Gain and Absorption Spectra of Quantum Wire Lasers Diodes Grown on Nonplanar Substrates, (9999)
Walther, M., Kapon, E, Scherer, A, Song, H., Hwang, D. M.
Quantum wire (QWR) semiconductor lasers, grown by organometallic chemical vapor deposition OMCVD) on nonplanar substrates, exhibit two dimensional (2D) quantum confinement and sub-mA threshold...
Soole, J. B., Scherer, A, Silberberg, Y., LeBlanc, H. P., Andreadakis, N. C.
We report a grating based wavelength demultiplexer monolithically integrated with a high density, 92 element, p-i-n detector array. A novel waveguide/detector coupling geometry is also demonstrated.
Photodetection in silicon beyond the band edge with surface states (2008)
Baehr-Jones, T., Hochberg, M., Scherer, A.
Silicon is an extremely attractive material platform for integrated optics at telecommunications wavelengths, particularly for integration with CMOS circuits. Developing detectors and electrically...
Baehr-Jones, T., Hochberg, M., Soref, Richard, Scherer, A.
We describe the design of a silicon-based source for radiation in the 0.5-14 THz regime. This new class of devices will permit continuously tunable, milliwatt scale, cw, room temperature operation, a...
Photodetection in silicon beyond the band edge with surface states (2007)
Baehr-Jones, T., Hochberg, M., Scherer, A.
Silicon is an extremely attractive material platform for integrated optics at telecommunications wavelengths, particularly for integration with CMOS circuits. Developing detectors and electrically...
Implementation of glycemic control – problems and solutions (2007)
Halbeck, E, Jaschinski, U, Scherer, A, Aulmann, A, Lichtwarck-Aschoff, M, Forst, H
No abstract available.
Planar Atom Trap and Magnetic Resonance 'Lens' Designs (2007)
Barbic, M., Barrett, C. P., Emery, T. H., Scherer, A.
We present various planar magnetic designs that create points above the plane where the magnitude of the static magnetic field is a local minimum. Structures with these properties are of interest in...
Quantum dot photonic-crystal-slab nanocavities: Quality factors and lasing (2005)
Hendrickson, J., Richards, B. C., Sweet, J., Mosor, S., Christenson, C., Lam, D., ...
Emission linewidths of quantum dot photonic-crystal-slab nanocavities are measured as a function of temperature and fabrication parameters with low-power and high-power, cw and pulsed, nonresonant...
Scanning a photonic crystal slab nanocavity by condensation of xenon (2005)
Mosor, S., Hendrickson, J., Richards, B. C., Sweet, J., Khitrova, G., Gibbs, H. M., ...
Allowing xenon or nitrogen gas to condense onto a photonic crystal slab nanocavity maintained at 10–20 K results in shifts of the nanocavity mode wavelength by as much as 5 nm (~=4 meV). This...
Polydimethylsiloxane based microfluidic diode (2005)
Adams, M. L., Johnston, M. L., Scherer, A., Quake, S. R.
In this paper, we present a novel elastomer-based microfluidic device for rectifying flow. The device is analogous to an electronic diode in function since it allows flow in one direction and stops...
Analysis of Radiation-Pressure Induced Mechanical Oscillation of an Optical Microcavity (2005)
Kippenberg, T. J., Rokhsari, H., Carmon, T., Scherer, A., Vahala, K. J.
The theoretical work of Braginsky predicted that radiation pressure can couple the mechanical, mirror eigenmodes of a Fabry-Pérot resonator to its optical modes, leading to a parametric oscillation...
Optical modulation and detection in slotted Silicon waveguides (2005)
Baehr-Jones, T., Hochberg, M., Wang, Guangxi, Lawson, R., Liao, Y., Sullivan, P. A., ...
We demonstrate a novel mechanism for low power optical detection and modulation in a slotted waveguide geometry filled with nonlinear electro-optic polymers. The nanoscale confinement of the optical...
Analysis of radiation-pressure induced mechanical oscillation of an optical microcavity (2005)
Kippenberg, T. J., Rokhsari, H., Carmon, T., Scherer, A., Vahala, K. J.
The theoretical work of V.B. Braginsky predicted that radiation pressure can couple the mechanical, mirror-eigenmodes of a Fabry-Perot resonator to it's optical modes, leading to a parametric...
Three-dimensional macroporous silicon photonic crystal with large photonic band gap (2005)
Schilling, J., White, J., Scherer, A., Stupian, G., Hillebrand, R., Gösele, U.
Three-dimensional photonic crystals based on macroporous silicon are fabricated by photoelectrochemical etching and subsequent focused-ion-beam drilling. Reflection measurements show a high...
Three-dimensional macroporous silicon photonic crystal with large photonic band gap (2005)
Schilling, J., White, J., Scherer, A., Stupian, G., Hillebrand, R., Gösele, U.
