Future quantum networks will allow the secure distribution of encryption keys over extended distances, blind quantum computing, and networked quantum computers and atomic clocks. I will discuss our experimental work on two key ingredients of such networks: a solid-state storage device for quantum states of light, and a detector that promises detecting the presence of photons without destroying them. Both devices employ a Thulium-doped LiNbO3 crystal cooled to a temperature of around 1K.
Wolfgang Tittel, "Rare-earth-doped crystals for quantum communications (Conference Presentation)," Proc. SPIE 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X, 101180P (Presented at SPIE OPTO: February 02, 2017; Published: 2 June 2017); https://doi.org/10.1117/12.2250386.5397361505001.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon