Silicon nanomembrane-based near infrared phototransistor with positive and negative photodetections.

Nanoscale

Department of Materials Science, State Key Laboratory of ASIC and Systems, Fudan University, Shanghai 200433, People's Republic of China.

Published: September 2019

Surface plasmon polariton induces hot carrier injection that enables near infrared photodetection in Si nanomembranes and is of great significance for Si photonics integrated circuits. In this study, near infrared photodiode and phototransistor based on Si nanomembranes are designed and demonstrated, where the channel carrier concentration can be tuned through a gate modulation to implement both positive and negative photodetections. Through patterning a nanogroove array, Si nanomembrane-based photodetector exhibits high performance in near infrared range with an Ion/Ioff ratio of 102, and a responsivity of 7 mA W-1, under 1550 nm laser irradiation. Moreover, the photodetection ability, determined by Ioff/Ion can be further enhanced to ∼6 × 102 when the photodetector is modulated to work at the negative photodetection mode. Our study may provide a practical approach with fundamental guidelines and designs for fabricating high-performance Si-based infrared photodetection, which promotes the development of Si photonics.

Download full-text PDF

Source
http://dx.doi.org/10.1039/c9nr05189aDOI Listing

Publication Analysis

Top Keywords

positive negative
8
negative photodetections
8
infrared photodetection
8
infrared
5
silicon nanomembrane-based
4
nanomembrane-based infrared
4
infrared phototransistor
4
phototransistor positive
4
photodetections surface
4
surface plasmon
4

Similar Publications

The purpose of this study was to evaluate the psychometric properties of the Chinese version of the Revised Indebtedness Scale (IS-R-C) in mainland China. A total of 1057 university students participated in this study using a two-wave whole-group sampling method. Sample 1, consisting of 537 participants, was used for item analysis and exploratory factor analysis (EFA) of the Revised Indebtedness Scale (IS-R).

View Article and Find Full Text PDF

Bermuda grass (Cynodon dactylon) is a tropical grass found in all tropical and subtropical areas. It is widely found in Bangladesh and well known for its antimicrobial properties. Cotton gauze is a woven cloth which is used for wound dressing and wound cushioning.

View Article and Find Full Text PDF

While bacille-calmette-guerin (BCG) vaccination is one of the recommended strategies for preventing tuberculosis (TB), its coverage is low in several countries, including Ethiopia. This study investigated the spatial co-distribution and drivers of TB prevalence and low BCG coverage in Ethiopia. This ecological study was conducted using data from a national TB prevalence survey and the Ethiopian demographic and health survey (EDHS) to map the spatial co-distribution of BCG vaccination coverage and TB prevalence.

View Article and Find Full Text PDF

The position of the mental foramen is reported to change with age. This study aimed to examine age-related changes in the position of the mental foramen in men and women. Among 200 cases (age 21-100 years; 400 foramina) that underwent postmortem computed tomography, 109 (age 21-93 years; 218 foramina) with mandibular first and second premolars were examined using image analysis software to classify the position of the mental foramen according to Fishel's classification, and the χ² test was performed.

View Article and Find Full Text PDF

Effect of heart rate on B-type natriuretic peptide in sinus rhythm.

Sci Rep

December 2024

Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-shimbashi, Minato-ku, Tokyo, 105-8461, Japan.

B-type natriuretic peptide (BNP) levels accurately reflect the degree of cardiac overload in heart failure. Considering cardiac morphology and intracardiac pressure, including the left ventricular end-systolic volume index (LVESVI) and left ventricular end-diastolic volume index (LVEDVI), is essential for cardiac overload assessment. These indexes influence plasma BNP levels, and high heart rate is likely associated with cardiac morphology.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!