The imagination of nature is far, far greater than the imagination of man

- Richard Feynman

Radwanul Hasan Siddique

I am leading the Metaphotonics research group to advance Samsung's imaging and sensing research based on bioinspired and nanophotonic principles within Image Sensor Lab of Samsung Semiconductor Inc. located in Pasadena, USA.

I was a Postdoctoral Scholar in the Division of Engineering & Applied Science (EAS) at the California Institute of Technology (Caltech), USA. I have received my Ph.D. (summa cum laude) from Karlsruhe Institute of Technology (KIT), Germany in 2016.

Currently, I am developing bio-inspired nanophotonic devices and sensors for optoelectronic & biomedical applications. 


December 24, 2019

Our recent development on aluminum based metasurfaces for highly efficient and low-cost multiplexed biosensing published in ACS Nano

Aluminum metasurfaces with multipolar resonances are developed for brighter, broadband and multiplexed biosensing and featured as a supplementary cover in ACS Nano (Volume 13, Issue 12, pages 13605-14558).

July 25, 2019

We get an inside front cover in Nanoscale!

One more application of our biomimetic metasurface! Our scalable biomimetic Au metasurfaces for detection of low-concentration nucleic acids featured as an inside front cover of August 2019 (Volume 11, Issue 29) of Nanoscale!  

July 01, 2019

Joined Samsung Advanced Institute of Technology (SAIT) - USA as a Research Team Lead

I am leading the Metaphotonics research group to advance Samsung's imaging and sensing research based on bioinspired and nanophotonic principles within Image Sensor Lab of Samsung Semiconductor Inc. located in Pasadena, USA.

May 09, 2019

First US Patent on intraocular pressure antifouling implants is published online!

Application Number: 16/122732

Publication Date: 05/09/2019

Filing Date: 09/05/2018

Assignee: California Institute of Technology (Pasadena, CA, US) 

International Classes: A61B3/16

March 16, 2019

Outreach - Science For March with PCC and Caltech

Learning Nanophotonics from Butterflies! Perfect outreach with Pasadena community college students during #ScienceForMarch event at Caltech especially when painted lady butterflies are migrating all over Pasadena!

December 18, 2018

2018 ends with a bang - we get an inside cover!

Our Raman-mode constraining-based implantable glucose sensor work featured as an inside cover of December 2018 (Volume 90, Issue 24) of Analytical Chemistry!  

October 26, 2018

Awarded VDI International Bionic Award 2018 from The Association of German Engineers

I am awarded the International Bionic Award 2018 along with my KIT colleagues Mr. Yidenekechaw Donie and Dr. Guillaume Gomard for our work "Butterfly-inspired photonic nanostructures for energy and healthcare applications". The International Bionic Award is endowed with 10.000 EUR by the Schauenburg-Foundation and will be awarded by VDI - The Association of German Engineers 


The prize was presented by the Schauenburg Foundation at the congress on Biomimetics "Patents from Nature" on the evening of the October 26th, 2018 at Bremen City Hall.

October 01, 2018

Upcoming talks & seminars

October 15 - Patel lab, UC Berkeley

October 16 - Berkeley Sensor & Actuator Center, UC Berkeley

November 1 - Nano Thermal Energy Research Group, UC Irvine

November 26 - MRS Fall Meeting, Symposium BM08, Boston

November 28 - Center for Nanoscale Systems, Harvard University 

November 29 - Seminar series on soft materials, structures & devices, MIT 

June 06, 2018

Bio-inspired Glaucoma sensor work grabs the second best outstanding paper award in Hilton Head 2018

Congrats Vinayak to grab the outstanding paper award in such a prestigious and competitive MEMS conference.

June 06, 2018

Our work featured in Nature Nanotechnology News & Views: Nature-inspired sensors

Prof. Wolfgang Fink crafted a perfect News & Views on our recently developed biomimetic device that mimic butterfly wing nanostructures to fight against glaucoma in the June 2018 edition of Nature Nanotechnology journal.

May 01, 2018

Caltech press release on Bioinspired nanostructures for medical implants

The work on bioinspired nanostructures for medical implants got highlighted by several international press including Caltech! For more details, please check the Media Coverage page ...

