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DTSTART:20250330T030000
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DTSTAMP:20260424T143251Z
UID:1736416800@ist.ac.at
DTSTART:20250109T110000
DTEND:20250109T120000
DESCRIPTION:Speaker: Hendrik Utzat\nhosted by Maria Ibáñez\nAbstract: Sol
 id-state emitters of single photons serve as testbeds for studying fundame
 ntal condensed matter dynamics and are increasingly appealing for various 
 applications. I highlight recent advances in both the materials science of
  single-photon emitters and the spectroscopic methods used for their chara
 cterization. Lead-halide perovskite quantum dots (PQDs) exhibit highly coh
 erent optical emission at low temperatures [1]. I outline the latest devel
 opments in perovskite quantum emitters\, including our first demonstration
  of two-photon (Hong-Ou-Mandel) interference from sequentially emitted sin
 gle photons. We achieved visibilities of up to 0.55\, surpassing the thres
 hold for genuine quantum interference\, even without cavity acceleration o
 f the emission. This indicates that entangled-photon generation is indeed 
 feasible with perovskites [2]. Additionally\, advancements in quantum defe
 ct spectroscopy using combined optical and electron-beam methods will be p
 resented [3]. These developments also include a novel all-optical super-re
 solution concept based on spatio-temporal time-frequency photon-correlatio
 n functions. This Spectral Fluctuation Super-Resolution (SFSR) technique i
 s effective for non-blinking emitters and stochastic spectral fluctuations
  with arbitrary temporal statistics\, suggesting its utility in super-reso
 lution microscopy of quantum emitters at low temperatures\, where spectral
  diffusion is often more prominent than emitter blinking\, as used in alte
 rnative optical fluctuation microscopy. [1] Science\, 2019\, 363 (6431)\,
  1068-1072.[2] Nat. Photon.\, 2023\, 17\, 775–780.[3] PNAS\, 2024\, 121
  (14) e2308247121. 
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:Rita.Pacarada@ist.ac.at
SUMMARY:Hendrik Utzat: New Methods and Materials in Quantum Emitter Science
  
URL:https://talks-calendar.ista.ac.at/events/5229
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