Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of Modern Optics

New cross-coupled resonator induced shifted absorption (CRISA) in double microring resonators using a cross-coupling-structure technique

Benjamin B. Dingel, Bo Ye

Published Dec 15, 2022• 7 citations
Publisher

Abstract

We report, for the first time to the best of our knowledge, a technique that employs ′cross-coupling structure’ in the cascaded microring resonators (MRRs) to bring new optical analogues of quantum coherence phenomena. The new configuration resembles a standard double resonator (SDR) but uses cross-coupled–based directional couplers (DCs) instead of the typical direct-coupled–based DCs. One of its unique features is that it does not exhibit the typical SDR’s signature quantum coherence analogue effects like coupled-resonator induced transparency (CRIT) or coupled-resonator induced absorption (CRIA). On the contrary, it produces a new very narrow reflection dip positioned at single-pass phase shift θ = − π/2 which we refer to as cross-coupled resonator induced shifted absorption (CRISA). We compare extensively CRISA’s characteristics with the CRIT, CRIA, and Autler-Townes splitting (ATS) found in SDR. The technique opens up new configurations with richer optical behaviours that could find potentially still unexplored applications.

DOI
10.1080/09500340.2022.2159082

Related papers

Novel resonance manipulation method in coupled resonators using “coupling structure technique” for Quantum coherence effect and optical communication applications (Invited)

Benjamin B. Dingel

Recently, we reported a general technique that uses a “cross-coupling structure” as a new vehicle to manipulate the resonance features of the coupled resonators. The technique is important for the (i) search for new optical analogues of Quantum Coherence Effects (QCEs) and (ii) generation of fresh and richer optical behaviors of the coupled resonators that could open future applications in optical fiber communication. Here, we review two new configurations based on this technique. The first configuration uses a modified standard double resonator (SDR) which we refer to as Cross-coupled SDR (CC-SDR). It is a new analogue circuit of QCE that generates a new QC phenomenon we call Cross-coupled Resonator Induced Shifted Absorption (CRISA). It is the first-time a cross-coupled structure has been suggested in studying QCE. Its core mechanism is due to its “cross-coupling structure”. Second, we present a modified coupled ring reflector (CRR) configuration where its original directional couplers (DCs) are replaced with cross-coupler(s) to connect the two ring resonators. We refer to it as crisscrossed-assisted CRR (or X-CCR). We review the unique characteristics of these two configurations and discuss their applications as optical devices.

Wireless and Optical Communications Conference•May 5, 2023•5 citations

Transition between coupled-resonator-induced transparency and absorption

Shuting Guo, Yuhong Zhang, Liu-Le Wu +2 more

Electromagnetically induced transparency and absorption in atomic systems have applications such as slow-light generation. Coupled-resonator-induced transparency (CRIT) and absorption (CRIA) are the optical analogy to them. Here we theoretically and experimentally study CRIT and CRIA in two directly coupled whispering-gallery-mode microresonators. The theoretical results give conditions for observing CRIT and CRIA, and predict that a transition between them will happen if we change the coupling strength between the two microresonators or the coupling strength between the fiber taper and the first microresonator. The experimental results demonstrate the transitions between CRIT and CRIA using a microsphere coupled to a sausagelike microresonator. The obtained results give some guidelines to observe CRIT and CRIA.

Physical Review A•Mar 17, 2021•16 citations

Proposal to Produce Coupled Resonator-Induced Transparency and Bistability Using Microresonator Enhanced Mach–Zehnder Interferometer

Ying Lu, Lijuan Xu, Meiling Shu +2 more

We propose a microresonator scheme for a Mach-Zehnder interferometer in which a microresonator is side coupled to one arm and the other is inserted in the other arm, to produce coupled resonator-induced transparency (CRIT) and absorption (CRIA) effects. In this system, CRIT and CRIA effects with one effect next to another over a frequency range when two microresonators are identical and Fano-resonance line shape when the sizes of two microresonators are unequal are achieved. We also theoretically investigate the improving optical bistability characteristic based on CRIT.

IEEE Photonics Technology Letters•Mar 13, 2008•15 citations

Comparative Analysis of Electromagnetically Induced Transparency (EIT) in Various Ring Resonator Configurations

Charmaine C. Paglinawan, Arnold C. Paglinawan, Benjamin B. Dingel +1 more

Electromagnetically induced transparency (EIT) is a phenomenon where a narrow transparency window appears within an absorption band of a material due to quantum interference. This effect has significant applications in various fields, including slow light devices, optical filters, and sensors. This paper compares three prominent EIT implementation resonator structures: single direct-coupled, double coupler add-drop, standard double resonator (SDR), coupled ring reflector (CRR) and self-coupled optical waveguide (SCOW). We analyze their underlying mechanisms, performance characteristics, and suitability for different applications, supported by recent research from 2020 onwards. We also present simulated transmission spectra, using Lumerical Interconnect, for each configuration to visually illustrate their distinct features.

