scholarly journals Hetero-structure mode space method for efficient device simulations

2021 ◽  
Vol 130 (10) ◽  
pp. 104303
Author(s):  
Mincheol Shin
Keyword(s):  
Hetero Structure ◽  
Mode Space ◽  
Space Method

Study of Reconfigurable Properties of DG-CNTFET with Different Oxide Material in Nanoscale Regime

2018 ◽  
Vol 24 (8) ◽  
pp. 5964-5969
Author(s):  
Singh Rohitkumar Shailendra ◽  
V. N Ramakrishnan
Keyword(s):  
Dielectric Constant ◽  
Gate Voltage ◽  
Drain Current ◽  
Length Scale ◽  
Oxide Material ◽  
Technology Roadmap ◽  
Mode Space ◽  
High Dielectric ◽  
Non Equilibrium Green’S Function ◽  
Space Method

As the scaling of Si MOSFET is approaching its limits, new alternative devices are coming up to overcome these limitations. CNTFET becomes one of the most promising candidates for Si MOS technology and its stunning performance opens a door of new possibilities in the field of nano-electronics. Towards or beyond the end of international technology roadmap for semiconductor (ITRS) 2009, when MOS scaling will likely become ineffective and/or prohibitively costly, some version(s) of emerging devices will be needed if the industry has to continue to enjoy rapid improvements in performance, lower power dissipation, cost per function, and higher functional density. In this paper, we have studied the effect of different oxide material and its thickness on the reconfigurable properties of DG-CNTFET up to 5 nm length scale. We used Non Equilibrium Green’s Function Method (NEGF) and mode space method to simulate our device to study the effect of different oxide material at smaller length scale. For dielectric constant (K) = 11 and 16 the drain current starts saturating with gate voltage = 0.25 V. Whereas dielectric constant (K) = 25, the drain current starts saturating with gate voltage = 0.20 V. Hence our simulation study shows that high dielectric constant material is better for CNTFET based device at few nanometer scale.

Productive pleasures across binary regimes: Phenomenologies of bisexual desires among Latino men

Sexualities ◽  
2019 ◽  
Vol 23 (4) ◽  
pp. 645-665 ◽  
Author(s):  
Jorge Fontdevila
Keyword(s):  
Impression Management ◽  
Qualitative Interviews ◽  
Status Quo ◽  
Sexual Agency ◽  
Latino Men ◽  
Hetero Structure ◽  
Men And Women ◽  
Liminal Spaces ◽  
Sexual Ambiguity ◽  
Sex With Men

Modern orders were founded on the repudiation of sexual ambiguity and the confinement of desire within discursive classifications of man/woman and hetero/homosexual binaries. However, the persistence of bisexual practices reveals the unstable nature of these modern binary regimes, which require the “erasure” of bisexuality to perpetuate their status quo. Yet some men negotiate their bisexual desires in productive ways without undermining their sense of masculinity and sexual agency. Based on qualitative interviews I explore the sexualities of a group of these men—Latino men who have sex with men and women in southern California. I find that sex with women involves interactional work that is more demanding on impression management and moral grounds. Sex with men is rougher, adventurous, and less restrained. I conclude that sex with men opens liminal spaces that resist binary definition and are less discursively regulated—relative “anti-structures” à la Victor Turner that decouple agency from (hetero)structure. This transgressive liminality is key to understanding these same-sex spaces' recurrent attraction and productive pleasure. The study challenges monolithic understandings of migrant sexualities by finding great diversity among non-gay identified men, including homoerotic practices combined with strong desire for women.

scholarly journals Deep-learning-based high-resolution recognition of fractional-spatial-mode-encoded data for free-space optical communications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Youngbin Na ◽  
Do-Kyeong Ko
Keyword(s):  
Deep Learning ◽  
Communication Systems ◽  
Degrees Of Freedom ◽  
Image Transmission ◽  
Data Traffic ◽  
Free Space Optical ◽  
Learning Classifier ◽  
Communication Capacity ◽  
Data Rates ◽  
Mode Space

AbstractStructured light with spatial degrees of freedom (DoF) is considered a potential solution to address the unprecedented demand for data traffic, but there is a limit to effectively improving the communication capacity by its integer quantization. We propose a data transmission system using fractional mode encoding and deep-learning decoding. Spatial modes of Bessel-Gaussian beams separated by fractional intervals are employed to represent 8-bit symbols. Data encoded by switching phase holograms is efficiently decoded by a deep-learning classifier that only requires the intensity profile of transmitted modes. Our results show that the trained model can simultaneously recognize two independent DoF without any mode sorter and precisely detect small differences between fractional modes. Moreover, the proposed scheme successfully achieves image transmission despite its densely packed mode space. This research will present a new approach to realizing higher data rates for advanced optical communication systems.

scholarly journals Spin-decoupled metasurface for simultaneous detection of spin and orbital angular momenta via momentum transformation

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Yinghui Guo ◽  
Shicong Zhang ◽  
Mingbo Pu ◽  
Qiong He ◽  
Jinjin Jin ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Simultaneous Detection ◽  
Single Element ◽  
Single Shot ◽  
Single Spin ◽  
Dual Functional ◽  
Angular Momenta ◽  
Quadratic Phase ◽  
Mode Space ◽  
Optical Configuration

AbstractWith inherent orthogonality, both the spin angular momentum (SAM) and orbital angular momentum (OAM) of photons have been utilized to expand the dimensions of quantum information, optical communications, and information processing, wherein simultaneous detection of SAMs and OAMs with a single element and a single-shot measurement is highly anticipated. Here, a single azimuthal-quadratic phase metasurface-based photonic momentum transformation (PMT) is illustrated and utilized for vortex recognition. Since different vortices are converted into focusing patterns with distinct azimuthal coordinates on a transverse plane through PMT, OAMs within a large mode space can be determined through a single-shot measurement. Moreover, spin-controlled dual-functional PMTs are proposed for simultaneous SAM and OAM sorting, which is implemented by a single spin-decoupled metasurface that merges both the geometric phase and dynamic phase. Interestingly, our proposed method can detect vectorial vortices with both phase and polarization singularities, as well as superimposed vortices with a certain interval step. Experimental results obtained at several wavelengths in the visible band exhibit good agreement with the numerical modeling. With the merits of ultracompact device size, simple optical configuration, and prominent vortex recognition ability, our approach may underpin the development of integrated and high-dimensional optical and quantum systems.

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