Administrative Staff Authors (Scholarly Publications): Recent submissions
Now showing items 681-700 of 828
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An experimental and theoretical analysis of jitter in self-pulsating lasers synchronized to periodic electrical signals
(1996)We investigate both experimentally and theoretically the behavior of pulse jitter in compact disk (CD) self-pulsating lasers that have been synchronized to an applied periodic electrical signal. Our investigations reveal ... -
Bistable self-electro-optic operation of strained In0.1Ga0.9As/GaAs asymmetric Fabry Perot modulators
(1991)We report bistable operation of a strained-layer InGaAs/GaAs asymmetric Fabry-Perot optical modulator configured as a self-electro-optic effect device (SEED) operating in reflection mode. Bistable loops are observed from ... -
Effect of temperature on self-pulsation in narrow stripe, gain-guided, compact disk laser diodes
(IEEE, 1998)There is an ongoing strong interest in the development of red self-pulsating lasers for data storage compact disk (CD) applications.? Of particular importance in this mass-market application is that the laser diode ... -
All optical, high contrast absorptive modulation in an asymmetric Fabry-Perot etalon
(American Institute of Physics, 1991)We report a 27:l switching contrast ratio with 2.5 mW of power in an asymmetric Fabry- Perot Ctalon. The modulation is achieved by optical saturation of the excitonic absorption profile of a 95 A GaAs/AlGaAs multiple ... -
Demonstration of high-brightness-mode propagation in a compound waveguide structure
(American Institute of Physics, 1999)We demonstrate the existence of an unusual and useful high-brightness guided mode of a multimode AlGaAs/GaAs heterostructure compound slab waveguide. This mode has a narrow near-field single lobe confined to the low-index ... -
Excitation-induced coherence in a semiconductor microcavity
(American Physical Society, 2002)We measure the dephasing times of high finesse semiconductor microcavities in the strong coupling regime using degenerate four-wave mixing. We find that under certain excitation conditions (near-normal incidence) the ... -
Optical measurement of ion implantation damage depth in multiple-quantum-well mesa structures
(1991)We have determined the depth of ion implant damage in semiconductor materials by nonlinear optical measurements. The carrier lifetime in ion-implanted mesas was measured by the pump-probe technique, and the carrier ... -
Frequency locking and quasiperiodicity in a modulated external cavity injection laser
(American Institute of Physics, 1989)We report the observation of frequency locking and quasiperiodicity in a modulated external cavity injection laser. The order of appearance of the frequency-locked regions follows a Farey sequence as the modulation frequency ... -
Exciton line broadening in CdxZn1?xTe/ZnTe multiple quantum wells
(American Institute of Physics, 1988)We have investigated Cdx Zn1?xTe/ZnTe multiple quantum wells using absorption techniques. We have observed sharp excitonic features at low temperatures which strongly broaden at room temperature. The strength of the ... -
Effect of dispersion on the reflectivity of an asymmetric Fabry?Perot etalon
(American Institute of Physics, 1995)We have shown that the spectral properties of an asymmetric Fabry?Perot etalon, with a multiple quantum well cavity, are very sensitive to dispersion in the refractive index. We also show that this effect can be used to ... -
Observation of optical Stark effect in InGaAs/InP multiple quantum wells
(American Institute of Physcis, 1987)We report an experimental observation of a blue shift in the n=1 heavy-hole exciton line of In0.53Ga0.47As/InP multiple quantum wells resulting from a picosecond photoexcitation in the transparent spectral region. The ... -
Trial and Error in Thomas Hardy's Legal Fictions
(The Thomas Hardy Soceity, 2008)Thomas Hardy held the role of Justice of the Peace, or borough magistrate from 1884 to 1912. In an interview with The World in 1886 he stated that `he played the part of Justice Silence with great assiduity, though admitting ... -
Putting Research Evidence to Work: Key Issues for Research Utilisation in Irish Children's Services
(Children Acts Advisory Board, 2009)Following its establishment in July 2007 the Board of the CAAB identified as a key strategic objective the need to strengthen the knowledge base of children?s services. In order to fully meet this objective the Board ... -
The Role and Future Development of Meals-on-Wheels Services for Older People in Ireland
(National Council on Ageing and Older People, 2008)In recent years, the National Council on Ageing and Older People (NCAOP) has noted the increased recognition of the importance of the meals-on-wheels services in improving older people?s nutritional status, health and ... -
Lessons from a Community-Based Participatory Research Project: Older People's and Researchers' Reflections
(2010)The ethical and practical importance of actively involving older people in the research process is increasingly articulated in the gerontology literature. This article contributes to the literature by outlining a ... -
From the workhouse to the home. The historical origins and development of domiciliary care services for older people in Ireland
(2008)Purpose: Care of older persons in their own homes has in recent years received much attention in Ireland. The proponents of domiciliary care draw on both economic and quality of life arguments, many of which are identifiable ... -
In Search of Security: Migrant Workers' Understandings, Experiences and Expectations Regarding 'Social Protection'
(2009)While both migration and welfare states are popular topics of research, the intersection between them is rarely studied. In this article, we present the findings of a study that explored migrant workers? conceptualisation ... -
Obligations, Ambitions, Calculations: Migrant Care Workers' Negotiation of Work, Career and Family
(2010)The literature on migrant care workers has tended to place little emphasis on themultiple relationships thatmigrant carers formwith care recipients, employers/managers and work colleagues. This article makes a contribution ... -
The Different Faces of Care Work: Understanding the Experiences of the Multi-Cultural Care Workforce
(2009)An increased demand for long-term care services coupled with the decreased availability of informal (family) carers in many industrialised countries has led to the employment of growing numbers of `migrant care workers ... -
Rethinking the Value of Residents' Councils: Observations and Lessons from an Exploratory Study
(2010)Little empirical research is available on residents? councils in care settings for older people. This article analyzes the operation of a residents? council in an Irish facility, drawing on direct observation of council ...
