"Ultralow and glass-like thermal conductivity of hexagonal perovskite chalcogenide single crystals", B. Sun, S. Niu, N. Shulumba, K. L. Page, K. Mahalingam, J. Milam-Guerrero, R. Haiges, M. Mecklenburg, B. C. Melot, Y. D. Jho, B. M. Howe, M. E. Manley, J. Ravichandran, and A. J. Minnich, Nat. Mat. under review. Abstract Crystalline solids exhibiting glass-like thermal conductivity have attracted substantial attention both for fundamental interest and applications such as thermoelectrics [1{6]. In...

"Emission analysis of Tb3+‐and Sm3+‐ion‐doped (Li2O/Na2O/K2O) and (Li2O + Na2O/Li2O + K2O/K2O + Na2O)‐modified borosilicate glasses", B Naveen Kumar Reddy, S Sailaja, K Thyagarajan, Young Dahl Jho, B Sudhakar Reddy, Luminescence 33, 486 (2018).

"Mapping of surface and interfacial strain in tapered ZnO nanorods by two-photon confocal laser scanning nanoscopy", Hyeong-Yong Hwang, Raqibul Hossen, Hoonil Jeong, Mun-Do Park, Hyeonjun Baek, Dong-Seon Lee, Gyu-Chul Yi, Young-Dahl Jho† (submitted)

"Detailed carrier recombination in lateral composition modulation structure", Kwangwook Park, Sooraj Ravindran, Seokjin Kang, Jung-Wook Min, Hyeong-Yong Hwang, Young-Dahl Jho, Yong-Ryun Jo, Bong-Joong Kim, Jongmin Kim, Yong-Tak Lee, Applied Physics Express 11 (9), 095801 Abstract Carrier recombination in lateral composition modulation (LCM) GaInP was probed in detail using time-resolved photoluminescence (TR-PL) and transmission electron microscopy (TEM). Upon SiO2 passivation, the time-transient...

"Nonlinear Photoelasticity to Explicate Acoustic Phonon Phase under Anharmonic and Extrinsic Decay", S. H. Lee, H. Jeong, H. Lee, A. J. Minnich, S.-R. Jeon, T. H. Chung, C. J. Stanton, and Y. D. Jho†, (arXiv:1803.02105v2); Phys. Rev. Lett. (to be submitted).

"Coherent control of thermal phonon transport in van der Waals superlattices", Ruiqiang Guo, Young-Dahl Jho, and Austin J. Minnich, Nanoscale, 10, 14432 (2018). Abstract: Van der Waals (vdW) heterostructures are a central focus of materials science and condensed matter physics due to the novel physical phenomena and properties obtained by precisely stacking heterogeneous atomically thin layers. vdW heterostructures are expected to allow for the coherent manipulation of THz lattice vibrations and ...

"Suppressing non-radiative recombination in crown-shaped quantum wells", Gunwu Ju, Byung Hoon Na, Kwangwook Park, Hyeong-Yong Hwang, Young-Dahl Jho, NoSoung Myoung, Sang-Youp Yim, Hyung-jun Kim, Yong Tak Lee, Jpn. J. Appl. Phys. 57, 030305 (2018) Abstract: We examined the structural and optical properties of a crown-shaped quantum well (CSQW) to suppress nonradiative recombination. To reduce carrier loss in defect traps at the well/barrier interface, the CSQW was designed to concentrate carriers ...

"Analysis of carrier recombination in lateral composition modulated GaInP grown by molecular beam epitaxy" Kwangwook Park, Sooraj Ravindran, Seokjin Kang, Jung-Wook Min, Hyeong-Yong Hwang, Young-Dahl Jho, Yong-Ryun Jo, Bong-Joong Kim, and Yong Tak Lee, APL (submitted)

"Emission analysis of Tb3+-and Sm3+-ion-doped alkali-oxide-modified borosilicate glasses", B. Naveen Kumar Reddy, S. Sailaja, K. Thyagarajan,Young Dahl Jho*, and .B.S. Reddy*, Luminescence: The Journal of Biological and Chemical Luminescence, bio3437, 1-9 (2017). Abstract Four series of borosilicate glasses modified by alkali oxides and doped with Tb3+ and Sm3+ ions were prepared using the conventional melt quenching technique, with the chemical composition 74.5B2O3 + 10SiO2 + 5MgO + R + 0.5(Tb2O...

