Highly efficient infrared-to-visible energy upconversion in Er^3+:Y_2O_3

Kapoor, R.; Friend, Christopher S.; Biswas, Arkoprovo; Prasad, Paras N.

doi:10.1364/ol.25.000338

Cited by 94 publications

(74 citation statements)

References 9 publications

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“…The excitation of an Er 3+ ion from one transition state to another one with higher energy as a consequence of the interaction with a neighboring erbium becomes critical at high fluxes [22]. This effect was experimentally proved in our devices by collecting the visible spectrum when the polarization current applied is increased, as can be observed in Fig.…”

Section: Limiting Factors Of Er 3+ Ionssupporting

confidence: 57%

Polarization strategies to improve the emission of Si-based light sources emitting at 1.55 μm

Ramírez¹,

Jambois²,

Berencén³

et al. 2012

Materials Science and Engineering: B

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a b s t r a c tWe present a electroluminescence (EL) study of the Si-rich silicon oxide (SRSO) LEDs with and without Er 3+ ions under different polarization schemes: direct current (DC) and pulsed voltage (PV). The power efficiency of the devices and their main optical limitations are presented. We show that under PV polarization scheme, the devices achieve one order of magnitude superior performance in comparison with DC. Time-resolved measurements have shown that this enhancement is met only for active layers in which annealing temperature is high enough (>1000 • C) for silicon nanocrystal (Si-nc) formation. Modeling of the system with rate equations has been done and excitation cross-sections for both Si-nc and Er 3+ ions have been extracted.

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Section: Limiting Factors Of Er 3+ Ionssupporting

confidence: 57%

Polarization strategies to improve the emission of Si-based light sources emitting at 1.55 μm

Ramírez¹,

Jambois²,

Berencén³

et al. 2012

Materials Science and Engineering: B

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“…The sensitization of Er 3+ with Yb 3+ is a popular method to increase optical pumping efficiency due to large absorption cross-section of Yb 3+ and efficient energy transfer from Yb 3+ to Er 3+ [5][6][7][8][9]. However, host material also plays a key role in obtaining highly efficient upconversion luminescence [10]. So far, much effort has been put into fluoride and fluoride glass systems owning to their low phonon energy [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of up-conversion luminescence in Zn2SiO4:Yb3+, Er3+ by co-doping with Li+ or Bi3+

et al. 2012

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Yb 3+ /Er 3+ co-doped Zn 2 SiO 4 ceramics are rapidly synthesized by the microwave radiation method. Green and red up-conversion emissions are observed in Zn 2 SiO 4 : Yb 3+ , Er 3+ ceramics under 980 nm excitation. The influence of co-doped Li + or Bi 3+ ion on luminescence intensity for the phosphors has been investigated. At Li + or Bi 3+ doping concentration of 1 mol%, up-converted green emission can be increased by 6 times and 20 times, respectively. It is believed that co-doped Li + or Bi 3+ ion results in the local distortion of Er 3+ in Zn 2 SiO 4 , increasing the intra-4f transitions of Er 3+ ions. The local distortion is proved by spectral probing method with Eu 3+ .

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“…Erbium doped materials exhibit strong fluorescence and are very efficient in the visible as well as in the infrared region. 17 The visible fluorescence is caused by an upconversion process and is an undesirable effect in standard 1.5 μm telecommunication applications. 5 However, this upconversion process can be utilized in the fabrication of simple, compact lasers operating in the visible region.…”

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of yttrium oxide thin films for planar waveguiding applications

Pearce

Parker

Charlton

et al. 2010

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Thin films of yttrium oxide, Y2O3, were deposited by reactive sputtering and reactive evaporation to determine their suitability as a host for a rare earth doped planar waveguide upconversion laser. The optical properties, structure, and crystalline phase of the films were found to be dependent on the deposition method and process parameters. X-ray diffraction analysis on the “as-deposited” thin films revealed that the films vary from amorphous to highly crystalline with a small broad peak at 29° corresponding to the ⟨222⟩ reflections of Y2O3. The samples with the polycrystalline structure had a stoichiometry close to bulk cubic Y2O3. Scanning electron microscopy imaging revealed a regular column structure confirming their crystalline nature. The thin film layers which allowed guiding in both visible and infrared regions had lower refractive indices, higher oxygen content, and a more amorphous structure. Higher oxygen pressures during the deposition lead to a more amorphous layer.

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Highly efficient infrared-to-visible energy upconversion in Er^3+:Y_2O_3

Cited by 94 publications

References 9 publications

Polarization strategies to improve the emission of Si-based light sources emitting at 1.55 μm

Polarization strategies to improve the emission of Si-based light sources emitting at 1.55 μm

Enhancement of up-conversion luminescence in Zn2SiO4:Yb3+, Er3+ by co-doping with Li+ or Bi3+

Structural and optical properties of yttrium oxide thin films for planar waveguiding applications

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