SFB 1432 Colloquium: Perovskite Nanocrystals as Non-Classical Light Sources: From Single Photon Emission to Superfluorescence
Time
Thursday, 25. May 2023
15:15 - 16:30
Location
P603 - refreshment afterwards
Organizer
SFB 1432 / Dr. R. Tenne
Speaker:
Dr. Gabriele Rainò, ETH Zürich
Besides conventional optoelectronic devices (LEDs and laser), colloidal nanocrystals (NCs) are pursued as non-classical light sources (i.e. single photon emitters) that might play a pivotal role in future quantum technologies, such as quantum cryptography and quantum sensing. Due to strongly reduced charge trapping on surface states and their defect-tolerant character, perovskite NCs become attractive as alternative quantum light sources. Indeed, very stable, blinking-free emission1 has been observed at cryogenic temperatures with ultrafast (ca. 200 ps) radiative lifetime2 and long exciton dephasing time3. In addition, when organized in highly-ordered three-dimensional superlattices, perovskite NCs exhibit superfluorescence (SF)4,5, a cooperative emission of individual emitters that arises due to a coherent collective coupling to a common light field. The talk will review our recent achievements in the exploration of perovskite NCs as non-classical light sources and future developments.
References:
[1] G. Rainò et al., ACS Nano (2016), 10, 2485–2490.
[2] M. Becker et al., Nature (2018), 553, 189–193.
[3] M. Becker et al., Nanoletters (2018), 7546–7551.
[4] G. Rainò et al., Nature (2018), 563, 671–675.
[5] I. Cherniukh et al., Nature (2021), 593, 535–542
