Optical characterization and crystal field calculations for some erbium based solid state materials for laser refrigeration

Z. Hasan; Z. Qiu; Jackie Johnson; Uwe Homerick

doi:10.1117/12.815248

19 February 2009 Optical characterization and crystal field calculations for some erbium based solid state materials for laser refrigeration

Z. Hasan, Z. Qiu, Jackie Johnson, Uwe Homerick

Author Affiliations +

Proceedings Volume 7228, Laser Refrigeration of Solids II; 72280H (2009) https://doi.org/10.1117/12.815248
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

The potential of three erbium based solids hosts has been investigated for laser cooling. Absorption and emission spectra have been studied for the low lying IR transitions of erbium that are relevant to recent reports of cooling using the ⁴I_15/2-⁴I_9/2 and⁴I_15/2 -⁴I_13/2 transitions. Experimental studies have been performed for erbium in three hosts; ZBLAN glass and KPb₂Cl₅ and Cs₂NaYCl₆ crystals. In order to estimate the efficiencies of cooling, theoretical calculations have been performed for the cubic Elpasolite (Cs₂NaYCl₆ ) crystal. These calculations also provide a first principle insight into the cooling efficiency for non-cubic and glassy hosts where such calculations are not possible.

Citation Download Citation

Z. Hasan, Z. Qiu, Jackie Johnson, and Uwe Homerick "Optical characterization and crystal field calculations for some erbium based solid state materials for laser refrigeration", Proc. SPIE 7228, Laser Refrigeration of Solids II, 72280H (19 February 2009); https://doi.org/10.1117/12.815248

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