Search results for: C. Balocco

Items from 1 to 20 out of 20 results

chapter

Low-profile second-order terahertz bandpass frequency selective surface with sharp transitions

M. Hussein, J. Zhou, Y. Huang, J. Jin, more

2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) > 1 - 3

2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)

This paper proposes a new approach to implement Frequency Selective Surfaces (FSSs) with sharp transition edges and almost flat bandpass responses. The design is suitable for submillimetre wave and terahertz applications. The proposed structure exhibits a low insertion loss in the desired band. The structure is realized by combining bandstop and bandpass FSS structures on the same plane. By cascading...

article

Angular and positional dependence of Purcell effect for layered metal-dielectric structures

A. R. Gubaydullin, V. A. Mazlin, K. A. Ivanov, M. A. Kaliteevski, more

Applied Physics A > 2016 > 122 > 4 > 1-5

We study the angular dependence of the spontaneous emission enhancement of a dipole source inserted into a layered metal-dielectric metamaterial. We analyse the dependence of Purcell effect from the position of the dipole in the layered hyperbolic media. We analyse the impact of the complex structure of eigenmodes of the system operating in hyperbolic regime. We have shown that the spontaneous emission...

article

A multidisciplinary approach to the study of cultural heritage environments: Experience at the Palatina Library in Parma

C. Pasquarella, C. Balocco, G. Pasquariello, G. Petrone, more

Science of The Total Environment > 2015 > 536 > C > 557-567

The aim of this paper is to describe a multidisciplinary approach including biological and particle monitoring, and microclimate analysis associated with the application of the Computational Fluid Dynamic (CFD). This approach was applied at the Palatina historical library in Parma. Monitoring was performed both in July and in December, in the absence of visitors and operators. Air microbial monitoring...

chapter

Free standing metal aperture array acting as a variable bandpass filter in the THz region

C.A.K. Hill, C. Balocco, D. Wood, A.J. Gallant

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC) > 1

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC)

This work reports on the extraordinary THz transmission properties of shape optimized metallic subwavelength aperture arrays, and its dependence upon incident beam angle. The resonant frequency of the aperture array has been shown to vary between 0.82 – 0.97 THz due to incident angle alone, while maintaining excellent (>85%) peak transmission.

chapter

Design and performance of a micro-rectenna focal plane array for thermal energy harvesting

C. Balocco, Y. Pan, M. C. Rosamond, E. H. Linfield

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC) > 1

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC)

In this paper, we present the design and experimental implementation of a thermal energy harvesting device. Each energy-harvesting unit cell functions as an individual micro-rectenna and, collectively, as a focal plane array (FPA). The FPA is fabricated out of a two-dimensional electron gas (2DEG) in GaAs/AlGaAs quantum well using electron beam lithography (EBL) and photolithography methods, and consists...

chapter

Novel unipolar nanodiodes for room-temperature THz detection

C. Balocco, S. R. Kasjoo, X. F. Lu, L. Q. Zhang, more

2011 International Conference on Infrared, Millimeter, and Terahertz Waves > 1 - 2

2011 36th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2011)

We report on the room-temperature electrical rectification at 1.5 THz with novel non-linear asymmetric nanochannels. The planar layout facilitates the integration of microfabricated THz antennas without introducing parasitic elements, and enables ultra-high operation frequencies. This is the highest speed reported for nanorectifiers to date.

chapter

Fabrication of novel unipolar nanodiodes in InAs/AlSb for microwave detection

L. Q. Zhang, Y. Alimi, C. Balocco, H. Zhao, more

2011 International Conference on Infrared, Millimeter, and Terahertz Waves > 1 - 2

2011 36th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2011)

We report on the fabrication of unipolar nanodiodes into an InAs/Al_xGa_1−xSb quantum-well heterostructure for room temperature microwave detection up to 110 GHz. Electron-beam lithography was combined with both dry- and wet-etching, and we explored the differences in the electric and detection parameters with the two methods.

chapter

Novel Terahertz nanodevices and circuits

C Balocco, S R Kasjoo, Xiaofeng Lu, Linqing Zhang, more

2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology > 1176 - 1179

2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology (ICSICT)

Terahertz (THz) technology has attracted rapidly increasing attention due to a very broad range of potential applications, e.g., medical imaging and homeland security. Perhaps more importantly, developing electronic devices capable of operating at THz frequencies will have great impact on future generation computation and communication. Despite enormous effort in recent years, THz field is still largely...

article

Fast polymer nanorectifiers for inductively coupled RFID tags

L.A. Majewski, C. Balocco, R. King, S. Whitelegg, more

Materials Science & Engineering B > 2008 > 147 > 2-3 > 289-292

In this article, an alternative approach to high switching speed organic rectifiers based on a semiconducting polymer, poly(dialkylquarterthiophene) (PQT-12) is demonstrated. It is shown that by using a linear array of polymer nanowires with intentionally broken symmetry, nanodevices displaying diode-like I/V characteristics can be obtained. The so-called self-switching devices (SSDs) are single-layered...

