doi.org/10.1021/acs.nanolett.1c03189
