Abstract
The design of a continuously tunable optical delay line based on a compact graphene-based silicon Bragg grating is reported. High performance, in terms of electro-optical switching time (tswitch < 8 ns), delay range (Δτ = 200 ps), and figure of merit FOM = Δτ/A = 1.54x105 ps/mm2, has been achieved with an ultra-compact device footprint (A ~1.3 x 10-3 mm2), so improving the state-of-the-art of integrated optical delay lines. A continuous and complete tunability of the delay time can be achieved with a very low delay loss ( = 0.03 dB/ps) and a weak power consumption ( = 0.05 mW/ps). A flat bandwidth B = 1.19 GHz has been calculated by exploiting the slow-light effect in the device. This performance makes the proposed optical delay line suitable for several applications in Microwave Photonics (MWP), such as beamsteering/beamforming, for which large delay range, flat and wide bandwidth and small volume are required.
References
Feb 25, 2005·Nature·Joe T Mok, Benjamin J Eggleton
Mar 3, 2007·Nature Materials·A K Geim, K S Novoselov
Oct 17, 2008·Optics Letters·Andrea MelloniMario Martinelli
Apr 15, 2009·Optics Express·Emily F BurmeisterJohn E Bowers
Nov 7, 2009·Nature Nanotechnology·Fengnian XiaPhaedon Avouris
Jun 22, 2010·Nature Nanotechnology·Sukang BaeSumio Iijima
Sep 10, 1996·Applied Optics·D DolfiP Granger
May 10, 2011·Nature·Ming LiuXiang Zhang
Jun 11, 2011·Science·Ashkan Vakil, Nader Engheta
Feb 16, 2012·Nano Letters·Ming LiuXiang Zhang
Feb 24, 2012·Applied Optics·Shuguang LiJianping Chen
Mar 2, 2012·Optics Letters·Ravi PantBenjamin J Eggleton
May 31, 2012·Nature Communications·Hansuek LeeKerry J Vahala
Jul 10, 2012·Nanoscale·Ji FengJu Li
May 2, 2013·Optics Letters·Ergun Simsek
Feb 4, 2014·Optics Letters·Wei ShiDavid V Plant
Mar 26, 2014·Optics Express·José CapmanyPascual Muñoz
Apr 4, 2015·Optics Express·Vito SorianelloMarco Romagnoli
Jun 1, 2016·Optics Letters·Abhijeet PhatakKeisuke Goda
Jun 30, 2016·Nanoscale·Jiaqi WangJianbin Xu
Jul 15, 2016·Applied Optics·Teresa TatoliMario N Armenise
Apr 1, 2017·Optics Letters·Iman AryanfarBenjamin J Eggleton
Citations
Jun 8, 2018·Applied Optics·Qian Qian SongKai Xin Chen
Jul 19, 2020·Optics Express·Gongcheng YueTiegen Liu
May 14, 2020·Applied Optics·Nimish Kumar Srivastava, Sanjeev Kumar Raghuwanshi
Feb 3, 2021·Optics Letters·Myunghwan KimSoeun Kim