Our faculty members publish their works in prestigious research journals. Take a look at what we have been working on here.
Department Highlights
PhD Admissions 2021/22
16 October 2020The Department of Physics now invites applications for admission to Doctor of Philosophy (PhD) programme at CityU in 2021/22.
The Department excels in research over a wide range of topics, and supports PhD studies in the following areas (but not limited to):
MSc Applied Physics Admissions 2021/22
24 Nov 2020The Department of Physics now invites applications for admission to our taught postgraduate programme, Master of Science in Applied Physics, in 2021/22.
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Undergraduate Admissions 2021
28 Oct 2020Our BSc Physics programme equips students with knowledge and critical thinking skills that will enable them to tackle difficult problems throughout their careers.
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Low-dimensional Systems
Low-dimensional Systems
Observation of the Kondo screening cloud
Nature
In research published in Nature, an international research group has ended a fifty-year quest by directly observing a quantum phenomenon known as a Kondo screening cloud. This phenomenon, which is important for many physical phenomena such as high-temperature superconductivity, is essentially a cloud that masks magnetic impurities in a material. It was known to exist but its spatial extension had never been experimentally observed, creating controversy over whether such an extension actually existed.
Read more at Nature:
https://www.nature.com/articles/s41586-020-2058-6
The paper has also featured in CityU Research:
https://www.cityu.edu.hk/research/stories/2020/03/12/worlds-first-experimental-observation-kondo-cloud
11 Mar 2020
Atomic, Molecular, and Optical Physics
Applied Physics
Atomic, Molecular, and Optical Physics
Applied Physics
Ultra-dense optical data transmission over standard fibre with a single chip source
Nature Communications
Optical micro-combs are tiny optical structures that convert a single laser into many different wavelengths of light. These devices have been used in a wide range of exciting demonstrations, including optical communications. The key to micro-combs are optical resonator structures, tiny rings (see picture) that when hit with enough light convert the incoming single wavelength into a precise rainbow of wavelengths. This work uses a novel kind of micro-comb called a “solition crystal”, that produces 80 separate wavelengths of light that can carry different signals at the same time. To prove the micro-comb could be used in a real-world environment, we transmitted the data through installed optical fibres in Melbourne (provided by AARNet) between RMIT’s City campus and Monash’s Clayton campus and back, for a round trip of 75 kilometres and demonstrated data transmission at > 40 Tbps. A world record in terms of spectral efficiency on a standard optical fiber.
Read more at Nature Communications:
https://www.nature.com/articles/s41467-020-16265-x
The paper has featured in CityU Research News:
https://www.cityu.edu.hk/media/news/2020/07/06/new-chips-accelerate-data-transmission
The paper has also featured in CityU Research Stories:
https://www.cityu.edu.hk/research/stories/2020/07/02/new-chips-developed-cityu-physicist-help-break-spectral-efficiency-record-optical-data-transmission
Please click the following links for media coverage:
- Australia 'records fastest internet speed ever' [BBC News] 2020-05-22 Technology
- 'Fastest ever' internet speed capable of downloading 1,000 HD movies in under a second is recorded in Australia - and it is four million times faster than the country's average connection [Daily Mail] 2020-05-22 Science & Tech
- Internet traffic is growing 25% each year. We created a fingernail-sized chip that can help the NBN keep up [The Conversation] 2020-05-22 Science & Technology
- World's fastest internet speed from a single optical chip [Science Daily] 2020-05-22 Science News
- Un record de débit Internet atteint par des scientifiques australiens [Radio-Canada] 2020-05-23 Techno
- 云爾錄 :城大研超快芯片 1秒下載千套戲 [Hong Kong Economic Journal] 2020-07-06 A16 獨眼香江 獨眼香江 紀曉風
- 城大研高速晶片傳輸速度全球最快 [Sing Tao Daily] 2020-07-06 F01 教育
- 城大研芯片 少於1秒下載千部高清電影 [Hong Kong Economic Times] 2020-07-06 A18 港聞
- 城大研新型芯片 一秒內下載千套戲 [Oriental Daily News] 2020-07-06 A13 港聞
- 1秒下載千套高清電影 城大研新芯片 網速升至史上最快 [Sky Post] 2020-07-06 P08 港聞
- 城大研新型芯片 1 秒下載千部電影 [Hong Kong Commercial Daily] 2020-07-06 A09 香港新聞
- 城大新芯片1 秒下載千部高清戲 [Lion Rock Daily] 2020-07-06 P07 港聞
- 城大研究高速晶片 傳輸速度全球最快 [BASTILLE POST] 2020-07-06
- 城大研高速晶片 傳輸速度全球最快 [Headline Daily online] 2020-07-06
- 1秒下載千套高清電影 城大研新芯片 網速升至史上最快 [HKET online] 2020-07-06
- CityU scholars develops new data chips [OpenGov Asia] 2020-07-08 Digital Transformation
22 May 2020
Education
Our Programmes
We aim to equip our students with knowledge and critical thinking skills that benefit them in physical-science-related careers and beyond. Explore our programmes below!