article

Transient analysis of an external building cladding

C. Balocco, G. Grazzini, A. Cavalera

Energy & Buildings > 2008 > 40 > 7 > 1273-1277

Energy performances and building quality can be achieved by high performance envelopes. In this paper the thermal and mechanical performances of external cladding, applied to a traditional wall, largely used in existing buildings, were investigated by a transient simulation. Result comparison with the thermal performances obtained by simulating the wall without the insulation system showed that external...

article

Non-destructive patterning of conducting-polymer devices using subtractive photolithography

C. Balocco, L.A. Majewski, A.M. Song

Organic Electronics > 2006 > 7 > 6 > 500-507

We demonstrate a non-destructive, high-throughput, and high-resolution lithographic patterning method to fabricate organic-semiconductor devices based on UV lithography with the standard equipment of well-established silicon technology. The method is applied to fabricate poly(3-hexylthiophene) (P3HT)-based organic thin-film transistors (OTFTs) with high yield. Patterns with features down to 2μm are...

article

Sustainability and information in urban system analysis

C. Balocco, G. Grazzini

Energy Policy > 2006 > 34 > 17 > 2905-2914

In the present paper, a possible application of information theory for urban system analysis is shown. The ESM method proposed, based on Shannon's entropy analysis, is useful to evaluate different alternative measures of new energy saving technology transfer at different programming stages for consumption reduction and environmental impact control. A case study has been conducted in an urban area...

chapter

Detection Millimeter Waves Using Novel Electronic Nano-Devices

C. Balocco, M. Halsall, A.M. Song, Nguyen Quang Vinh

2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics > 353

2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics

THz spectrum lies between microwave and midinfrared, a region that remains largely unexplored mainly due to the bottleneck issue of lacking compact, room-temperature emitters and detectors. Here, we report on experiments using novel nanodevices as detectors at frequencies up to 2.5 THz, which are to our knowledge not only the simplest diodes but also the quickest electronic nanodevices reported so...

chapter

Novel Semiconductor Nanodevices for Detections of THz Signals

C. Balocco, A.M. Song

2006 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems > 1292 - 1296

2006 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems

By introducing a broken geometric symmetry in a semiconductor nanochannel, we have realized an array of planar nano-diodes, called a self-switching device (SSD), using only one nanolithography step. Not only being much simpler than conventional diodes which generally require a multi-layer architecture and multi-step lithography, the SSD also possesses a very high operational speed because of the simplicity...

article

Microwave Detection at 110 GHz by Nanowires with Broken Symmetry

C. Balocco, A. M. Song, M. Åberg, A. Forchel, more

Nano Letters > 2005 > 5 > 7 > 1423 - 1427

article

Using exergy to analyze the sustainability of an urban area

C Balocco, S Papeschi, G Grazzini, R Basosi

Ecological Economics > 2004 > 48 > 2 > 231-244

The extended exergy analysis method, taking into account the mean life time cycle of building, has been applied to evaluate the sustainability of an urban area. The impact of the emissions due to the life cycle of the buildings has been evaluated. Two thermodynamic indexes, η _I and η _II showing, respectively, the first and second law efficiency of buildings, have been proposed as thermodynamic...

article

Experimental results of transparent, reflective and absorbing properties of some building materials

C. Balocco, M.A. Forastiere, G. Grazzini, G.C. Righini

Energy & Buildings > 2001 > 33 > 6 > 563-568

This paper presents the study of the behaviour of some transparent materials, glass and plastic sheets and films, due to incidence light radiation. Transmission, reflection and absorbing coefficient variations are evaluated by experimental measurements for different incidence angles of light. To this aim two laser radiation sources have been used (a He-Ne 107S and a diode) characterised by a wavelength...

article

A statistical method to evaluate urban energy needs

C. Balocco, G. Grazzini

Fuel and Energy Abstracts > 1998 > 39 > 1 > 73

The statistical method proposed to evaluate urban energy needs, utilizes a numerical map to extend to the universe of the evaluation obtained from a probability stratified simple random sampling design with the optimum allocation of sample buildings to the strata. The strata considered refers to age of buildings. We checked two correlations over the real surveyed sample buildings and the numeric...

article

A statistical method to evaluate urban energy needs

C. Balocco, G. Grazzini

Fuel and Energy Abstracts > 1997 > 38 > 6 > 453

A numerical map is used in the proposed statistical method to evaluate urban energy needs. This map aims to extend to the universe of the evaluation obtained from a probability stratified simple random sampling design with the optimum allocation of sample buildings to the strata. The strata considered refers to age of buildings. We checked two correlations over the real surveyed sample buildings...

article

Measuring thermal properties with the parallel wire method: a comparison of mathematical models

G. Grazzini, C. Balocco, U. Lucia

International Journal of Heat and Mass Transfer > 1996 > 39 > 10 > 2009-2013

The accuracy of thermal conductivity and diffusivity measurements using the parallel wire method depends on the mathematical model used. This work presents an analytical solution of a model that takes into account the probe radius and the thermal contact resistance between the material and the probe. The model is compared to the classical hot wire model on the basis of the acquired experimental...

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