International Conference on Computer and Automation Engineering•Mar 20, 2025•3 citations

Induced transparency and pulse delay plus induced absorption and pulse advancement using the orthogonally polarized whispering gallery modes of a single microresonator

Khoa V. Bui

In this dissertation, the major research is to produce induced transparency and pulse delay or induced absorption and pulse advancement using orthogonally polarized whispering gallery TE and TM modes of a single microresonator (either microsphere or hollow bottle resonator). For background, we introduce the three-level atomic Lambda system, interacting with a probe field and a much stronger coupling field, in which destructive interference between the direct and indirect absorption paths between the ground and excited levels of the system produces the induced transparency feature in the probe transmission (EIT). Autler-Townes splitting (ATS) of the transmitted power occurs when the coupling field is strong. Constructive interference caused by the transfer of coherence and transfer of population between the hyperfine sublevels of the ground and excited states of the system can produce an induced absorption feature (EIA). These EIT/ATS and EIA effects enable slow and fast light. Next, we describe the coupled resonator induced transparency and absorption effects (CRIT, and CRIA). Due to the evanescent coupling between the coresonant whispering-gallery modes of the same polarization from two microspheres, the net throughput power in the coupled resonator system has features analogous to the EIT and EIA phenomena described previously. Then, we introduce two new methods to produce the EIT/EIA-like features of throughput power. The first method relies on the intracavity coupling between two orthogonally polarized TE and TM modes of very different quality factor Q when one mode (either TE or TM) is driven, and the second method uses the superposition of the orthogonal throughputs (in the absence of intracavity cross polarization mode coupling) when the two modes are simultaneously driven. In both cases, the throughput has the same polarization as the input. We refer to the behavior observed using the first method as coupled mode induced transparency and absorption (CMIT, CMIA) and the behavior of the second method as coresonant polarization induced transparency and absorption (CPIT, CPIA). Some predictions of the scattering model of these processes are presented here. In addition, the experiment-fitting by using both scattering and rotational models for CMIT/ATS with pulse delay and CMIA with both pulse delay and pulse advancement when using with microsphere and hollow bottle resonator are presented

•Jul 1, 2016•0 citations

Power enhancement and phase regimes in embedded microring resonators in analogy with electromagnetically induced transparency

Xiaoyan Zhou, Lin Zhang, Andrea M. Armani +3 more

Coupled microresonators exhibit great potential for nonlinear applications. In the present work, we explore the nonlinear performance of an embedded ring resonator analogous to an electromagnetically induced transparency (EIT) medium, also known as coupled resonator induced transparency (CRIT). Interestingly, an EIT-like amplitude response can have a remarkably different power enhancement factor that varies by more than one order of magnitude, which is attributed to the different phase regimes of the embedded micro-ring resonators. In addition to the non-monotonic phase profile reported in atomic EIT systems, the phase responses featuring 2 π and 4 π monotonic transitions are identified and analyzed. We also present an interesting phenomenon, in which the power enhancement changes greatly, even with the same transfer function (both intensity and phase responses). This reveals that wisely choosing the operating regime is critical to optimize nonlinear performance of the embedded double resonator system, without adding to design or fabrication difficulty.