"Elastic and thermal properties of free-standing molybdenum disulfide membranes measured using ultrafast transient grating spectroscopy", Taeyong Kim, Ding Ding, Jong-Hyuk Yim, Young-Dahl Jho* and Austin J. Minnich*, APL Materials 5, 086105 (2017). Abstract: Molybdenum disulfide (MoS2), a member of transition-metal dichalcogenide family, is of intense interest due to its unique electronic and thermoelectric properties. However, reports of its in-plane thermal conductivity vary due to the difficul...

"Optical characterization of Eu3+ ion doped alkali oxide modified borosilicate glasses for red laser and display device applications",B. Naveen Kumar Reddy, B. Devaprasad Raju, K. Thyagarajanc, R.Ramanaiaha, Young-Dahl Jho*, B. Sudhakar Reddy, Ceramics International, 43, 8886 (2017).

"III-nitride core shell nanorod array on quartz substrates", Si-Young Bae, Jung-Wook Min, Hyeong-Yong Hwang, Kaddour Lekhal, Ho-Jun Lee, Young-Dahl Jho, Dong-Seon Lee, Yong-Tak Lee, Nobuyuki Ikarashi, Yoshio Honda, and Hiroshi Amano, Scientific Reports 7, 45345 (2017).

"Robust optical properties of sandwiched lateral composition modulation GaInP structure grown by molecular beam epitaxy", Kwangwook Park, Seokjin Kang, Sooraj Ravindran, Jung-Wook Min, Hyeong-Yong Hwang, Young-Dahl Jho, Yong Tak Lee, Appl. Phys. Lett. 109, 262103 (2016).

"Optical and structural properties of microcrystalline GaN on an amorphous substrate prepared by a combination of molecular beam epitaxy and metal–organic chemical vapor deposition", Jung-Wook Min, Hyeong-Yong Hwang, Eun-Kyu Kang, Kwangwook Park, Ci-Hyun Kim,Dong-Seon Lee, Young-Dahl Jho, Si-Young Bae, and Yong-Tak Lee, Jpn. J. Appl. Phys. 55, 05FB03 (2016).

"Distinctive mapping of strain and quantum size effects using depth-resolved photoluminescence in ZnO nanoneedles", Hyeong-Yong Hwang, Hyeonjun Baek, Gyu-Chul Yi, Hyoung-Chan Kim, and Young-Dahl Jho, AIP advances 6, 4, pp. 045021 (2016).

"Manipulation of terahertz waves by work function engineering in metal-graphite structures", Muhammad Irfan, Soo Kyung Lee, Jong-Hyuk Yim, Yong Tak Lee and Young-Dahl Jho, Appl. Phys. Lett. 108, 161104 (2016).

"Electrical Modulation and Switching of Acoustic Phonons", H. Jeong, Y.D. Jho*, S. H. Rhim, K.J. Yee, J.P. Shim, D.S. Lee, J.W. Joo, J. H. Baek, and C. J. Stanton, Phys. Rev. B 94, 024307 (2016). Abstract We report on the electrical manipulation of coherent acoustic phonon waves in GaN-based nanoscale piezoelectric heterostructures which are strained both from the pseudomorphic growth at the interfaces as well as through external electric fields. In such structures, transverse symmetry within the...

(invited) "Electro-phononics for modulating acoustic pulses", Y. D. Jho* and H. Jeong, Proc. SPIE 9746, Ultrafast Phenomena and Nanophotonics XX, 97461K (March 14, 2016)

"Temperature-Dependent Mean Free Path Spectra of Thermal Phonons Along the c-Axis of Graphite", Hang Zhang, Xiangwen Chen, Young-Dahl Jho, and Austin J. Minnich, Nano Lett., 2016, 16 (3), pp 1643–1649.

"Emission analysis of RE3+ (RE=Eu, Sm, Dy):MgY4Si3O13 phosphors", B. Sudhakar Reddy, Monali R. Kadukar, Hyeong-Yong Hwang, S. Sailaja, S.J. Dhoble, and Young-Dahl Jho, Physica B 463, 39 (2015).