April 30, 2018

Bio-inspired multifunctional nanostructures for medical implants: Published in Nature Nanotechnology

Numerous living organisms possess biophotonic nanostructures that provide colouration and other diverse functions for survival. While such structures have been actively studied and replicated in the laboratory, it remains unclear whether they can be used for biomedical applications. Here, we show a transparent photonic nanostructure inspired by the longtail glasswing butterfly (Chorinea faunus) and demonstrate its use in intraocular pressure (IOP) sensors in vivo. We exploit the phase separation between two immiscible polymers (poly(methyl methacrylate) and polystyrene) to form nanostructured features on top of a Si3N4 substrate. The membrane thus formed shows good angle-independent white-light transmission, strong hydrophilicity and anti-biofouling properties, which prevent adhesion of proteins, bacteria and eukaryotic cells. We then developed a microscale implantable IOP sensor using our photonic membrane as an optomechanical sensing element. Finally, we performed in vivo testing on New Zealand white rabbits, which showed that our device reduces the mean IOP measurement variation compared with conventional rebound tonometry without signs of inflammation.

March 06, 2018

Blue tarantula inspired non-iridescent photonics is chosen among the best of Advanced Optical Materials 2017!

Our paper on Blue tarantula inspired non-iridescent photonics is chosen among the best of Advanced Optical Materials 2017! It's now free to read!

March 06, 2018

Our paper on biophotonic nanostructures for biomedical applications accepted for publication in Nature Nanotechnology!

January 03, 2018

Our work on peacock spider coloration is highlighted in Nature research highlights!

December 22, 2017

Bio-inspired diffractive optics: Published in Nature Communications

Brightly colored Australian peacock spiders (Maratus spp.) captivate even the most arachnophobic viewers with their flamboyant courtship displays featuring diverse and intricate body colorations, patterns, and movements – all packed into miniature bodies measuring less than five millimeters in size for many species. However, these displays are not just pretty to look at. They also inspire new ways for humans to produce color in technology. We  investigated the spider’s photonic structures using techniques that included light and electron microscopy, hyperspectral imaging, imaging scatterometry and optical modeling to generate hypotheses about how the spider’s scale generate such intense rainbows. Our team then used cutting-edge nano 3D printing to fabricate different prototypes to test and validate their hypotheses. In the end, we found that the intense rainbow iridescence emerged from specialized abdominal scales on the spiders. These scales combine an airfoil-like microscopic 3D contour with nanoscale diffraction grating structures on the surface. It is the interaction between the surface nano-diffraction grating and the microscopic curvature of the scales that enables separation and isolation of light into its component wavelengths at finer angles and smaller distances than are possible with current engineering technologies.

November 27, 2017

Invited as a speaker for MRS Fall Meeting 2017 at Symposium BM03!

Presented our work on the integration of the biophotonic nanostructures to implantable and sensing devices in the MRS Fall Meeting 2017 at Symposium BM03: Biological and Bioinspired Materials for Photonics and Electronics—From Living Organisms to Devices. Thank you organizers for the invite and for organizing such a wonderful symposium! 

November 01, 2017

Press release on disordered nanostructures of black butterfly for thin photovoltaic applications

The work on disordered nanostructures of black butterfly for thin photovoltaic applications got highlighted by several German and international press including KIT! For more details, please check the Media Coverage page ...

October 29, 2017

My butterflies participated in Caltech Outreach Activities

My butterflies had a great time  at the first annual Pasadena monarch festival at Washington Park, celebrating Pasadena's status as a monarch city. We shared research about using what is known about insect nanostructures to engineer better medical and optoelectronic devices. Thanks to event organizer Kristy Brauch for inviting us!

October 31, 2017

Black butterfly is live on Science Radio!

Catch my conversation with the Science Radio discussing our work on black butterfly inspired nanostructures for solar cell applications!

October 19, 2017

Light management by bio-inspired disordered nanostructures: Published in Science Advances

Photon management and light trapping in thin-film solar cells have been an active field of research for over half a decade now. Interestingly, some of the black butterflies have been doing that for millions of years to regulate their body temperature. And, nature has always found the best engineering route to solve any problem!

Therefore, we extracted the working and design principle of those butterflies and applied it on a photovoltaic absorber in a simple possible manner!

August 03, 2017

LSA paper is the most downloaded paper of the month of July 2017!

