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Shekhar S, Bogaerts W, Chrostowski L, Bowers JE, Hochberg M, Soref R, Shastri BJ. Roadmapping the next generation of silicon photonics. Nat Commun 2024; 15:751. [PMID: 38272873 PMCID: PMC10811194 DOI: 10.1038/s41467-024-44750-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 01/03/2024] [Indexed: 01/27/2024] Open
Abstract
Silicon photonics has developed into a mainstream technology driven by advances in optical communications. The current generation has led to a proliferation of integrated photonic devices from thousands to millions-mainly in the form of communication transceivers for data centers. Products in many exciting applications, such as sensing and computing, are around the corner. What will it take to increase the proliferation of silicon photonics from millions to billions of units shipped? What will the next generation of silicon photonics look like? What are the common threads in the integration and fabrication bottlenecks that silicon photonic applications face, and which emerging technologies can solve them? This perspective article is an attempt to answer such questions. We chart the generational trends in silicon photonics technology, drawing parallels from the generational definitions of CMOS technology. We identify the crucial challenges that must be solved to make giant strides in CMOS-foundry-compatible devices, circuits, integration, and packaging. We identify challenges critical to the next generation of systems and applications-in communication, signal processing, and sensing. By identifying and summarizing such challenges and opportunities, we aim to stimulate further research on devices, circuits, and systems for the silicon photonics ecosystem.
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Affiliation(s)
- Sudip Shekhar
- Department of Electrical & Computer Engineering, University of British Columbia, 2332 Main Mall, Vancouver, V6T1Z4, BC, Canada.
| | - Wim Bogaerts
- Department of Information Technology, Ghent University - IMEC, Technologiepark-Zwijnaarde 126, Ghent, 9052, Belgium
| | - Lukas Chrostowski
- Department of Electrical & Computer Engineering, University of British Columbia, 2332 Main Mall, Vancouver, V6T1Z4, BC, Canada
| | - John E Bowers
- Department of Electrical & Computer Engineering, University of California Santa Barbara, Santa Barbara, 93106, CA, USA
| | - Michael Hochberg
- Luminous Computing, 4750 Patrick Henry Drive, Santa Clara, 95054, CA, USA
| | - Richard Soref
- College of Science and Mathematics, University of Massachusetts Boston, 100 William T. Morrissey Blvd., Boston, 02125, MA, USA
| | - Bhavin J Shastri
- Department of Physics, Engineering Physics & Astronomy, Queen's University, 64 Bader Lane, Kingston, K7L3N6, ON, Canada.
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2
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Yang CC, Su X, Zheng QZ, Chen J, Tian WQ, Li WQ, Yang L. The search for a maximum of the D-π-A paradigm for second order nonlinear optical molecular materials. Phys Chem Chem Phys 2023; 25:31481-31492. [PMID: 37962477 DOI: 10.1039/d3cp03756h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Push-pull π-conjugated molecules are one of the paradigms of second order nonlinear optical (NLO) materials and have been extensively explored. However, high-performance second order NLO materials with an optimum electron donor (D), π-bridge (π) and acceptor (A) under this paradigm are still the most sought-after. In the present work, D-π-A molecules with optimal D, π and A combination for strong second order NLO properties are proposed based on molecular orbital theories. The optimal D-π-A push-pull molecule achieves an unprecedentedly strong NLO response under the D-π-A paradigm, i.e., the static first hyperpolarizability reaches -453.92 × 10-30 esu per heavy atom using azulene as part of the π-bridge and acceptor to synergistically reinforce the strength of the acceptor. The protocols of D-π-A NLO molecule design through frontier molecular orbital matching of D, π and A with optimal combination of electron donating and accepting strengths shed light on future molecular NLO materials exploration. The simulated two-dimensional second order spectra provide useful information (e.g., sum frequency generation) on the applications of those D-π-A push-pull molecules in nonlinear optics.
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Affiliation(s)
- Cui-Cui Yang
- College of Science, Chongqing University of Technology, Chongqing 400054, China
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
| | - Xiao Su
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
| | - Qi-Zheng Zheng
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
| | - Jiu Chen
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
| | - Wei Quan Tian
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
| | - Wei-Qi Li
- Department of Physics, Harbin Institute of Technology, Harbin 150001, China.
- Technology Innovation Center of Materials and Devices at Extreme Environment, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, P. R. China
| | - Ling Yang
- Wenzhou Institute, University of Chinese Academy of Sciences, 1 Jinlian Street, Wenzhou 325001, China.
