Giant Gating Tunability of Optical Refractive Index in Transition Metal Dichalcogenide Monolayers

Nano Letters
Yiling YuLinyou Cao

Abstract

We report that the refractive index of transition metal dichacolgenide (TMDC) monolayers, such as MoS2, WS2, and WSe2, can be substantially tuned by >60% in the imaginary part and >20% in the real part around exciton resonances using complementary metal-oxide-semiconductor (CMOS) compatible electrical gating. This giant tunablility is rooted in the dominance of excitonic effects in the refractive index of the monolayers and the strong susceptibility of the excitons to the influence of injected charge carriers. The tunability mainly results from the effects of injected charge carriers to broaden the spectral width of excitonic interband transitions and to facilitate the interconversion of neutral and charged excitons. The other effects of the injected charge carriers, such as renormalizing bandgap and changing exciton binding energy, only play negligible roles. We also demonstrate that the atomically thin monolayers, when combined with photonic structures, can enable the efficiencies of optical absorption (reflection) tuned from 40% (60%) to 80% (20%) due to the giant tunability of the refractive index. This work may pave the way toward the development of field-effect photonics in which the optical functionality can be controlle...Continue Reading

References

Jan 1, 1988·British Journal of Rheumatology·D T Yu
Apr 1, 1972·Archives of Neurology·G F Wooten, D J Reis
Aug 15, 1995·Physical Review. B, Condensed Matter·P LefebvreS Glutsch
Oct 15, 1996·Physical Review. B, Condensed Matter·A ManassenL N Pfeiffer
Nov 27, 1995·Physical Review Letters·C Tanguy
May 20, 2005·Nature·Qianfan XuMichal Lipson
Jan 22, 2007·Optics Express·Ansheng LiuMario Paniccia
May 10, 2011·Nature·Ming LiuXiang Zhang
Sep 6, 2011·Nature Nanotechnology·Long JuFeng Wang
Dec 4, 2012·Nature Materials·Kin Fai MakJie Shan
Feb 14, 2013·Nature Communications·Jason S RossXiaodong Xu
Jul 30, 2014·ACS Nano·Dmitry OvchinnikovAndras Kis
Aug 30, 2014·Physical Review Letters·Alexey ChernikovTony F Heinz
Sep 17, 2014·Natural Product Reports·Tim WezemanKye-Simeon Masters
Feb 12, 2015·Nano Letters·Vrinda TharejaMark L Brongersma
Mar 19, 2015·Scientific Reports·Bairen ZhuXiaodong Cui
Apr 22, 2015·Nature Communications·Eun Jung LeeDong-Il Yeom
Oct 3, 2015·Physical Review Letters·Alexey ChernikovTony F Heinz
Nov 26, 2015·Scientific Reports·Yiling YuLinyou Cao
Feb 5, 2016·Nano Letters·J KleinJ J Finley
Aug 3, 2016·ACS Nano·Lujun HuangLinyou Cao

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Citations

Jul 20, 2018·Chemical Society Reviews·Victor W BrarDeep Jariwala
Mar 4, 2018·Nature Communications·Alberto CiarrocchiAndras Kis
May 10, 2019·Advanced Materials·Madeline S StarkScott C Warren
Feb 12, 2020·Physical Chemistry Chemical Physics : PCCP·Zhao HuMinoru Osada
Jun 30, 2018·Nature Communications·Myungsoo KimDeji Akinwande
May 29, 2020·ACS Nano·Megan E Beck, Mark C Hersam
Aug 31, 2018·Nano Letters·Biswanath ChakrabortyVinod M Menon
Jul 1, 2020·The Journal of Physical Chemistry. B·Lianjun ZhengDavid N Beratan
Sep 2, 2021·Nano Letters·Melissa LiHarry A Atwater
Nov 13, 2021·The Journal of Physical Chemistry Letters·Lifeng WangKaifeng Wu
Dec 30, 2021·Nano Letters·Ivo TanghePieter Geiregat
May 8, 2019··Sang Hoon ChaeGaurang R. Bhatt

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