Abstract-Engineering Photophenomena in Large, 3D Structures Composed of Self-Assembled van der Waals Heterostructure Flakes

1. M. Bala Murali Krishna¹, 
2. Michael K. L. Man¹, 
3. Soumya Vinod², 
4. Catherine Chin¹,
5. Takaaki Harada¹, 
6. Jaime Taha-Tijerina²,
7. Chandra Sekhar Tiwary³, 
8. Patrick Nguyen²,
9. Patricia Chang⁴, 
10. Tharangattu N. Narayanan⁵, 
11. Angel Rubio^6,7, 
12. Pulickel M. Ajayan², 
13. Saikat Talapatra^8,9 and
14. Keshav M. Dani^1,*

Article first published online: 17 AUG 2015

DOI: 10.1002/adom.201500296

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA

http://onlinelibrary.wiley.com/doi/10.1002/adom.201500296/abstract

A photocapacitive, dissipationless, optoelectronic terahertz response is observed in robust 3D van der Waals heterostructured flakes of hexagonal boron nitride and graphene. The response is fundamentally distinct from that of the parent materials and can be tuned from insulating to photocapacitive to semiconducting by varying the composition. Such hybrid structures have broad implications for tunable optoelectronic materials and potential terahertz devices.