Prof. Cheng Zhang
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Academic Career Length
28Years (1999-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 November 2002 in Journal of Lightwave Technology
Journal Article
Micro-ring wavelength filters and resonant modulators using polymer materials at 1300 nm and 1550 nm are analyzed, designed, and demonstrated. The rings are integrated with vertically coupled input and output waveguides. The devices are fabricated using optical lithography. Filters with a finesse of 141 and free spectral range of 5 nm at 1300 nm and finesse of 117 with a free spectral range (FSR) of 8 nm at 1550 nm are demonstrated. Ring resonators with a Q as high as 1.3 /spl times/ 10/sup 5/ at 1300 nm are demonstrated. The filters can be temperature tuned at the rate of 14 GHz//spl deg/C. Resonant ring modulators, which use an electrooptic polymer, are demonstrated. The resonance wavelength voltage tunes at the rate of 0.82 GHz/V. The modulators have a bandwidth larger than 2 GHz. Using the resonant modulator, and open eye diagram at 1 Gb/s is demonstrated.
10 August 2001 in Chemistry of Materials
Journal Article
Cheng ZhangLDLarry R. Dalton
Larry R. Dalton
MOMin-Cheol Oh
Min-Cheol Oh
HZHua Zhang
Hua Zhang
WSWilliam H. Steier
William H. Steier
1 May 2004 in The Journal of Physical Chemistry B
Journal Article
Yanyi HuangGPGeorge T. Paloczi
George T. Paloczi
AYAmnon Yariv
Amnon Yariv
Cheng ZhangLDLarry R. Dalton
Larry R. Dalton
22 January 2007 in Applied Physics Letters
Journal Article
SSSam-Shajing Sun
Sam-Shajing SunCheng ZhangALAbram Ledbetter
Abram Ledbetter
SCSoobum Choi
Soobum Choi
KSKang Seo
Kang Seo
NSNiyazi Serdar Sariciftci
Niyazi Serdar Sariciftci +2
The authors show that a photovoltaic device composed of a -donor-bridge–acceptor-bridge- type block copolymer thin film exhibits a significant performance improvement over its corresponding donor/acceptor blend (Voc increased from 0.14to1.10V and Jsc increased from 0.017 to 0.058mA∕cm2) under identical conditions, where donor is an alkyl derivatized poly-p-phenylenevinylene (PPV) conjugated block, acceptor is a sulfone-alkyl derivatized PPV conjugated block, and bridge is a nonconjugated and flexible unit. The authors attribute such improvement to the block copolymer intrinsic nanophase separation and molecular self-assembly that results in the reduction of the exciton and carrier losses.
1 July 1999 in Chemical Physics
Journal Article
WSWilliam H Steier
William H Steier
ACAntao Chen
Antao Chen
SLSang-Shin Lee
Sang-Shin Lee
SGSean Garner
Sean Garner
HZHua Zhang
Hua Zhang
BTBoris Tsap
Boris Tsap
+11
1 June 2006 in Macromolecules
Journal Article
Cheng ZhangSCSoobum Choi
Soobum Choi
JHJames Haliburton
James Haliburton
TCTaina Cleveland
Taina Cleveland
RLRui Li
Rui Li
CBCarl E. Bonner
Carl E. Bonner +2
About Me
Cheng Zhang is an associate professor of Chemistry at South Dakota State University (Brookings, SD, USA). He received his Ph.D. degree in chemistry from University of Southern California, Los Angeles, California, and his B.S. degree in physical chemistry from Wuhan University, China. His current research interests include biomass conversion into liquid fuels, chemicals and materials. The research aims to develop enabling technologies for the creation of the future thermochemical biorefineary: a self-sufficient hydrothermal liquefaction process that does not rely on petroleum-derived solvents for its continuous operation, a non-reductive catalytic process for biocrude deoxygenation, and chemical modification of biocrude for various applications including asphalt binder, adhesive, controlled release fertilizer, lifetime extension of natural fiber products, etc. He has published ~98 peer reviewed journal papers and patents.