Simulation Simulation of mushroom-typed modified near-ballistic uni-traveling-carrier photodetector with sub-THz operational bandwidth

• Autorzy: Shen Yuansen , Niu Huijuan , Chen Qingtao , Wang Liwen , Liu Kai , Duan Xiaofeng , Huang Yongqing

Identyfikatory

DOI

10.37190/oa/200186

• Języki publikacji: EN

Abstrakty

EN

We report a novel mushroom-typed modified near-ballistic uni-traveling-carrier photodetector (modified NBUTC-PD) based on a drift-diffusion model which achieves high responsivity at the sub-THz regime. By well-designed active and depleted regions to form a “mushroom” type, with the optimal cliff and charge layers to make electrons transport at a “near-ballistic” speed, of order 107 cm/s, as well as the rational hybrid-doping absorber, the modified NBUTC-PD successfully achieves the decoupling between the bandwidth and responsivity characteristics. For the modified NBUTC-PD with an active area of 12.56 μm², the simulation shows that the 3-dB bandwidth is up to 107 GHz, with a responsivity up to 0.38 A/W, at a reverse bias voltage of 1 V. The decrease in 3-dB bandwidth of the modified NBUTC-PD is analysed in detail under high-light injection conditions, which results from the energy band shift and electric field collapse.

Słowa kluczowe

EN

uni-traveling-carrier photodetector; mushroom-typed photodetector; near-ballistic transport; high responsivity; high speed operation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2025
• Tom: Vol. 55, nr 1
• Strony: 33--48
• Opis fizyczny: Bibliogr. 59 poz., rys., tab.

Twórcy

autor

Shen Yuansen

• School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China Shandong Provincial Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng 252000, China
• State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

autor

Niu Huijuan

• School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China Shandong Provincial Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng 252000, China

autor

Chen Qingtao

• Department of Electrical Engineering, Poly-Grames Research Center, Polytechnique Montréal, Montréal H3T 1J4, Canada

autor

Wang Liwen

• School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China Shandong Provincial Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng 252000, China
• State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

autor

Liu Kai

• State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

autor

Duan Xiaofeng

• State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

autor

Huang Yongqing

• State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

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