Optics Express•Aug 20, 2013•30 citations
We report, for the first time to the best of our knowledge, a technique that employs ′cross-coupling structure’ in the cascaded microring resonators (MRRs) to bring new optical analogues of quantum coherence phenomena. The new configuration resembles a standard double resonator (SDR) but uses cross-coupled–based directional couplers (DCs) instead of the typical direct-coupled–based DCs. One of its unique features is that it does not exhibit the typical SDR’s signature quantum coherence analogue effects like coupled-resonator induced transparency (CRIT) or coupled-resonator induced absorption (CRIA). On the contrary, it produces a new very narrow reflection dip positioned at single-pass phase shift θ = − π/2 which we refer to as cross-coupled resonator induced shifted absorption (CRISA). We compare extensively CRISA’s characteristics with the CRIT, CRIA, and Autler-Townes splitting (ATS) found in SDR. The technique opens up new configurations with richer optical behaviours that could find potentially still unexplored applications.
Recently, we reported a general technique that uses a “cross-coupling structure” as a new vehicle to manipulate the resonance features of the coupled resonators. The technique is important for the (i) search for new optical analogues of Quantum Coherence Effects (QCEs) and (ii) generation of fresh and richer optical behaviors of the coupled resonators that could open future applications in optical fiber communication. Here, we review two new configurations based on this technique. The first configuration uses a modified standard double resonator (SDR) which we refer to as Cross-coupled SDR (CC-SDR). It is a new analogue circuit of QCE that generates a new QC phenomenon we call Cross-coupled Resonator Induced Shifted Absorption (CRISA). It is the first-time a cross-coupled structure has been suggested in studying QCE. Its core mechanism is due to its “cross-coupling structure”. Second, we present a modified coupled ring reflector (CRR) configuration where its original directional couplers (DCs) are replaced with cross-coupler(s) to connect the two ring resonators. We refer to it as crisscrossed-assisted CRR (or X-CCR). We review the unique characteristics of these two configurations and discuss their applications as optical devices.
Electromagnetically induced transparency and absorption in atomic systems have applications such as slow-light generation. Coupled-resonator-induced transparency (CRIT) and absorption (CRIA) are the optical analogy to them. Here we theoretically and experimentally study CRIT and CRIA in two directly coupled whispering-gallery-mode microresonators. The theoretical results give conditions for observing CRIT and CRIA, and predict that a transition between them will happen if we change the coupling strength between the two microresonators or the coupling strength between the fiber taper and the first microresonator. The experimental results demonstrate the transitions between CRIT and CRIA using a microsphere coupled to a sausagelike microresonator. The obtained results give some guidelines to observe CRIT and CRIA.
We propose a microresonator scheme for a Mach-Zehnder interferometer in which a microresonator is side coupled to one arm and the other is inserted in the other arm, to produce coupled resonator-induced transparency (CRIT) and absorption (CRIA) effects. In this system, CRIT and CRIA effects with one effect next to another over a frequency range when two microresonators are identical and Fano-resonance line shape when the sizes of two microresonators are unequal are achieved. We also theoretically investigate the improving optical bistability characteristic based on CRIT.
Electromagnetically induced transparency (EIT) is a phenomenon where a narrow transparency window appears within an absorption band of a material due to quantum interference. This effect has significant applications in various fields, including slow light devices, optical filters, and sensors. This paper compares three prominent EIT implementation resonator structures: single direct-coupled, double coupler add-drop, standard double resonator (SDR), coupled ring reflector (CRR) and self-coupled optical waveguide (SCOW). We analyze their underlying mechanisms, performance characteristics, and suitability for different applications, supported by recent research from 2020 onwards. We also present simulated transmission spectra, using Lumerical Interconnect, for each configuration to visually illustrate their distinct features.
In this dissertation, the major research is to produce induced transparency and pulse delay or induced absorption and pulse advancement using orthogonally polarized whispering gallery TE and TM modes of a single microresonator (either microsphere or hollow bottle resonator). For background, we introduce the three-level atomic Lambda system, interacting with a probe field and a much stronger coupling field, in which destructive interference between the direct and indirect absorption paths between the ground and excited levels of the system produces the induced transparency feature in the probe transmission (EIT). Autler-Townes splitting (ATS) of the transmitted power occurs when the coupling field is strong. Constructive interference caused by the transfer of coherence and transfer of population between the hyperfine sublevels of the ground and excited states of the system can produce an induced absorption feature (EIA). These EIT/ATS and EIA effects enable slow and fast light. Next, we describe the coupled resonator induced transparency and absorption effects (CRIT, and CRIA). Due to the evanescent coupling between the coresonant whispering-gallery modes of the same polarization from two microspheres, the net throughput power in the coupled resonator system has features analogous to the EIT and EIA phenomena described previously. Then, we introduce two new methods to produce the EIT/EIA-like features of throughput power. The first method relies on the intracavity coupling between two orthogonally polarized TE and TM modes of very different quality factor Q when one mode (either TE or TM) is driven, and the second method uses the superposition of the orthogonal throughputs (in the absence of intracavity cross polarization mode coupling) when the two modes are simultaneously driven. In both cases, the throughput has the same polarization as the input. We refer to the behavior observed using the first method as coupled mode induced transparency and absorption (CMIT, CMIA) and the behavior of the second method as coresonant polarization induced transparency and absorption (CPIT, CPIA). Some predictions of the scattering model of these processes are presented here. In addition, the experiment-fitting by using both scattering and rotational models for CMIT/ATS with pulse delay and CMIA with both pulse delay and pulse advancement when using with microsphere and hollow bottle resonator are presented
Coupled microresonators exhibit great potential for nonlinear applications. In the present work, we explore the nonlinear performance of an embedded ring resonator analogous to an electromagnetically induced transparency (EIT) medium, also known as coupled resonator induced transparency (CRIT). Interestingly, an EIT-like amplitude response can have a remarkably different power enhancement factor that varies by more than one order of magnitude, which is attributed to the different phase regimes of the embedded micro-ring resonators. In addition to the non-monotonic phase profile reported in atomic EIT systems, the phase responses featuring 2 π and 4 π monotonic transitions are identified and analyzed. We also present an interesting phenomenon, in which the power enhancement changes greatly, even with the same transfer function (both intensity and phase responses). This reveals that wisely choosing the operating regime is critical to optimize nonlinear performance of the embedded double resonator system, without adding to design or fabrication difficulty.