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Jana K, Sarkar D, Jaiswal P, Moorthy JN. Synthesis and Excited-State Properties of Donor-Acceptor Azahelical Coumarins. J Org Chem 2023. [PMID: 37114852 DOI: 10.1021/acs.joc.2c02810] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
A set of three donor-acceptor azahelical coumarins (DA-AHCs), namely, H-AHC, Me-AHC, and Ph-AHC, were rationally designed and synthesized, and their excited-state properties were comprehensively investigated. All three DA-AHCs are shown to display very high fluorosolvatochromic shifts as a result of significant intramolecular charge transfer in their excited states. The para-quinoidal forms of the latter apparently contribute predominantly to large dipole moments in their excited states. By virtue of the fact that these helical systems structurally incorporate a highly fluorescent coumarin dye, they exhibit high quantum yields in both solution and solid states. Indeed, their emission behaviors in the crystalline media are shown to be remarkably correlated with their respective crystal packings. Incisive analyses demonstrate (i) strengthening of hydrogen bonding in the excited state promotes quenching (H-AHC), (ii) efficient crystal packing promotes high emission (Me-AHC) by precluding deactivations via vibrational motions, and (iii) loose crystal packing contributes to excited-state deactivation to account for low quantum yields of emission (Ph-AHC).
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Affiliation(s)
- Kanyashree Jana
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Debarghya Sarkar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Preeti Jaiswal
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Jarugu Narasimha Moorthy
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695551, India
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Yang CC, Ye J, Quan Tian W, Li WQ, Yang L. Butterfly-Shaped Nanographenes with Excellent Second-Order Nonlinear Optical Properties: The Synergy of B/N and Azulene. Chemistry 2023; 29:e202203110. [PMID: 36305483 DOI: 10.1002/chem.202203110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Indexed: 11/07/2022]
Abstract
Azulene, a simple polar polycyclic aromatic hydrocarbon with connected electron donor and acceptor (DA), ignites the hope of designing second-order nonlinear optical (NLO) molecular materials from pure nonpolar carbon nanomaterials. In this work, a butterfly-shaped nanographene (π-DA-π) was designed by incorporating azulene between two coronenes. One more electron in a N atom or one electron fewer in a B atom with respect to a C atom can polarize charge distribution in carbon nanomaterials, and further doping of B and N in the designed butterfly-shaped nanographene changes the system from π-DA-π to D-π-A, leading to strong NLO responses. For example, the largest static first hyperpolarizability even reaches 173.89×10-30 esu per heavy atom. The synergetic role of B, N and azulene in the nanographene is scrutinized, and such a doping strategy is found to provide an effective means for the design of carbon-based functional materials. The strong second-order NLO responses of these butterfly-shaped carbon-based nanographenes under external fields, for example, sum frequency generation and difference frequency generation, could inspire future experimental exploration.
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Affiliation(s)
- Cui-Cui Yang
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, 401331, Chongqing, P. R. China
| | - Jing Ye
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, 401331, Chongqing, P. R. China
| | - Wei Quan Tian
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, 401331, Chongqing, P. R. China
| | - Wei-Qi Li
- School of Physics, Harbin Institute of Technology, 150001, Harbin, P. R. China.,Technology Innovation Center of Materials and, Devices at Extreme Environment, School of Materials Science and Engineering, Harbin Institute of Technology, 150001, Harbin, P. R. China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, 030006, Taiyuan, P. R. China
| | - Ling Yang
- Wenzhou Institute, University of Chinese Academy of Sciences, 1 Jinlian Street, 325001, Wenzhou, P. R. China
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Synthesis of D-π-A'-π-A Chromophores with Quinoxaline Core as Auxiliary Acceptor and Effect of Various Silicon-Substituted Donor Moieties on Thermal and Nonlinear Optical Properties at Molecular and Material Level. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020531. [PMID: 36677590 PMCID: PMC9867400 DOI: 10.3390/molecules28020531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 12/26/2022] [Accepted: 12/28/2022] [Indexed: 01/06/2023]
Abstract
Novel D-π-A'-π-A chromophores with quinoxaline cores as auxiliary acceptors and various donor moieties (aniline, carbazole, phenothiazine, tetrahydroquinoline) containing bulky tert-butyldimethylsilyloxy (TBDMSO) groups and tricyanofuranyl (TCF) acceptors with bulky cyclohexylphenyl substituents were synthesized via eight- to nine-step procedures, and their photo-physical and thermal properties were investigated. The values of the chromophores' first hyperpolarizabilities were calculated in the framework of DFT at the M06-2X/aug-cc-pVDZ computational level; the effect of the introduction of the TBDMSO group into the donor fragment is shown to be inessential, as this group is not coupled to the π-conjugated system of the chromophore. The chromophore with the tetrahydroquinoline donor has a first hyperpolarizability value of 937 × 10-30 esu, which is the highest for the studied chromophores. Atomistic modeling of composite materials with the studied chromophores as guests demonstrated that the presence of bulky substituent in the donor fragment prevents notable aggregation of chromophores, even at high chromophore content (40 wt.%). The nonlinear optical performance of guest-host materials with 25 and 40 wt.% of suggested chromophore content was studied using a second harmonic generation technique to give the NLO coefficient, d33 up to 52 pm/V.