Accelerated Lifetime Testing and Failure Analysis of Quartz Based GaAs Planar Schottky Diodes (2004)
Lin, R., Mehdi, I., Pease, A., Dengler, R., Humphrey, D., Lee, T., ...
Accelerated lifetime tests have been performed on intergrated planar GaAs Schottky diodes that were bonded to quartz substrates up-side-down with a heat-cured epoxy.
Elemental Surface Analysis at Ambient Pressure (2004)
Feldman, J., Wilcox, J., George, T., Barsic, D., Scherer, A.
The development of a portable surface elemental analysis tool based on the excitation of characteristics x-rays at ambient pressure with an electron beam is described.
Low-threshold photonic crystal laser (2004)
Gogna, P., Loncar, M., Yoshie, T., Scherer, A., Qiu, Y., Loncar, M.
We have fabricated photonic crystal nanocavity lasers, based on a new high-quality factor design that incorporates fractional edge dislocations.
Microfluidic ion mobility chromatograph (2004)
Svehla, D., Choi, D., Grunthaner, F., Feldman, S., Barsic, D., Scherer, A.
This paper describes the development of a microfluidic ion mobility chromatograph for small inorganic ion analysis.
Macroporous silicon membranes as electron and x-ray transmissive windows (2004)
Schilling, J., Scherer, A., Gösele, U., Kolbe, M.
Macroporous silicon membranes are fabricated whose pores are terminated with 60 nm thin silicon dioxide shells. The transmission of electrons with energies of 5 kV-25 kV through these membranes was...
Macroporous silicon membranes as electron and x-ray transmissive windows (2004)
Schilling, J., Scherer, A., Gösele, U., Kolbe, M.
Macroporous silicon membranes are fabricated whose pores are terminated with 60 nm thin silicon dioxide shells. The transmission of electrons with energies of 5 kV-25 kV through these membranes was...
Activation-threshold tuning in an affinity model for the T-cell repertoire (2004)
Scherer, A., Noest, A., Boer, R.J. De
Naive T cells respond to peptides from foreign proteins and remain tolerant to self peptides from endogenous proteins. It has been suggested that self tolerance comes about by a 'tuning' mechanism,...
Quantifiable cytotoxic T lymphocyte responses and HLA-related risk of progression to AIDS (2004)
Scherer, A., Frater, J., Oxenius, A., Agudelo, J., Price, D.A., Günthard, H.F., ...
Nanowire-based very-high-frequency electromechanical resonator (2003)
Husain, A., Hone, J., Postma, Henk W. Ch., Huang, X. M. H., Drake, T., Barbic, M., ...
Fabrication and readout of devices with progressively smaller size, ultimately down to the molecular scale, is critical for the development of very-high-frequency nanoelectromechanical systems...
Quantum dot photonic crystal lasers (2002)
Yoshie, T., Shchekin, O. B., Chen, H., Deppe, D. G., Scherer, A.
Coupled cavity designs on two-dimensional square lattice photonic crystal slabs were used to demonstrate optically pumped indium arsenide quantum dot photonic crystal lasers at room temperature....
Lithographic tuning of a two-dimensional photonic crystal laser array (2000)
Painter, O., Husain, A., Scherer, A., Lee, P. T., Kim, I., O'Brien, J. D., ...
One attraction of photonic crystals is the ability to control optical device characterstics by lithographically varying the geometry. In this letter we demonstrate a 10 x 10 array of optically pumped...
Adibi, A., Lee, R. K., Xu, Y., Yariv, A., Scherer, A.
The authors present a systematic method for designing dielectric-core photonic crystal optical waveguides that support only one mode in the photonic bandgap (PBG). It is shown that by changing the...
Boroditsky, M., Gontijo, I., Jackson, M., Vrijen, R., Yablonovitch, E., Krauss, T., ...
Surface recombination is an important characteristic of an optoelectronic material. Although surface recombination is a limiting factor for very small devices it has not been studied intensively. We...
An Evaluation of Adaptive Execution of OpenMP Task Parallel Programs (2000)
Scherer, A., Gross, T., Zwaenepoel, W.
We present a system that allows task parallel OpenMP pro grams to execute on a network of workstations (NOW) with a variable number of nodes Such adaptivity, generally called adaptive parallelism, is...
Room temperature photonic crystal defect lasers at near-infrared wavelengths in InGaAsP (1999)
Painter, O. J., Husain, A., Scherer, A., O'Brien, J. D., Kim, I., Dapkus, P. D.
Room temperature lasing from optically pumped single defects in a two-dimensional (2-D) photonic bandgap (PBG) crystal is demonstrated. The high-Q optical microcavities are formed by etching a...
Photonic bandgap disk laser (1999)
Lee, R. K., Painter, O. J., Kitzke, B., Scherer, A., Yariv, A.
