Investigating Single-molecule Optoelectronics with STM Induced Luminescence Technique

日期:2019-04-01 阅读:525


Scanning tunneling microscope (STM) induced luminescence (STML), a technique combining STM with optical detection, not only possesses the ability of atomic-resolution imaging and single-molecule manipulation, but also provides the access to probe the optical properties of molecules through the electroluminescence under highly localized excitation of tunneling electrons. In this talk, I shall first present the realization of molecule-specific electroluminescence from a well- single molecule by using a combined strategy of fluorescence quenching suppression and plasmonic enhancement. Then, I shall demonstrate the visualization of coherent intermolecular dipole-dipole coupling for constructed molecular dimer in real space through spectrally and spatially resolved photon imaging. With the combination of STML with Hanbury Brown and Twiss interferometry, electrically driven single-photon superradiance from artificially constructed molecular chains is realized. Furthermore, I will also show the capability of STML of revealing the spatially resolved vibronic coupling features within a single molecule. These results will not only deepen our understanding on the optoelectronic behavior of single molecule in a plasmonic field, but also pave the way for the development of quantum light sources and nanoscale optoelectronic integrations.



Prof. Yang Zhang (张杨) received his B. Sc. and Ph. D. degrees from University of Science and Technology of China in 2004 and 2010, respectively. From November 2010 to July 2013, he worked as a postdoctoral researcher in the French National Centre for Scientific Research (CNRS). He joined in University of Science and Technology of China as a faculty member in August 2013. His research interests focus on the development of sub-nanometer resolved tip enhanced optical spectroscopy and single-molecule optoelectronics. He has published more than 20 papers in SCI journals, including Nature, Nature communications, etc. He received the Outstanding Young Fund by NSFC in 2016.


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