|장소||E6-2 #1323 (1st floor)|
|일시||Sep. 29th(Thu), 4PM|
|연사||Dr. Sangyoon Han, Department of Physics, KAIST|
Large-scale Silicon Photonic MEMS Switches
Sep. 29th(Thu), 4PM, E6-2 #1323 (1st floor)
Dr. Sangyoon Han, Department of Physics, KAIST
Fast optical-circuit-switches (OCS) having a large number of ports can significantly enhance the performance and the efficiency of modern data centers by actively rearranging network patterns. Commercially available optical switches operating with the use of moving mirror arrays have port counts exceeding 100x100 and insertion losses fewer than a few dBs. However, their switching speeds are typically tens-of-milliseconds which limits their applications in highly dynamic traffic patterns.
Recently, optical switches based on silicon photonics technology have been designed and built. Silicon photonic switches with microsecond or nanosecond response times have been demonstrated, and silicon photonic switches with integrated CMOS driving circuits have been demonstrated. However, the demonstrations were mostly limited to a small number of ports due to their cascaded 2x2 architecture which induces high optical losses as port-count increases. Moreover, the demonstrations were limited to single polarization operations, and narrow spectral bandwidths.
In this talk, I will introduce a new architecture for silicon photonic switches that is highly scalable (optical insertion loss < 1 dB regardless of port-count), polarization-insensitive (< 1dB of PDL), and ultra-broadband (~300nm). The new architecture uses a two-level waveguide-crossbar with moving waveguide couplers that configure light paths. Three experimental implementations of the new architecture with 50x50 ports will be shown in the talk.
Sangyoon Han is a postdoctoral research associate in the Physics department at KAIST. He received his Ph.D. in Electrical Engineering and Computer Sciences from the University of California, Berkeley in 2016. He received his B.S. in Electrical Engineering from Seoul National University. He was a recipient of Korea Foundation for Advanced Studies Scholarship for study abroad, and he was a recipient of a graduate bronze medal from Collegiate Inventors Competition (USPTO sponsored) in 2015.
|공지||2019/09/18 - 12/5||Seminar Room #1323||Prof. David Schuster and etc.||Fall 2019: Physics Seminar Serises|
|공지||2019/09/02 - 12/09||Seminar Room 1501||이호성 박사 (한국표준과학연구원) and etc.||Fall 2019: Physics Colloquium|
|66||June 4 (Tue.), 5:00 PM||#1323, E6-2||Prof. Minsu Kim||Stochastic nature of bacterial eradication using antibiotics|
|65||May 31 (Fri.), 11:00 AM||#1323, E6-2||Prof. Guido Burkard||Cavity QED with Spin Qubits|
|64||May 24 (Fri.), 16:00 PM||#1323, E6-2||Prof. Soonjae Moon||Infrared spectroscopy study on metal-insulator transitions in layered perovskite iridates|
|63||May 30 (Thu.), 16:00 PM||#1323, E6-2||Prof. Chang-Hee Cho||Tuning the excitonic properties of semiconductors with light-matter interactions|
|62||November 14 (Thu.), 16:00 PM||#1323, E6-2||Prof. Ji-Hun Kang||Semi-classical model of polariton propagation|
|61||November 28 (Thu.), 16:00 PM||#1323, E6-2||Prof. Kyung Taec Kim||Generation of coherent EUV emissions using ultrashort laser pulses|
|60||December 3 (Tue.), 4:00 PM||#1323, E6-2||Dr. Jong Mok Ok||Toward Quantum Materials with Correlated Oxides|
|59||December 5 (Thu.), 16:00 PM||#1323, E6-2||Prof. Soon-Hong Kwon||Subwavelenth Photonic Devices: From Single Photon Sources to Solar Cell|
|58||December 13 (Fri.), 1:30-4:30 PM||#1323, E6-2||Biophysics Mini-symposium at KAIST|
|57||June 17 (Mon.), 10:30 AM||#1323, E6-2||Dr. See-Hun Yang||Chiral Spintronics|
|56||June 28 (Fri.), 13:30 PM||#1323, E6-2||Dr. Yusuke Kozuka||Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures|
|55||July 30 (Tue), 4:00 PM||#1323, E6-2||Dr. Mingu Kang||Dirac fermions and flat bands in correlated kagome metals|
|54||2019. 8. 22 4PM & 8. 23 3PM||#1323, E6-2||Prof. Andrew N Cleland||Physics and Applications in Nanoelectronics and Nonomechanics|
|53||September 18(Wed.), 16:00PM||#1323, E6-2||Prof.David Schuster||Exploring Synthetic Quantum Matter in Superconducting Circuits|
|52||September 26 (Thu.), 16:00 PM||#1323, E6-2||Han Seb Moon||Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble|
|51||October 15 (Tue.), 16:00 PM||#1323, E6-2||Prof. Pilkyung Moon||Moiré superlattices and graphene quasicrystal|
|50||October 17 (Thu.), 16:00 PM||#1323, E6-2||Prof. Namkyoo Park||Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing|
|49||Oct. 25 (Fri), 15:00 ~||#1323, E6-2||Daesu Lee,Junwoo Son,MyungJoon Han ,Siheon Ryee,Eun-Gook Moon||Physics Seminar|
|48||October 29 (Tue.), 14:30 PM||#1323, E6-2||Prof. Jörg Wrachtrup||Quantum sensing|
|47||November 5 (Tue.), 4:00 PM||#1323, E6-2||Dr. Shik Shin||Study on nanomaterials by the development of ultrahigh resolution laser-photoelectron microscopy (PEEM)|