Han Zhang

Shenzhen University

Han Zhang

Black phosphorus based ultrafast optical modulation and Bio-photonics applications

 

Han Zhang and Dianyuan Fan

Shenzhen Engineering Laboratory of Black phosphorus and Optoelectronics, International Collaboration Laboratory for two-dimensional materials and optoelectronics (MOE), and Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University, Shenzhen 518060, China

hzhang@szu.edu.cn

 

Abstract

Black phosphorous (BP), the most thermodynamically stable allotrope of phosphorus, is a high-mobility layered semiconductor with direct band-gap determined by the number of layers from 0.3 eV (bulk) to 2.0 eV (single layer). Therefore, BP is considered as a natural candidate for broadband optical applications, particularly in the infrared (IR) and mid-IR part of the spectrum. The strong light-matter interaction, narrow direct band-gap, and wide range of tunable optical response make BP as a promising nonlinear optical material, particularly with great potentials for infrared and mid-infrared opto-electronics. We demonstrate all-optical-thresholding, optical modulation and four wave-mixing for optical communications by using phosphorene-decorated microfiber. Our findings, as the first prototypic device of all-optical-thresholding, optical modulation and all-optical signal processing might facilitate the development of phosphorene-based optical communication technologies. Furthermore, BP has higher surface area to volume ratio as compare to MoS2 and graphene since it has a puckered lattice formation, which can enhance the drug loading capacity. In addition to its fascinating electronic structure, BP nanosheet has been found to be highly efficient photosensitizer, and can ben employed as an agent of photodynamic treatment to produce radical oxygen. Moreover, BP nanoparticles and BP quantum dots display broad absorptions in the whole visible light region. This phenomenon shows that both BP nanoparticles and BP quantum dots have NIR photothermal properties which is use for photothermal treatment, these exceptional properties of BP make it as a new potential nanomaterial for photothermal treatment and drug delivery system of multimodal therapy for cancer. The potential applications of Black phosphorus based ultrafast optical modulation and Bio-photonics applications will be discussed in this talk.

 

Related work on Black phosphorus from our group:

1. Biodegradable black phosphorus-based nanospheres for in vivo photothermal cancer therapy. Nature communications, 2016, 12967

2. Black Phosphorus Nanosheets as a Robust Delivery Platform for Cancer Theranostics. Advanced Materials, 2016.

3. "Facile Synthesis of Black Phosphorus: an Efficient Electrocatalyst for the Oxygen Evolving Reaction." Angewandte Chemie 128.44 (2016): 14053-14057.

4. Broadband nonlinear optical response in multi-layer black phosphorus: an emerging infrared and mid-infrared optical material, Optics Express 23 (9), 11183-11194 (Citation: 150)

5. Mechanically exfoliated black phosphorus as a new saturable absorber for both Q-switching and Mode-locking laser operation, Optics Express 23 (10), 12823-12833(Citation: 120)

6. Solvothermal Synthesis and Ultrafast Photonics of Black Phosphorus Quantum Dots, Advanced Optical Materials, DOI: 10.1002/adom.201600214.

7. From Black Phosphorus to Phosphorene: Basic Solvent Exfoliation, Evolution of Raman Scattering, and Applications to Ultrafast Photonics, Advanced Functional Materials 25, 6996-7002 (Citation: 55)

8. Ultrasmall Black Phosphorus Quantum Dots: Synthesis and Use as Photothermal Agents, Angewandte Chemie 127 (39), 11688-11692 (Citation: 50)

9. Emerging Trends in Phosphorene Fabrication towards Next Generation Devices, Advanced Science, advs201600305(201600305) (Invited review)

10. TiL4Coordinated Black Phosphorus Quantum Dots as an Efficient Contrast Agent for In Vivo Photoacoustic Imaging of Cancer, Small, DOI: 10.1002/smll.201602896.

 

Biography

Han Zhang, Distinguished Professor of photonics, director of Shenzhen Engineering Laboratory of Black phosphorus and Optoelectronics, Shenzhen University, China. He was born in Hubei, China at 1984. He received the B.S. degree from Wuhan University and received the Ph.D. from Nanyang Technological University. He is the winner of National Thousand Talents Programfor Distinguished Young Scholars, a government endowed professorship, and National Science Fund for Excellent Young Scholars as well as the New Century Excellent Talent Award, MOE, China. His current research is on the ultrafast and nonlinear photonics of two dimensional materials. He has published more than 160 papers with total citations higher than 9600 times and H-index of 47 (according to google scholar). His website:

https://scholar.google.com/citations?user=lOhAdlAAAAAJ&hl=zh-CN

 

Professor Han ZHANG

Director of Shenzhen Engineering Laboratory of Black phosphorus and Optoelectronics

International Collaboration Laboratory for two-dimensional materials and optoelectronics (MOE), and Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University, Shenzhen 518060, China

E-mail : hzhang@szu.edu.cn

 

EDUCATIONAL BACKGROUND

2011          Ph. D. in microelectronics, Nanyang Technological University, Singapore

2006          Bachelor of Science Department of Physics, Wuhan University

WORK EXPERIENCE

2011. 9 2012.4    Postdoctoral research fellow, Service OPERA-photonique, Université libre de Bruxelles (U.L.B.).

2012. 4 2013.7    Senior Research fellow, graphene research center, National University of Singapore

2013. 7 present    Professor of Photonics, Shenzhen University

2016. 7 present    director of Shenzhen Engineering Laboratory of Black phosphorus and Optoelectronics, Shenzhen University

PRESENT RESEARCH ACTIVITY

Novel Properties of Graphene and 2 Dimensional Materials

Graphene and two-dimensional layered materials based photonics and Optoelectronics

Laser optics and nonlinear optics

 

Web: http://opto.szu.edu.cn/index.php?s=/Home/Article/detail/id/259.html

 

 

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