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| 1 | Direct observation of localized surface plasmon field enhancement by Kelvin probe force microscopy显示文摘A surface plasmon(SP)is a fundamental excitation state that exists in metal nanostructures.Over the past several years,the performance of optoelectronic devices has been improved greatly via the SP enhancement effect.In our previous work,the responsivity of GaN ultraviolet detectors was increased by over 30 times when using Ag nanoparticles.However,the physics of the SP enhancement effect has not been established definitely because of the lack of experimental evidence.To reveal the physical origin of this enhancement,Kelvin probe force microscopy(KPFM)was used to observe the SP-induced surface potential reduction in the vicinity of Ag nanoparticles on a GaN epilayer.Under ultraviolet illumination,the localized field enhancement induced by the SP forces the photogenerated electrons to drift close to the Ag nanoparticles,leading to a reduction of the surface potential around the Ag nanoparticles on the GaN epilayer.For an isolated Ag nanoparticle with a diameter of~200 nm,the distribution of the SP localized field is located within 60 nm of the boundary of the Ag nanoparticle.For a dimer of Ag nanoparticles,the localized field enhancement between the nanoparticles was the strongest.The results presented here provide direct experimental proof of the localized field enhancement.These results not only explain the high performance of GaN detectors observed with the use of Ag nanoparticles but also reveal the physical mechanism of SP enhancement in optoelectronic devices,which will help us further understand and improve the performance of SP-based optoelectronic devices in the future. | Da-Bing Li Xiao-Juan Sun Yu-Ping Jia Mark I Stockman Hari P Paudel Hang Song Hong Jiang Zhi-Ming Li | 2017 | Light(Science & Applications)2017，6，1： | 2 |
| 2 | Characterization of degradation products of amorphous and polymorphic forms of clopidogrel bisulphate under solid state stress conditions显示文摘 | Raijada D K Prasad B Paudel A Shah R P Singh S | 2010 | J Pharm Biomed Anal2010，52，： | 1 |
| 3 | Choledochoduo- denostomy in the management of dilated common bile duct due to eholedocholithiasis显示文摘 | Shrestha S Pradhan G B Paudel P | 2012 | Nepal Med Coil J2012，14，1： | 1 |
| 4 | Nanoparticle-enabled selective electrodeposition 显示文摘 | Feng H P Paudel T Yu B | 2011 | Adv Mater2011，23，21： | 1 |
| 5 | Impact of nostalgia and past experience on recreational demand for wilderness显示文摘 | ACHARYA N PAUDEL K P HATCH L U | | 0，，05： | 1 |
| 6 | An empirical test of environmental Kuznets curve for water pollution 显示文摘 | Paudel K P Zapata H Susanto D | 2005 | Environmental and Resource Economics2005，31，3： | 1 |
| 7 | Effect of risk perspective on fertilizer choice by sharecroppers显示文摘 | Paudel K P Lohr L Martin N R | 2000 | Agricultural Systems2000，66，2： | 1 |
| 8 | Monitoring snow cover variability in an agropastoral area in the Trans Himalayan region of Nepal using MODIS data with improved cloud removal methodology显示文摘 | Paudel K P Andersen P | 2011 | Re- mote Sensing of Environment2011，115，5： | 1 |
| 9 | Monitoring Snow Cover Variability in an Agropastoral Area in the Trans Himalayan Region of Nepal Using MODIS Data with Improved Cloud Removal Methodology显示文摘 | Paudel K P Anderson P | 2011 | Remote Sensing of Environment2011，115，12： | 1 |
| 10 | Extended abstracts the 19th Himalaya-Karakoram-Tibet Workshop显示文摘 | Arita A Gautam P Paudel L P | 2004 | Himalayan Journal of Sciences2004，2，4： | 1 |
| 11 | Examining the CRB index as a leading indicator for US inflation 显示文摘 | Acharya R N Gentle P F Paudel K P | 2010 | Applied Economics Letters2010，17，15： | 1 |
| 12 | An Empirical Test of Environmen- tal Kuznets Curve for Water Po|lution显示文摘 | Paudel K P Zapata H Susanto D | 2005 | Environmental and Resource Economics2005，31，3： | 1 |
| 13 | Awareness of periconceptional folic acid supplementation among Nepalese women of childbearing age: a cross-sectional study 显示文摘 | Paudel P Wing K Silpakar SK | 2012 | Prev Med2012，55，5： | 1 |
| 14 | Antibacterial and antifungal ac- tivity of heartwood of Acacia catechu of Nepal显示文摘 | Joshi S Subedi Y P Paudel S K | 2011 | J Nepal Chem Soe2011，27，1： | 1 |
| 15 | Monitoring snow cover variability in an agropastoral area in the Trans Himalayan region of Nepal using MODIS data with improved cloud removal methodology显示文摘 | PAUDEL K P ANDERSEN P | 2011 | Remote Sensing of Environment2011，115，5： | 1 |
| 16 | Functional outcome in lumber discectomy open versus microendoscopic显示文摘 | RL P Chhabra H Paudel B | 2009 | PMJN2009，8，2： | 1 |
| 17 | Transdermal delivery of naltrexol and skin permeability lifetime after microneedle treatment in hairless guinea pigs显示文摘 | Banks S L Pinninti R R Gill H S Paudel K S Crooks P A Brogden N K | 2010 | J Pharm Sci2010，99，： | 1 |
| 18 | Choledochoduodenostomy in the management of dilated common bile duct due to choledocholithiasis 显示文摘 | Shrestha S Pradhan GB Paudel P | 2012 | Nepal Med CoU J2012，14，1： | 1 |
| 19 | 2012, Climatic Variability and Impacts on Biodiversity at Local Level: A case Study from Kanchanjanga Conservation Area, Nepal 显示文摘 | DEVKOTA B D PAUDEL P P BHUJU D R | 2012 | Journal of the faculty of agriculture kyushu university2012，57，2： | 1 |
| 20 | Ferroeleetric control of magnetocrystalline anisotropy at cobalt/poly( vi- nylidenefluoride) interfaces 显示文摘 | Lukashev P V Paudel T R Ix) J M | 2012 | ACS Nano2012，6，11： | 1 |
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