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All-optical control of charge-trapping defects in rare-earth doped oxides

Journal Article · · Nanophotonics
 [1];  [1];  [2];  [1]
  1. Pritzker School of Molecular Engineering , 2462 The University of Chicago , Chicago , IL 60637 , USA
  2. Corning Research & Development Corporation , Sullivan Park, Painted Post , New York , 14870 , USA
Abstract

Charge-trapping defects in crystalline solids play important roles in applications ranging from microelectronics, optical storage, sensing and quantum technologies. On one hand, depleting trapped charges in the host matrix reduces charge noise and enhances coherence of solid-state quantum emitters. On the other hand, stable charge traps can enable high-density optical storage systems. Here we report all-optical control of charge-trapping defects via optical charge trapping (OCT) spectroscopy of a rare-earth ion doped oxide (Y 2 O 3 ). Charge trapping is realized by low intensity optical excitation in the 200–375 nm range. Charge detrapping or depletion is carried out by optically stimulated luminescence (OSL) under 532 nm stimulation. Using a Pr-doped Y 2 O 3 polycrystalline ceramic host matrix, we observe charging pathways via the inter-band optical absorption of Y 2 O 3 and via the 4f-5d transitions of Pr 3+ . We demonstrate effective control of the density of trapped charges within the Y 2 O 3 matrix at ambient environment. These results point to a viable method for controlling the local charge environment in rare-earth doped crystals via all-optical means, and pave the way for further development of efficient optical storage technologies with ultrahigh storage capacity, as well as for the localized control of quantum coherence in rare-earth doped solids.

Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2516771
Journal Information:
Nanophotonics, Journal Name: Nanophotonics; ISSN 2192-8606
Publisher:
Walter de Gruyter GmbHCopyright Statement
Country of Publication:
Germany
Language:
English

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