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Liu T, Huo F, Ge C, Li Y, He J, Zheng H, He Q, Zhao Y, Chen Z, Bo S. Systematic Study on Nonlinear Optical Chromophores with Improved Electro-Optic Activity by Introducing 3,5-Bis(trifluoromethyl)benzene Derivative Isolation Groups into the Bridge. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020488. [PMID: 36677549 PMCID: PMC9862648 DOI: 10.3390/molecules28020488] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/29/2022] [Accepted: 01/02/2023] [Indexed: 01/07/2023]
Abstract
A series of novel chromophores A, B, C, and D, based on the julolidinyl donor and the tricyanofuran (TCF) and CF3-tricyanofuran (CF3-Ph-TCF) acceptors, have been synthesized and systematically investigated. The 3,5-bis(trifluoromethyl)benzene derivative isolation group was introduced into the bridge in the chromophores C and D. These nonlinear optical chromophores showed good thermal stability, and their decomposition temperatures were all above 220 °C. Density functional theory (DFT) was used to calculate the energy gaps and first-order hyperpolarizability (β). The macroscopic electro-optic (EO) activity was measured using a simple reflection method. The highest EO coefficient of poled films containing 35 wt% of chromophore D doped in amorphous polycarbonate afforded values of 54 pm/V at 1310 nm. The results indicate that the 3,5-bis(trifluoromethyl)benzene isolation group can suppress the dipole-dipole interaction of chromophores. The moderate r33 value, good thermal stability, and good yield of chromophores suggest their potential use in the nonlinear optical area.
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Affiliation(s)
- Tongtong Liu
- Optoelectronics Research Centre, School of Science, Minzu University of China, Beijing 100081, China
- Engineering Research Centre of Photonic Design Software, Ministry of Education, Beijing 100081, China
| | - Fuyang Huo
- Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Correspondence: (F.H.); (Z.C.); (S.B.)
| | - Changqing Ge
- Optoelectronics Research Centre, School of Science, Minzu University of China, Beijing 100081, China
- Engineering Research Centre of Photonic Design Software, Ministry of Education, Beijing 100081, China
| | - Ya Li
- Optoelectronics Research Centre, School of Science, Minzu University of China, Beijing 100081, China
- Engineering Research Centre of Photonic Design Software, Ministry of Education, Beijing 100081, China
| | - Jing He
- Optoelectronics Research Centre, School of Science, Minzu University of China, Beijing 100081, China
- Engineering Research Centre of Photonic Design Software, Ministry of Education, Beijing 100081, China
| | - Han Zheng
- Optoelectronics Research Centre, School of Science, Minzu University of China, Beijing 100081, China
- Engineering Research Centre of Photonic Design Software, Ministry of Education, Beijing 100081, China
| | - Qian He
- Optoelectronics Research Centre, School of Science, Minzu University of China, Beijing 100081, China
- Engineering Research Centre of Photonic Design Software, Ministry of Education, Beijing 100081, China
| | - Yinsen Zhao
- Optoelectronics Research Centre, School of Science, Minzu University of China, Beijing 100081, China
- Engineering Research Centre of Photonic Design Software, Ministry of Education, Beijing 100081, China
| | - Zhuo Chen
- Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Correspondence: (F.H.); (Z.C.); (S.B.)
| | - Shuhui Bo
- Optoelectronics Research Centre, School of Science, Minzu University of China, Beijing 100081, China
- Engineering Research Centre of Photonic Design Software, Ministry of Education, Beijing 100081, China
- Correspondence: (F.H.); (Z.C.); (S.B.)
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Elder DL, Dalton LR. Organic Electro-Optics and Optical Rectification: From Mesoscale to Nanoscale Hybrid Devices and Chip-Scale Integration of Electronics and Photonics. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c03836] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Delwin L. Elder
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Larry R. Dalton
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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