A two-dimensional photonic crystal defined hexagonal disk laser which relies on Bragg reflection rather than the total internal reflection as in traditional microdisk lasers is described. The devices...
Lee, R. K., Painter, O. J., D'Urso, B., Scherer, A., Yariv, A.
An active, photonic band gap-based microcavity emitter in the near infrared is demonstrated. We present direct measurement of the spontaneous emission power and spectrum from a microcavity formed...
Finite-difference time-domain calculation of spontaneous emission lifetime in a microcavity (1999)
Xu, Y., Vučković, J. S., Lee, R. K., Painter, O. J., Scherer, A., Yariv, A.
We developed a general numerical method to calculate the spontaneous emission lifetime in an arbitrary microcavity, using a finite-difference time-domain algorithm. For structures with rotational...
Transparent Adaptive Parallelism on NOWs using OpenMP (1999)
Scherer, A., Lu, H., Gross, T., Zwaenepoel, W.
We present a system that allows OpenMP programs to execute on a network of workstations with a variable number of nodes. The ability to adapt to a variable number of nodes allows a program to take...
Fabrication of high-density nanostructures by electron beam lithography (1998)
Dial, O., Cheng, C. C., Scherer, A.
We demonstrate a fabrication method to define high-density, uniform nanostructures by electron beam lithography at conventional beam voltages (< 40 kV). Here we optimize the exposure and development...
InGaAsP photonic band gap crystal membrane microresonators (1998)
Scherer, A., Painter, O., D'Urso, B., Lee, R., Yariv, A.
We have microfabricated two-dimensional (2D) photonic band gap structures in a thin slab of dielectric material to define reflectors and high-Q microresonators. By selectively omitting holes from the...
Quantum Device Technologies - Applying 2-D Photonic Crystals (1998)
Fainman, Y., Scherer, A., Sham, L. J., Tu, C. W.
The project is focused in theory, fabrication and characterization of quantum information processing devices manipulating q-bits. Strong coupling between quantum dots and high-Q cavity was...
MR head response from arrays of lithographically patterned perpendicular nickel columns (1997)
Yamamoto, S. Y., O'Barr, R., Schultz, S., Scherer, A.
We report, for the first time, the MR head response from lithographically patterned perpendicular nickel columns. Electron-beam lithography is used to fabricate arrays of Ni columns, 400 nm tall and...
Composite fermions in periodic and random antidot lattices (1997)
Smet, J. H., Weiss, D., Von Klitzing, K., Coleridge, P. T., Wasilewski, Z. W., Bergmann, R., ...
The longitudinal and Hall magnetoresistance of random and periodic arrays of artificial scatterers, imposed on a high-mobility two-dimensional electron gas, were investigated in the vicinity of...
Lasers incorporating 2D photonic bandgap mirrors (1996)
O'Brien, J., Painter, O., Lee, R., Cheng, C. C., Scherer, A., Yariv, A.
Semiconductor lasers incorporating a 2D photonic lattice as a one end mirror in a Fabry-Perot cavity are demonstrated. The photonic lattice is a 2D hexagonal close-packed array with a lattice...
Lithographic band gap tuning in photonic band gap crystals (1996)
Cheng, C. C., Scherer, A., Arbet-Engels, V., Yablonovitch, E.
We describe the lithographic control over the spectral response of three-dimensional photonic crystals. By precise microfabrication of the geometry using a reproducible and reliable procedure...
Preparation and quantitative magnetic studies of single-domain nickel cylinders (1996)
O'Barr, R., Lederman, M., Schultz, S., Xu, Weihua, Scherer, A., Tonucci, R. J.
For a complete experimental and theoretical explanation of the magnetic processes in an interacting collection of submicron magnetic particles, a fundamental understanding of the magnetic properties...
Fabrication of ultrasmall magnets by electroplating (1995)
Xu, W., Wong, J., Cheng, C. C., Johnson, R., Scherer, A.
We use high voltage electron beam lithography followed by electroplating to define small metal features on semiconductor substrates. These have been used to form high resolution etch masks, dense...
Fabrication of photonic band-gap crystals (1995)
We describe the fabrication of three-dimensional photonic crystals using a reproducible and reliable procedure consisting of electron beam lithography followed by a sequence of dry etching steps....
Uomi, K., Yoo, S. J. B., Scherer, A., Bhat, R., Andreadakis, N. C., Zah, C. E., ...
Room temperature, pulsed operation of 1.5 μm vertical-cavity surface-emitting laser is demonstrated by the optimization of an InGaAs/InGaAsP multi-quantum well active layer, especially the number of...
30% external quantum efficiency from surface textured, thin-film light-emitting diodes (1993)
Schnitzer, I., Yablonovitch, E., Caneau, C., Gmitter, T. J., Scherer, A.
