[Phys-seminars] 2017-11-02 Lasers Seminar

barmash barmash at bgu.ac.il
Sat Oct 28 20:04:59 IDT 2017

Lasers Seminar

 DATE: 02-11-17

 TIME: 15:30

 PLACE: Physics building (#54) room 207

Quantum-light harvesting from room temperature nano-emitters using nano-antennas

Ronen Rapaport, The Racah Institute for Physics and the Applied Physics Department, The Hebrew University of Jerusalem

Nano-emitters, either natural or artificial, are nano-objects able to emit non-classical light such as single or entangled photons. They are a potential resource for a growing host of applications in quantum technologies and quantum information sciences. A particular growing interest is in effectively harvesting light from quantum emitters operating at room temperature, such as nanocrystals quantum dots, color centers in diamond, or defect states in two-dimensional materials. An efficient, high-quality and bright photon source, yet still simple, compact, and cheap could be achieved with such room temperature emitters in principle. Yet very efficient photon harvesting could be quite tricky, as room temperature emitters usually have broad spectral and spatial emission profiles, and they are in many cases substrate-free and hard to integrate, and with inherent low emission rates and poor directionality. In this talk I will review our efforts to overcome the inherent problems of 
 room temperature nano-emitters and in particular of nanocrystal quantum dots as useful photon sources, by designing hybrid nano-emitter – nano-antenna devices that can efficiently extract and direct single or two- photon states, towards the goal of producing high-purity, bright, deterministic and heralded single photon sources on chip.

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