Light: Science & Applications Top 10

May 29, 2017

Invited as a speaker for 644. WE-Heraeus- Seminar in Germany!

Presented our work at Caltech at Physikzentrum Bad Honnef, Germany. Thank you Wilhelm und Else Heraeus-Stiftung Foundation for the invitation!

April 21, 2017

First article on beetle nanostructures: Published in Scientific Reports!

Check out our new article on replicating  the complex light-scattering nanostructures of white beetles! Thanks again Silvia and BIP goup at Cambidge for introducing me to white beetles!

February 17, 2017

Fresh from the press: article got accepted in Light: Science & Applications!

This is the outcome of my research visit at University of Cambridge. I thank Silvia and Jan to make it possible.It was indeed a great learning experience. We probably have shown the first true demonstration of visible-IR SERS by aluminium nanostructures. Usually aluminum is only used for UV SERS as the material has an inherent plasmonic signature at the UV wavelengths. By tweaking the geometry of our surface, we can achieve a broadband SERS response. This broad strong plasmonic response, extending from the UV to the NIR, originates from the precise engineering of sub-10-nm nanogaps.

January 21, 2017

Bio-inspired Nanophotonics meets Bangladesh!

I presented my work on bio-inspired nanophotonics at different universities in Bangladesh; including my almamater Bangladesh University of Engineering and Technology (BUET), BRAC University and University of Liberal Arts, Bangladesh (ULAB). I was truly amazed with the engagement of young researchers after the talks. All the talks were arranged under different chapters of IEEE Bangladesh section.

January 18, 2017

We got a coverpage!

Our Tarantula work featured as a cover page of January 2017 issue 2 of Advanced Optical Materials!  

December 24, 2016

Among the most downloaded paper for the consecutive month of December 2016!

Advanced Optical Materials Top 5 – December 2016

November 29, 2016

New class of bio-inspired random plasmonic metasurface presented at MRS Fall Meeting 2016!

Biomimetics based on photonic structures found in nature inspires unconventional design principles to create unique and highly functional dielectric-based nanophotonics. On the other hand, plasmonic metasurfaces break the diffraction limits and localize light into subwavelength dimensions by coupling light with electron oscillations in metals with the aid of nanoscale metal-dielectric architectures. Here, we combine a biomimetic design of random nanoholes with plasmonics to create a large scale flexible metal-dielectric metasurfaces for biosensing applications.

It was also fun catching up biomimetics colleagues and friends and chairing a session for the first time!

November 18, 2016

How nature uses physics to create blue: Interview with

The Blue Diadem butterfly, found on the African continent, is roughly the size of a saucer with wings spread. It wasn’t pigment that turned the butterfly’s wings a radiant cornflower blue, but what was it? Read my interview with 

October 19, 2016

Press release on structural colors of spider

The work on structural colors of spiders got highlighted by several German and international press including KIT! For more details, please check the Media Coverage page ...

November 15, 2016

Tarantula paper among the most downloaded paper of the month November 2016

Advanced Optical Materials Top 5 – November 2016

November 02, 2016

Structural color of Hypolimnas salmacis are explained and published in Nature Scientific Reports!

How to get blue color out of white and brown, impossible with conventional color mixing! Again, mother nature teaches us how to think beyond the conventional spectral blending and how to exploit the toolbox of photonics to achieve such interesting phenomena! Here, we analyse the mechanisms responsible for such colouration on the dorsal wings of Hypolimnas salmacis and experimentally demonstrate that the lower thin lamina in the white cover scales causes the blue iridescence. This outcome contradicts other studies reporting that the radiant blue in Hypolimnasbutterflies is caused by complex ridge-lamellar architectures in the upper lamina of the cover scales. Our comprehensive optical study supported by numerical calculation however shows that scale stacking primarily induces the observed colour appearance of Hypolimnas salmacis.

October 11, 2016

Photonic structures with long-range order are inherently iridescent, suggesting by current theory. Contrary to this paradigm and inspired by biological photonic structures from hairs of blue tarantulas, a non-iridescent photonic structure with long-range order is shown here. This photonic structure is hierarchical and has high degrees of rotational symmetry in suitable spatial scales.

October 10, 2016

Welcome to my webpage!

Thank you for stopping by! Please stay in touch with my research activities on biomimetics! For any queries, feel free to contact me! 

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