There is a significant gap between the internal efficiency of light-emitting diodes (LEDs) and their external efficiency. The reason for this shortfall is the narrow escape cone for light in high...
Monolithic arrays of surface emitting laser NOR logic devices (1993)
Lee, Y. H., Yoo, J. Y., Shin, J. H., Scherer, A., Leibenguth, R. E.
Monolithic, cascadable, laser-logic-device arrays have been realized and characterized. The monolithic surface-emitting laser logic (SELL) device consists of an AlGaAs superlattice lasing around 780...
The extraordinary Hall effect in coherent epitaxial tau (Mn,Ni)Al thin films on GaAs (1993)
Sands, T., De Boeck, J., Harbison, J. P., Scherer, A., Gilchrist, H. L., Cheeks, T. L., ...
Ultrathin coherent epitaxial films of ferromagnetic tau(Mn,Ni)0.60Al0.40 have been grown by molecular beam epitaxy on GaAs substrates. X-ray scattering and cross-sectional transmission electron...
Epitaxial-tau(Mn,Ni)Al/(Al,Ga)As heterostructures: Magnetic and magneto-optic properties (1993)
Cheeks, T. L., De Boeck, Jo, Harbison, J. P., Sands, T., Tanaka, M., ...
Ferromagnetic Perpendicularly magnetized epitaxial thin films of tau (Mn,Ni)AI have been successfully grown on AlAs/GaAs heterostructures by molecular beam epitaxy. We have investigated the polar...
Poguntke, K. R., Soole, J. B. D., Scherer, A., LeBlanc, H. P., Caneau, C., Bhat, R., ...
Simultaneous multiple-wavelength operation of a multistripe array grating integrated cavity laser is reported. We demonstrate simultaneous lasing from a single output port at 2, 3, and 4 discrete...
Soole, J. B., Scherer, A., Silberberg, Y., LeBlanc, H. P., Andreadakis, N. C., Caneau, C., ...
An integrated wavelength demultiplexer and PIN detector array is reported for high density WDM detection at 1.5 μm. Signals spaced at 1 nm over the 1.48-1.55 μm wavelength range are separated and...
De Boeck, J., Sands, T., Harbison, J. P., Scherer, A., Gilchrist, H., Cheeks, T. L., ...
Hall-effect structures with submicrometre linewidths (
Wavelength-selectable laser emission from a multistripe array grating integrated cavity laser (1992)
Soole, J. B. D., Poguntke, K. R., Scherer, A., LeBlanc, H. P., Chang-Hasnain, C., Hayes, J. R., ...
We report laser operation of a multistripe array grating integrated cavity (MAGIC) laser in which the wavelength of the emission from a single output stripe is chosen by selectively injection pumping...
Deri, R. J., Pennings, E. C. M., Scherer, A., Gozdz, A. S., Caneau, C., Andreadakis, N. C., ...
The authors have monolithically integrated an optical front-end on InP for balanced, polarization-diversity coherent lightwave reception which is only 1.3-mm long. Low on-chip insertion loss (
Soole, J. B. D., Poguntke, K., Scherer, A., LeBlanc, H. P., Chang-Hasnain, C., Hayes, J. R., ...
A novel semiconductor laser formed by monolithically integrating an array of active stripes with a passive planar waveguide bearing an etched-in diffraction grating is reported. Laser emission occurs...
Soole, J. B. D., Silberberg, Y., Scherer, A., LeBlanc, H. P., Andreadakis, N. C., Caneau, C., ...
We report a novel coupling geometry for integrated waveguide photodetectors−a hybrid vertical coupling/butt coupling scheme that allows the integration of fast, efficient, photodetectors with...
Formation of Low Threshold Voltage Microlasers (1992)
Scherer, A., Jewell, J. L., Walther, M., Harbison, J. P., Florez, L. T.
Vertical cavity surface emitting lasers (VCSELs) with threshold voltages of 1.7V have been fabricated. The resistance-area product in these new vertical cavity lasers is comparable to that of...
1.57 μm InGaAsP/InP surface emitting lasers by angled focus ion beam etching (1992)
Lee, H. P., Scherer, A., Beebe, E. D., Hong, W. P., Bhat, R., Koza, M. A.
The characteristics of 1.57 μm InGaAsP/InP surface emitting lasers based on an in-plan ridged structure and 45° beam deflectors defined by angled focused ion beam (FIB) etching are reported. With...
Lasing in Sub-Micron Wide Vertical Cavity Microlasers by Picosecond Optical Pumping, (1992)
Jewell, J. L., Scherer, A., McCall, S. L., Harbison, J. P.
Microcavity lasers potentially will have ultra-low thresholds in the uA range or even lower. We have begun to investigate lasing in GaAs/AlAs microresonators as small as -0.4 um wide (less than halt...