Lee, Wen Zhao and Ong, Duu Sheng and Choo, Kan Yeep and Yilmazoglu, Oktay and Hartnagel, Hans L. (2021) Monte Carlo evaluation of GaN THz Gunn diodes. Semiconductor Science and Technology, 36 (12). p. 125009. ISSN 0268-1242

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Ong, Duu Sheng and Preu, Sascha and Kuppers, Franko and Hartnagel, Hans L. (2017) Resonant Tunneling and Quantum Cascading for Optimum Room-Temperature Generation of THz Signals. IEEE Transactions on Electron Devices, 64 (8). pp. 3482-3488. ISSN 0018-9383

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Al-Daffaie, Shihab and Oprea, Ion and Ong, Duu Sheng and Kuppers, Franko and Hartnagel, Hans L. (2017) Resonant tunneling transport in ZnxBe1-xSe/ZnSe/ZnyBe1-ySe asymmetric quantum structures. Proceedings of SPIE - The International Society for Optical Engineering, 10248. p. 1024811. ISSN 1996-756X, 0277-786X

Schildbach, Christian and Ong, Duu Sheng and Hartnagel, Hans L. and Schmidt, Lorenz Peter (2016) Estimation of frequency conversion efficiency of THz devices using a ballistic electron wave swing circuit model. Semiconductor Science and Technology, 31 (6). 065003. ISSN 0268-1242

Ong, Duu Sheng and Hartnagel, Hans L. (2015) THz radiation by quasi-ballistic electron reflection in AlSb/InAs/AlSb heterostructures. EPL (Europhysics Letters), 109 (3). ISSN 1286-4854

Ong, Duu Sheng and Hartnagel, Hans L. (2007) Novel concept for THz signals generation in heterostructures. physica status solidi (RRL) – Rapid Research Letters, 1 (4). 150-152 . ISSN 18626254