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29 Mar 1999

Volume 74, Issue 13, pp. 1785-1922

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Optical properties of SrS:Cu,Ag two-component phosphors for electroluminescent devices

W. Park, T. C. Jones, and C. J. Summers

Appl. Phys. Lett. 74, 1785 (1999); http://dx.doi.org/10.1063/1.123085 (3 pages) | Cited 19 times

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The luminescence characteristics of a two-component electroluminescent (EL) phosphor, SrS:Cu,Ag, were investigated by optical spectroscopy. Motivated by the discovery of efficient EL from SrS:Cu, SrS:Ag was investigated but exhibited poor EL emission, even though it showed a superior blue color. Thus, SrS:Cu,Ag samples were prepared in order to investigate if the Ag luminescence could be sensitized to produce a more efficient and saturated blue EL phosphor. A detailed spectroscopic study on SrS:Cu,Ag revealed that the emission characteristics of SrS:Cu,Ag were identical to SrS:Ag, whereas the excitation spectra resembled SrS:Cu. These results demonstrated the efficient energy transfer from Cu to Ag, confirming the successful sensitization. © 1999 American Institute of Physics.
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78.60.Fi Electroluminescence

Continuous wave laser radiation at 669 nm from a self-frequency-doubled laser of YAl3(BO3)4:Nd3+

D. Jaque, J. Capmany, and J. García Solé

Appl. Phys. Lett. 74, 1788 (1999); http://dx.doi.org/10.1063/1.123086 (3 pages) | Cited 24 times

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We report on continuous-wave red laser radiation at 669 nm from a self-frequency-doubled laser of YAl3(BO3)4:Nd3+ operating at a fundamental wavelength of 1338 nm in the 4F3/2→4I13/2 laser channel of Nd3+ ion. Main laser characteristics at the fundamental wavelength are investigated as well as second harmonic generation properties. In nonoptimal preliminary experiments, 1 mW of red radiation is obtained for 900 mW pump power from a Ti:sapphire laser. © 1999 American Institute of Physics.
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42.55.Rz Doped-insulator lasers and other solid state lasers
42.65.Ky Frequency conversion; harmonic generation, including higher-order harmonic generation

Ultrafast nonlinear subwavelength solid immersion spectroscopy at T = 8 K

Martin Vollmer, Harald Giessen, Wolfgang Stolz, Wolfgang W. Rühle, Luke Ghislain, and Virgil Elings

Appl. Phys. Lett. 74, 1791 (1999); http://dx.doi.org/10.1063/1.123087 (3 pages) | Cited 24 times

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Pump–probe measurements with a subwavelength spatial resolution of 355 nm and a temporal resolution of 130 fs have been performed in a multiple quantum well sample at T = 8 K. A solid immersion lens was used to increase the spatial resolution to 0.41⋅λ and the effective numerical aperture to 1.23, demonstrating that the limit of conventional microscopy has been surpassed. The lateral carrier transport was investigated on subpicosecond timescales. © 1999 American Institute of Physics.
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07.57.Ty Infrared spectrometers, auxiliary equipment, and techniques
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
78.47.-p Spectroscopy of solid state dynamics
42.79.Bh Lenses, prisms and mirrors
42.65.-k Nonlinear optics
78.66.Fd III-V semiconductors

Birefringent thin-film polarizers for use at normal incidence and with planar technologies

Ian Hodgkinson and Qi Hong Wu

Appl. Phys. Lett. 74, 1794 (1999); http://dx.doi.org/10.1063/1.123088 (3 pages) | Cited 19 times

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We discuss the design and fabrication of an all-dielectric thin-film polarizer that is compatible with existing planar technologies. This polarizer consists of a stack of quarter-wave biaxial layers. Each quarter-wave layer is formed by reactive electron-beam evaporation, using a bideposition technique that causes a columnar structure to grow perpendicular to the substrate, produces large normal-incidence linear birefringence, and avoids thickness wedging that is inherent in tilted-columnar biaxial layers. p-polarized light that is incident on the polarizer encounters an index-matched stack and is transmitted, whereas s-polarized light is rejected by a coexisting high-reflectance stack. A fabrication figure-of-merit of ten film periods per decade in the extinction ratio has been achieved in practice for a titanium oxide/tantalum oxide polarizer. © 1999 American Institute of Physics.
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42.79.Ci Filters, zone plates, and polarizers
78.20.Fm Birefringence
42.79.Wc Optical coatings
42.86.+b Optical workshop techniques
78.66.Nk Insulators
81.15.-z Methods of deposition of films and coatings; film growth and epitaxy

Infrared imaging camera based on a Rydberg atom photodetector

Marcel Drabbels and L. D. Noordam

Appl. Phys. Lett. 74, 1797 (1999); http://dx.doi.org/10.1063/1.123089 (3 pages) | Cited 6 times

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A type of infrared imaging camera is demonstrated that uses gas-phase Rydberg atoms as photocathodes. The camera operates throughout the infrared part of the electromagnetic spectrum: λ = 1–100 μm. The first results are presented and the potential of the camera as an ultrafast detector and a wavelength selective detector is discussed. © 1999 American Institute of Physics.
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42.79.Pw Imaging detectors and sensors
07.57.Kp Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors
85.60.Gz Photodetectors (including infrared and CCD detectors)
32.80.Fb Photoionization of atoms and ions
06.60.Jn High-speed techniques (microsecond to femtosecond)
85.60.Ha Photomultipliers; phototubes and photocathodes

Surface electromagnetic wave excitation on one-dimensional photonic band-gap arrays

W. M. Robertson and M. S. May

Appl. Phys. Lett. 74, 1800 (1999); http://dx.doi.org/10.1063/1.123090 (3 pages) | Cited 15 times

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Experiments are described on the prism-coupled excitation of surface electromagnetic waves in one-dimensional photonic band-gap arrays. The low loss of photonic band-gap materials leads to narrow angular reflectivity resonances and high surface fields. These attributes, coupled with the ability to engineer the optical properties of photonic band-gap arrays, suggest these materials as powerful replacements for metal films in many applications that make use of surface-plasmon resonance. © 1999 American Institute of Physics.
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42.70.Qs Photonic bandgap materials
73.20.Mf Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
42.79.Bh Lenses, prisms and mirrors
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